add via modify part source code for wm8880 4.4 kitkat

1 files changed, 1821 insertions, 1138 deletions

diff --git a/ANDROID_3.4.5/fs/yaffs2/yaffs_vfs.c b/ANDROID_3.4.5/fs/yaffs2/yaffs_vfs.c
index d5b87531..c793271a 100644
--- a/ANDROID_3.4.5/fs/yaffs2/yaffs_vfs.c
+++ b/ANDROID_3.4.5/fs/yaffs2/yaffs_vfs.c
@@ -1,7 +1,7 @@
 /*
  * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
  *
- * Copyright (C) 2002-2010 Aleph One Ltd.
+ * Copyright (C) 2002-2011 Aleph One Ltd.
  *   for Toby Churchill Ltd and Brightstar Engineering
  *
  * Created by Charles Manning <charles@aleph1.co.uk>
@@ -32,51 +32,138 @@
  */
 
 /*
- * NB There are two variants of Linux VFS glue code. This variant supports
- * a single version and should not include any multi-version code.
+ * There are two variants of the VFS glue code. This variant should compile
+ * for any version of Linux.
  */
 #include <linux/version.h>
 
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 10))
+#define YAFFS_COMPILE_BACKGROUND
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 23))
+#define YAFFS_COMPILE_FREEZER
+#endif
+#endif
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 28))
+#define YAFFS_COMPILE_EXPORTFS
+#endif
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 35))
+#define YAFFS_USE_SETATTR_COPY
+#define YAFFS_USE_TRUNCATE_SETSIZE
+#endif
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 35))
+#define YAFFS_HAS_EVICT_INODE
+#endif
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
+#define YAFFS_NEW_FOLLOW_LINK 1
+#else
+#define YAFFS_NEW_FOLLOW_LINK 0
+#endif
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
+#include <linux/config.h>
+#endif
+
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/init.h>
 #include <linux/fs.h>
 #include <linux/proc_fs.h>
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 39))
 #include <linux/smp_lock.h>
+#endif
 #include <linux/pagemap.h>
 #include <linux/mtd/mtd.h>
 #include <linux/interrupt.h>
 #include <linux/string.h>
 #include <linux/ctype.h>
+
+#if (YAFFS_NEW_FOLLOW_LINK == 1)
 #include <linux/namei.h>
+#endif
+
+#ifdef YAFFS_COMPILE_EXPORTFS
 #include <linux/exportfs.h>
+#endif
+
+#ifdef YAFFS_COMPILE_BACKGROUND
 #include <linux/kthread.h>
 #include <linux/delay.h>
+#endif
+#ifdef YAFFS_COMPILE_FREEZER
 #include <linux/freezer.h>
+#endif
 
 #include <asm/div64.h>
 
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+
 #include <linux/statfs.h>
 
 #define UnlockPage(p) unlock_page(p)
 #define Page_Uptodate(page)	test_bit(PG_uptodate, &(page)->flags)
 
+/* FIXME: use sb->s_id instead ? */
 #define yaffs_devname(sb, buf)	bdevname(sb->s_bdev, buf)
 
+#else
+
+#include <linux/locks.h>
+#define	BDEVNAME_SIZE		0
+#define	yaffs_devname(sb, buf)	kdevname(sb->s_dev)
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0))
+/* added NCB 26/5/2006 for 2.4.25-vrs2-tcl1 kernel */
+#define __user
+#endif
+
+#endif
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26))
+#define YPROC_ROOT  (&proc_root)
+#else
 #define YPROC_ROOT  NULL
+#endif
 
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26))
+#define Y_INIT_TIMER(a)	init_timer(a)
+#else
 #define Y_INIT_TIMER(a)	init_timer_on_stack(a)
+#endif
 
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
 #define WRITE_SIZE_STR "writesize"
 #define WRITE_SIZE(mtd) ((mtd)->writesize)
+#else
+#define WRITE_SIZE_STR "oobblock"
+#define WRITE_SIZE(mtd) ((mtd)->oobblock)
+#endif
 
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 27))
+#define YAFFS_USE_WRITE_BEGIN_END 1
+#else
+#define YAFFS_USE_WRITE_BEGIN_END 0
+#endif
+
+
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 2, 0))
+#define set_nlink(inode, count)  do { (inode)->i_nlink = (count); } while(0)
+#endif
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 28))
 static uint32_t YCALCBLOCKS(uint64_t partition_size, uint32_t block_size)
 {
 	uint64_t result = partition_size;
 	do_div(result, block_size);
 	return (uint32_t) result;
 }
+#else
+#define YCALCBLOCKS(s, b) ((s)/(b))
+#endif
 
 #include <linux/uaccess.h>
 #include <linux/mtd/mtd.h>
@@ -97,590 +184,412 @@ unsigned int yaffs_wr_attempts = YAFFS_WR_ATTEMPTS;
 unsigned int yaffs_auto_checkpoint = 1;
 unsigned int yaffs_gc_control = 1;
 unsigned int yaffs_bg_enable = 1;
-
+unsigned int yaffs_auto_select = 1;
 /* Module Parameters */
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
 module_param(yaffs_trace_mask, uint, 0644);
 module_param(yaffs_wr_attempts, uint, 0644);
 module_param(yaffs_auto_checkpoint, uint, 0644);
 module_param(yaffs_gc_control, uint, 0644);
 module_param(yaffs_bg_enable, uint, 0644);
+#else
+MODULE_PARM(yaffs_trace_mask, "i");
+MODULE_PARM(yaffs_wr_attempts, "i");
+MODULE_PARM(yaffs_auto_checkpoint, "i");
+MODULE_PARM(yaffs_gc_control, "i");
+#endif
 
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25))
+/* use iget and read_inode */
+#define Y_IGET(sb, inum) iget((sb), (inum))
+static void yaffs_read_inode(struct inode *inode);
+
+#else
+/* Call local equivalent */
+#define YAFFS_USE_OWN_IGET
+#define Y_IGET(sb, inum) yaffs_iget((sb), (inum))
 
+static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino);
+#endif
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18))
 #define yaffs_inode_to_obj_lv(iptr) ((iptr)->i_private)
-#define yaffs_inode_to_obj(iptr) ((struct yaffs_obj *)(yaffs_inode_to_obj_lv(iptr)))
+#else
+#define yaffs_inode_to_obj_lv(iptr) ((iptr)->u.generic_ip)
+#endif
+
+#define yaffs_inode_to_obj(iptr) \
+	((struct yaffs_obj *)(yaffs_inode_to_obj_lv(iptr)))
 #define yaffs_dentry_to_obj(dptr) yaffs_inode_to_obj((dptr)->d_inode)
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
 #define yaffs_super_to_dev(sb)	((struct yaffs_dev *)sb->s_fs_info)
+#else
+#define yaffs_super_to_dev(sb)	((struct yaffs_dev *)sb->u.generic_sbp)
+#endif
 
 #define update_dir_time(dir) do {\
 			(dir)->i_ctime = (dir)->i_mtime = CURRENT_TIME; \
-		} while(0)
-
+		} while (0)
 
-static unsigned yaffs_gc_control_callback(struct yaffs_dev *dev)
-{
-	return yaffs_gc_control;
-}
+static void yaffs_put_super(struct super_block *sb);
 
-static void yaffs_gross_lock(struct yaffs_dev *dev)
-{
-	yaffs_trace(YAFFS_TRACE_LOCK, "yaffs locking %p", current);
-	mutex_lock(&(yaffs_dev_to_lc(dev)->gross_lock));
-	yaffs_trace(YAFFS_TRACE_LOCK, "yaffs locked %p", current);
-}
-
-static void yaffs_gross_unlock(struct yaffs_dev *dev)
-{
-	yaffs_trace(YAFFS_TRACE_LOCK, "yaffs unlocking %p", current);
-	mutex_unlock(&(yaffs_dev_to_lc(dev)->gross_lock));
-}
-
-static void yaffs_fill_inode_from_obj(struct inode *inode,
-				      struct yaffs_obj *obj);
-
-static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino)
-{
-	struct inode *inode;
-	struct yaffs_obj *obj;
-	struct yaffs_dev *dev = yaffs_super_to_dev(sb);
-
-	yaffs_trace(YAFFS_TRACE_OS, "yaffs_iget for %lu", ino);
-
-	inode = iget_locked(sb, ino);
-	if (!inode)
-		return ERR_PTR(-ENOMEM);
-	if (!(inode->i_state & I_NEW))
-		return inode;
-
-	/* NB This is called as a side effect of other functions, but
-	 * we had to release the lock to prevent deadlocks, so
-	 * need to lock again.
-	 */
-
-	yaffs_gross_lock(dev);
-
-	obj = yaffs_find_by_number(dev, inode->i_ino);
-
-	yaffs_fill_inode_from_obj(inode, obj);
-
-	yaffs_gross_unlock(dev);
-
-	unlock_new_inode(inode);
-	return inode;
-}
-
-struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
-			      struct yaffs_obj *obj)
-{
-	struct inode *inode;
+static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
+				loff_t *pos);
+static ssize_t yaffs_hold_space(struct file *f);
+static void yaffs_release_space(struct file *f);
 
-	if (!sb) {
-		yaffs_trace(YAFFS_TRACE_OS,
-			"yaffs_get_inode for NULL super_block!!");
-		return NULL;
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+static int yaffs_file_flush(struct file *file, fl_owner_t id);
+#else
+static int yaffs_file_flush(struct file *file);
+#endif
 
-	}
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 39))
+static int yaffs_sync_object(struct file *file, loff_t start, loff_t end, int datasync);
+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 34))
+static int yaffs_sync_object(struct file *file, int datasync);
+#else
+static int yaffs_sync_object(struct file *file, struct dentry *dentry,
+			     int datasync);
+#endif
 
-	if (!obj) {
-		yaffs_trace(YAFFS_TRACE_OS,
-			"yaffs_get_inode for NULL object!!");
-		return NULL;
+static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir);
 
-	}
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+static int yaffs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
+			struct nameidata *n);
+static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
+				   struct nameidata *n);
+#else
+static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode);
+static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry);
+#endif
+static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
+		      struct dentry *dentry);
+static int yaffs_unlink(struct inode *dir, struct dentry *dentry);
+static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
+			 const char *symname);
+static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode);
 
-	yaffs_trace(YAFFS_TRACE_OS,
-		"yaffs_get_inode for object %d",
-		obj->obj_id);
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+static int yaffs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,
+		       dev_t dev);
+#else
+static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
+		       int dev);
+#endif
+static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
+			struct inode *new_dir, struct dentry *new_dentry);
+static int yaffs_setattr(struct dentry *dentry, struct iattr *attr);
 
-	inode = yaffs_iget(sb, obj->obj_id);
-	if (IS_ERR(inode))
-		return NULL;
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+static int yaffs_sync_fs(struct super_block *sb, int wait);
+static void yaffs_write_super(struct super_block *sb);
+#else
+static int yaffs_sync_fs(struct super_block *sb);
+static int yaffs_write_super(struct super_block *sb);
+#endif
 
-	/* NB Side effect: iget calls back to yaffs_read_inode(). */
-	/* iget also increments the inode's i_count */
-	/* NB You can't be holding gross_lock or deadlock will happen! */
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf);
+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf);
+#else
+static int yaffs_statfs(struct super_block *sb, struct statfs *buf);
+#endif
 
-	return inode;
-}
+#ifdef YAFFS_HAS_PUT_INODE
+static void yaffs_put_inode(struct inode *inode);
+#endif
 
-static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
-		       dev_t rdev)
-{
-	struct inode *inode;
+#ifdef YAFFS_HAS_EVICT_INODE
+static void yaffs_evict_inode(struct inode *);
+#else
+static void yaffs_delete_inode(struct inode *);
+static void yaffs_clear_inode(struct inode *);
+#endif
 
-	struct yaffs_obj *obj = NULL;
-	struct yaffs_dev *dev;
+static int yaffs_readpage(struct file *file, struct page *page);
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+static int yaffs_writepage(struct page *page, struct writeback_control *wbc);
+#else
+static int yaffs_writepage(struct page *page);
+#endif
 
-	struct yaffs_obj *parent = yaffs_inode_to_obj(dir);
+static int yaffs_setxattr(struct dentry *dentry, const char *name,
+		   const void *value, size_t size, int flags);
+static ssize_t yaffs_getxattr(struct dentry *dentry, const char *name,
+				void *buff, size_t size);
+static int yaffs_removexattr(struct dentry *dentry, const char *name);
+static ssize_t yaffs_listxattr(struct dentry *dentry, char *buff, size_t size);
 
-	int error = -ENOSPC;
-	uid_t uid = current->cred->fsuid;
-	gid_t gid =
-	    (dir->i_mode & S_ISGID) ? dir->i_gid : current->cred->fsgid;
+#if (YAFFS_USE_WRITE_BEGIN_END != 0)
+static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
+			     loff_t pos, unsigned len, unsigned flags,
+			     struct page **pagep, void **fsdata);
+static int yaffs_write_end(struct file *filp, struct address_space *mapping,
+			   loff_t pos, unsigned len, unsigned copied,
+			   struct page *pg, void *fsdadata);
+#else
+static int yaffs_prepare_write(struct file *f, struct page *pg,
+			       unsigned offset, unsigned to);
+static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
+			      unsigned to);
 
-	if ((dir->i_mode & S_ISGID) && S_ISDIR(mode))
-		mode |= S_ISGID;
+#endif
 
-	if (parent) {
-		yaffs_trace(YAFFS_TRACE_OS,
-			"yaffs_mknod: parent object %d type %d",
-			parent->obj_id, parent->variant_type);
-	} else {
-		yaffs_trace(YAFFS_TRACE_OS,
-			"yaffs_mknod: could not get parent object");
-		return -EPERM;
-	}
+static int yaffs_readlink(struct dentry *dentry, char __user * buffer,
+			  int buflen);
+#if (YAFFS_NEW_FOLLOW_LINK == 1)
+void yaffs_put_link(struct dentry *dentry, struct nameidata *nd, void *alias);
+static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
+#else
+static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
+#endif
 
-	yaffs_trace(YAFFS_TRACE_OS,
-		"yaffs_mknod: making oject for %s, mode %x dev %x",
-		dentry->d_name.name, mode, rdev);
+static void yaffs_touch_super(struct yaffs_dev *dev);
 
-	dev = parent->my_dev;
+static int yaffs_vfs_setattr(struct inode *, struct iattr *);
 
-	yaffs_gross_lock(dev);
+static struct address_space_operations yaffs_file_address_operations = {
+	.readpage = yaffs_readpage,
+	.writepage = yaffs_writepage,
+#if (YAFFS_USE_WRITE_BEGIN_END > 0)
+	.write_begin = yaffs_write_begin,
+	.write_end = yaffs_write_end,
+#else
+	.prepare_write = yaffs_prepare_write,
+	.commit_write = yaffs_commit_write,
+#endif
+};
 
-	switch (mode & S_IFMT) {
-	default:
-		/* Special (socket, fifo, device...) */
-		yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod: making special");
-		obj =
-		    yaffs_create_special(parent, dentry->d_name.name, mode, uid,
-					 gid, old_encode_dev(rdev));
-		break;
-	case S_IFREG:		/* file          */
-		yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod: making file");
-		obj = yaffs_create_file(parent, dentry->d_name.name, mode, uid,
-					gid);
-		break;
-	case S_IFDIR:		/* directory */
-		yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod: making directory");
-		obj = yaffs_create_dir(parent, dentry->d_name.name, mode,
-				       uid, gid);
-		break;
-	case S_IFLNK:		/* symlink */
-		yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod: making symlink");
-		obj = NULL;	/* Do we ever get here? */
-		break;
-	}
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 22))
+static const struct file_operations yaffs_file_operations = {
+	.read = do_sync_read,
+	.write = do_sync_write,
+	.aio_read = generic_file_aio_read,
+	.aio_write = generic_file_aio_write,
+	.mmap = generic_file_mmap,
+	.flush = yaffs_file_flush,
+	.fsync = yaffs_sync_object,
+	.splice_read = generic_file_splice_read,
+	.splice_write = generic_file_splice_write,
+	.llseek = generic_file_llseek,
+};
 
-	/* Can not call yaffs_get_inode() with gross lock held */
-	yaffs_gross_unlock(dev);
+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18))
 
-	if (obj) {
-		inode = yaffs_get_inode(dir->i_sb, mode, rdev, obj);
-		d_instantiate(dentry, inode);
-		update_dir_time(dir);
-		yaffs_trace(YAFFS_TRACE_OS,
-			"yaffs_mknod created object %d count = %d",
-			obj->obj_id, atomic_read(&inode->i_count));
-		error = 0;
-		yaffs_fill_inode_from_obj(dir, parent);
-	} else {
-		yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod failed making object");
-		error = -ENOMEM;
-	}
+static const struct file_operations yaffs_file_operations = {
+	.read = do_sync_read,
+	.write = do_sync_write,
+	.aio_read = generic_file_aio_read,
+	.aio_write = generic_file_aio_write,
+	.mmap = generic_file_mmap,
+	.flush = yaffs_file_flush,
+	.fsync = yaffs_sync_object,
+	.sendfile = generic_file_sendfile,
+};
 
-	return error;
-}
+#else
 
-static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
-{
-	return yaffs_mknod(dir, dentry, mode | S_IFDIR, 0);
-}
+static const struct file_operations yaffs_file_operations = {
+	.read = generic_file_read,
+	.write = generic_file_write,
+	.mmap = generic_file_mmap,
+	.flush = yaffs_file_flush,
+	.fsync = yaffs_sync_object,
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+	.sendfile = generic_file_sendfile,
+#endif
+};
+#endif
 
-static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode,
-			struct nameidata *n)
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25))
+static void zero_user_segment(struct page *page, unsigned start, unsigned end)
 {
-	return yaffs_mknod(dir, dentry, mode | S_IFREG, 0);
+	void *kaddr = kmap_atomic(page, KM_USER0);
+	memset(kaddr + start, 0, end - start);
+	kunmap_atomic(kaddr, KM_USER0);
+	flush_dcache_page(page);
 }
+#endif
 
-static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
-		      struct dentry *dentry)
-{
-	struct inode *inode = old_dentry->d_inode;
-	struct yaffs_obj *obj = NULL;
-	struct yaffs_obj *link = NULL;
-	struct yaffs_dev *dev;
-
-	yaffs_trace(YAFFS_TRACE_OS, "yaffs_link");
+static const struct inode_operations yaffs_file_inode_operations = {
+	.setattr = yaffs_setattr,
+	.setxattr = yaffs_setxattr,
+	.getxattr = yaffs_getxattr,
+	.listxattr = yaffs_listxattr,
+	.removexattr = yaffs_removexattr,
+};
 
-	obj = yaffs_inode_to_obj(inode);
-	dev = obj->my_dev;
+static const struct inode_operations yaffs_symlink_inode_operations = {
+	.readlink = yaffs_readlink,
+	.follow_link = yaffs_follow_link,
+#if (YAFFS_NEW_FOLLOW_LINK == 1)
+	.put_link = yaffs_put_link,
+#endif
+	.setattr = yaffs_setattr,
+	.setxattr = yaffs_setxattr,
+	.getxattr = yaffs_getxattr,
+	.listxattr = yaffs_listxattr,
+	.removexattr = yaffs_removexattr,
+};
 
-	yaffs_gross_lock(dev);
+static const struct inode_operations yaffs_dir_inode_operations = {
+	.create = yaffs_create,
+	.lookup = yaffs_lookup,
+	.link = yaffs_link,
+	.unlink = yaffs_unlink,
+	.symlink = yaffs_symlink,
+	.mkdir = yaffs_mkdir,
+	.rmdir = yaffs_unlink,
+	.mknod = yaffs_mknod,
+	.rename = yaffs_rename,
+	.setattr = yaffs_setattr,
+	.setxattr = yaffs_setxattr,
+	.getxattr = yaffs_getxattr,
+	.listxattr = yaffs_listxattr,
+	.removexattr = yaffs_removexattr,
+};
 
-	if (!S_ISDIR(inode->i_mode))	/* Don't link directories */
-		link =
-		    yaffs_link_obj(yaffs_inode_to_obj(dir), dentry->d_name.name,
-				   obj);
+static const struct file_operations yaffs_dir_operations = {
+	.read = generic_read_dir,
+	.readdir = yaffs_readdir,
+	.fsync = yaffs_sync_object,
+	.llseek = generic_file_llseek,
+};
 
-	if (link) {
-		old_dentry->d_inode->i_nlink = yaffs_get_obj_link_count(obj);
-		d_instantiate(dentry, old_dentry->d_inode);
-		atomic_inc(&old_dentry->d_inode->i_count);
-		yaffs_trace(YAFFS_TRACE_OS,
-			"yaffs_link link count %d i_count %d",
-			old_dentry->d_inode->i_nlink,
-			atomic_read(&old_dentry->d_inode->i_count));
-	}
+static const struct super_operations yaffs_super_ops = {
+	.statfs = yaffs_statfs,
 
-	yaffs_gross_unlock(dev);
+#ifndef YAFFS_USE_OWN_IGET
+	.read_inode = yaffs_read_inode,
+#endif
+#ifdef YAFFS_HAS_PUT_INODE
+	.put_inode = yaffs_put_inode,
+#endif
+	.put_super = yaffs_put_super,
+#ifdef YAFFS_HAS_EVICT_INODE
+	.evict_inode = yaffs_evict_inode,
+#else
+	.delete_inode = yaffs_delete_inode,
+	.clear_inode = yaffs_clear_inode,
+#endif
+	.sync_fs = yaffs_sync_fs,
+	.write_super = yaffs_write_super,
+};
 
-	if (link) {
-		update_dir_time(dir);
-		return 0;
-	}
+static int yaffs_vfs_setattr(struct inode *inode, struct iattr *attr)
+{
+#ifdef YAFFS_USE_SETATTR_COPY
+	setattr_copy(inode, attr);
+	return 0;
+#else
+	return inode_setattr(inode, attr);
+#endif
 
-	return -EPERM;
 }
 
-static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
-			 const char *symname)
+static int yaffs_vfs_setsize(struct inode *inode, loff_t newsize)
 {
-	struct yaffs_obj *obj;
-	struct yaffs_dev *dev;
-	uid_t uid = current->cred->fsuid;
-	gid_t gid =
-	    (dir->i_mode & S_ISGID) ? dir->i_gid : current->cred->fsgid;
-
-	yaffs_trace(YAFFS_TRACE_OS, "yaffs_symlink");
-
-	dev = yaffs_inode_to_obj(dir)->my_dev;
-	yaffs_gross_lock(dev);
-	obj = yaffs_create_symlink(yaffs_inode_to_obj(dir), dentry->d_name.name,
-				   S_IFLNK | S_IRWXUGO, uid, gid, symname);
-	yaffs_gross_unlock(dev);
-
-	if (obj) {
-		struct inode *inode;
-
-		inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
-		d_instantiate(dentry, inode);
-		update_dir_time(dir);
-		yaffs_trace(YAFFS_TRACE_OS, "symlink created OK");
-		return 0;
-	} else {
-		yaffs_trace(YAFFS_TRACE_OS, "symlink not created");
-	}
+#ifdef YAFFS_USE_TRUNCATE_SETSIZE
+	truncate_setsize(inode, newsize);
+	return 0;
+#else
+	truncate_inode_pages(&inode->i_data, newsize);
+	return 0;
+#endif
 
-	return -ENOMEM;
 }
 
-static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
-				   struct nameidata *n)
+static unsigned yaffs_gc_control_callback(struct yaffs_dev *dev)
 {
-	struct yaffs_obj *obj;
-	struct inode *inode = NULL;
-
-	struct yaffs_dev *dev = yaffs_inode_to_obj(dir)->my_dev;
-
-	if (current != yaffs_dev_to_lc(dev)->readdir_process)
-		yaffs_gross_lock(dev);
-
-	yaffs_trace(YAFFS_TRACE_OS,
-		"yaffs_lookup for %d:%s",
-		yaffs_inode_to_obj(dir)->obj_id, dentry->d_name.name);
-
-	obj = yaffs_find_by_name(yaffs_inode_to_obj(dir), dentry->d_name.name);
-
-	obj = yaffs_get_equivalent_obj(obj);	/* in case it was a hardlink */
-
-	/* Can't hold gross lock when calling yaffs_get_inode() */
-	if (current != yaffs_dev_to_lc(dev)->readdir_process)
-		yaffs_gross_unlock(dev);
-
-	if (obj) {
-		yaffs_trace(YAFFS_TRACE_OS,
-			"yaffs_lookup found %d", obj->obj_id);
-
-		inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
-
-		if (inode) {
-			yaffs_trace(YAFFS_TRACE_OS, "yaffs_loookup dentry");
-			d_add(dentry, inode);
-			/* return dentry; */
-			return NULL;
-		}
-
-	} else {
-		yaffs_trace(YAFFS_TRACE_OS, "yaffs_lookup not found");
-
-	}
-
-	d_add(dentry, inode);
-
-	return NULL;
+	return yaffs_gc_control;
 }
 
-static int yaffs_unlink(struct inode *dir, struct dentry *dentry)
+static void yaffs_gross_lock(struct yaffs_dev *dev)
 {
-	int ret_val;
-
-	struct yaffs_dev *dev;
-	struct yaffs_obj *obj;
-
-	yaffs_trace(YAFFS_TRACE_OS,
-		"yaffs_unlink %d:%s",
-		(int)(dir->i_ino), dentry->d_name.name);
-	obj = yaffs_inode_to_obj(dir);
-	dev = obj->my_dev;
-
-	yaffs_gross_lock(dev);
-
-	ret_val = yaffs_unlinker(obj, dentry->d_name.name);
-
-	if (ret_val == YAFFS_OK) {
-		dentry->d_inode->i_nlink--;
-		dir->i_version++;
-		yaffs_gross_unlock(dev);
-		mark_inode_dirty(dentry->d_inode);
-		update_dir_time(dir);
-		return 0;
-	}
-	yaffs_gross_unlock(dev);
-	return -ENOTEMPTY;
+	yaffs_trace(YAFFS_TRACE_LOCK, "yaffs locking %p", current);
+	mutex_lock(&(yaffs_dev_to_lc(dev)->gross_lock));
+	yaffs_trace(YAFFS_TRACE_LOCK, "yaffs locked %p", current);
 }
 
-static int yaffs_sync_object(struct file *file, int datasync)
+static void yaffs_gross_unlock(struct yaffs_dev *dev)
 {
-
-	struct yaffs_obj *obj;
-	struct yaffs_dev *dev;
-	struct dentry *dentry = file->f_path.dentry;
-
-	obj = yaffs_dentry_to_obj(dentry);
-
-	dev = obj->my_dev;
-
-	yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC, "yaffs_sync_object");
-	yaffs_gross_lock(dev);
-	yaffs_flush_file(obj, 1, datasync);
-	yaffs_gross_unlock(dev);
-	return 0;
+	yaffs_trace(YAFFS_TRACE_LOCK, "yaffs unlocking %p", current);
+	mutex_unlock(&(yaffs_dev_to_lc(dev)->gross_lock));
 }
-/*
- * The VFS layer already does all the dentry stuff for rename.
- *
- * NB: POSIX says you can rename an object over an old object of the same name
- */
-static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
-			struct inode *new_dir, struct dentry *new_dentry)
-{
-	struct yaffs_dev *dev;
-	int ret_val = YAFFS_FAIL;
-	struct yaffs_obj *target;
-
-	yaffs_trace(YAFFS_TRACE_OS, "yaffs_rename");
-	dev = yaffs_inode_to_obj(old_dir)->my_dev;
-
-	yaffs_gross_lock(dev);
-
-	/* Check if the target is an existing directory that is not empty. */
-	target = yaffs_find_by_name(yaffs_inode_to_obj(new_dir),
-				    new_dentry->d_name.name);
 
-	if (target && target->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY &&
-	    !list_empty(&target->variant.dir_variant.children)) {
-
-		yaffs_trace(YAFFS_TRACE_OS, "target is non-empty dir");
-
-		ret_val = YAFFS_FAIL;
-	} else {
-		/* Now does unlinking internally using shadowing mechanism */
-		yaffs_trace(YAFFS_TRACE_OS, "calling yaffs_rename_obj");
+#ifdef YAFFS_COMPILE_EXPORTFS
 
-		ret_val = yaffs_rename_obj(yaffs_inode_to_obj(old_dir),
-					   old_dentry->d_name.name,
-					   yaffs_inode_to_obj(new_dir),
-					   new_dentry->d_name.name);
-	}
-	yaffs_gross_unlock(dev);
-
-	if (ret_val == YAFFS_OK) {
-		if (target) {
-			new_dentry->d_inode->i_nlink--;
-			mark_inode_dirty(new_dentry->d_inode);
-		}
-
-		update_dir_time(old_dir);
-		if (old_dir != new_dir)
-			update_dir_time(new_dir);
-		return 0;
-	} else {
-		return -ENOTEMPTY;
-	}
-}
-
-static int yaffs_setattr(struct dentry *dentry, struct iattr *attr)
+static struct inode *yaffs2_nfs_get_inode(struct super_block *sb, uint64_t ino,
+					  uint32_t generation)
 {
-	struct inode *inode = dentry->d_inode;
-	int error = 0;
-	struct yaffs_dev *dev;
-
-	yaffs_trace(YAFFS_TRACE_OS,
-		"yaffs_setattr of object %d",
-		yaffs_inode_to_obj(inode)->obj_id);
-
-	/* Fail if a requested resize >= 2GB */
-	if (attr->ia_valid & ATTR_SIZE && (attr->ia_size >> 31))
-		error = -EINVAL;
-
-	if (error == 0)
-		error = inode_change_ok(inode, attr);
-	if (error == 0) {
-		int result;
-		if (!error) {
-			setattr_copy(inode, attr);
-			yaffs_trace(YAFFS_TRACE_OS, "inode_setattr called");
-			if (attr->ia_valid & ATTR_SIZE) {
-				truncate_setsize(inode, attr->ia_size);
-				inode->i_blocks = (inode->i_size + 511) >> 9;
-			}
-		}
-		dev = yaffs_inode_to_obj(inode)->my_dev;
-		if (attr->ia_valid & ATTR_SIZE) {
-			yaffs_trace(YAFFS_TRACE_OS, "resize to %d(%x)",
-					   (int)(attr->ia_size),
-					   (int)(attr->ia_size));
-		}
-		yaffs_gross_lock(dev);
-		result = yaffs_set_attribs(yaffs_inode_to_obj(inode), attr);
-		if (result == YAFFS_OK) {
-			error = 0;
-		} else {
-			error = -EPERM;
-		}
-		yaffs_gross_unlock(dev);
-
-	}
-
-	yaffs_trace(YAFFS_TRACE_OS, "yaffs_setattr done returning %d", error);
-
-	return error;
+	return Y_IGET(sb, ino);
 }
 
-#ifdef CONFIG_YAFFS_XATTR
-static int yaffs_setxattr(struct dentry *dentry, const char *name,
-		   const void *value, size_t size, int flags)
+static struct dentry *yaffs2_fh_to_dentry(struct super_block *sb,
+					  struct fid *fid, int fh_len,
+					  int fh_type)
 {
-	struct inode *inode = dentry->d_inode;
-	int error = 0;
-	struct yaffs_dev *dev;
-	struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
-
-	yaffs_trace(YAFFS_TRACE_OS, "yaffs_setxattr of object %d", obj->obj_id);
-
-	if (error == 0) {
-		int result;
-		dev = obj->my_dev;
-		yaffs_gross_lock(dev);
-		result = yaffs_set_xattrib(obj, name, value, size, flags);
-		if (result == YAFFS_OK)
-			error = 0;
-		else if (result < 0)
-			error = result;
-		yaffs_gross_unlock(dev);
-
-	}
-	yaffs_trace(YAFFS_TRACE_OS, "yaffs_setxattr done returning %d", error);
-
-	return error;
+	return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
+				    yaffs2_nfs_get_inode);
 }
 
-static ssize_t yaffs_getxattr(struct dentry * dentry, const char *name, void *buff,
-		       size_t size)
+static struct dentry *yaffs2_fh_to_parent(struct super_block *sb,
+					  struct fid *fid, int fh_len,
+					  int fh_type)
 {
-	struct inode *inode = dentry->d_inode;
-	int error = 0;
-	struct yaffs_dev *dev;
-	struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
-
-	yaffs_trace(YAFFS_TRACE_OS,
-		"yaffs_getxattr \"%s\" from object %d",
-		name, obj->obj_id);
-
-	if (error == 0) {
-		dev = obj->my_dev;
-		yaffs_gross_lock(dev);
-		error = yaffs_get_xattrib(obj, name, buff, size);
-		yaffs_gross_unlock(dev);
-
-	}
-	yaffs_trace(YAFFS_TRACE_OS, "yaffs_getxattr done returning %d", error);
-
-	return error;
+	return generic_fh_to_parent(sb, fid, fh_len, fh_type,
+				    yaffs2_nfs_get_inode);
 }
 
-static int yaffs_removexattr(struct dentry *dentry, const char *name)
+struct dentry *yaffs2_get_parent(struct dentry *dentry)
 {
-	struct inode *inode = dentry->d_inode;
-	int error = 0;
-	struct yaffs_dev *dev;
-	struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
 
-	yaffs_trace(YAFFS_TRACE_OS,
-		"yaffs_removexattr of object %d", obj->obj_id);
+	struct super_block *sb = dentry->d_inode->i_sb;
+	struct dentry *parent = ERR_PTR(-ENOENT);
+	struct inode *inode;
+	unsigned long parent_ino;
+	struct yaffs_obj *d_obj;
+	struct yaffs_obj *parent_obj;
 
-	if (error == 0) {
-		int result;
-		dev = obj->my_dev;
-		yaffs_gross_lock(dev);
-		result = yaffs_remove_xattrib(obj, name);
-		if (result == YAFFS_OK)
-			error = 0;
-		else if (result < 0)
-			error = result;
-		yaffs_gross_unlock(dev);
+	d_obj = yaffs_inode_to_obj(dentry->d_inode);
 
+	if (d_obj) {
+		parent_obj = d_obj->parent;
+		if (parent_obj) {
+			parent_ino = yaffs_get_obj_inode(parent_obj);
+			inode = Y_IGET(sb, parent_ino);
+
+			if (IS_ERR(inode)) {
+				parent = ERR_CAST(inode);
+			} else {
+				parent = d_obtain_alias(inode);
+				if (!IS_ERR(parent)) {
+					parent = ERR_PTR(-ENOMEM);
+					iput(inode);
+				}
+			}
+		}
 	}
-	yaffs_trace(YAFFS_TRACE_OS,
-		"yaffs_removexattr done returning %d", error);
 
-	return error;
+	return parent;
 }
 
-static ssize_t yaffs_listxattr(struct dentry * dentry, char *buff, size_t size)
-{
-	struct inode *inode = dentry->d_inode;
-	int error = 0;
-	struct yaffs_dev *dev;
-	struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
-
-	yaffs_trace(YAFFS_TRACE_OS,
-		"yaffs_listxattr of object %d", obj->obj_id);
-
-	if (error == 0) {
-		dev = obj->my_dev;
-		yaffs_gross_lock(dev);
-		error = yaffs_list_xattrib(obj, buff, size);
-		yaffs_gross_unlock(dev);
-
-	}
-	yaffs_trace(YAFFS_TRACE_OS,
-		"yaffs_listxattr done returning %d", error);
+/* Just declare a zero structure as a NULL value implies
+ * using the default functions of exportfs.
+ */
 
-	return error;
-}
+static struct export_operations yaffs_export_ops = {
+	.fh_to_dentry = yaffs2_fh_to_dentry,
+	.fh_to_parent = yaffs2_fh_to_parent,
+	.get_parent = yaffs2_get_parent,
+};
 
 #endif
 
-static const struct inode_operations yaffs_dir_inode_operations = {
-	.create = yaffs_create,
-	.lookup = yaffs_lookup,
-	.link = yaffs_link,
-	.unlink = yaffs_unlink,
-	.symlink = yaffs_symlink,
-	.mkdir = yaffs_mkdir,
-	.rmdir = yaffs_unlink,
-	.mknod = yaffs_mknod,
-	.rename = yaffs_rename,
-	.setattr = yaffs_setattr,
-#ifdef CONFIG_YAFFS_XATTR
-	.setxattr = yaffs_setxattr,
-	.getxattr = yaffs_getxattr,
-	.listxattr = yaffs_listxattr,
-	.removexattr = yaffs_removexattr,
-#endif
-};
 /*-----------------------------------------------------------------*/
 /* Directory search context allows us to unlock access to yaffs during
  * filldir without causing problems with the directory being modified.
@@ -786,231 +695,13 @@ static void yaffs_remove_obj_callback(struct yaffs_obj *obj)
 	 * the search context to the next object to prevent a hanging pointer.
 	 */
 	list_for_each(i, search_contexts) {
-		if (i) {
-			sc = list_entry(i, struct yaffs_search_context, others);
-			if (sc->next_return == obj)
-				yaffs_search_advance(sc);
-		}
+		sc = list_entry(i, struct yaffs_search_context, others);
+		if (sc->next_return == obj)
+			yaffs_search_advance(sc);
 	}
 
 }
 
-static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir)
-{
-	struct yaffs_obj *obj;
-	struct yaffs_dev *dev;
-	struct yaffs_search_context *sc;
-	struct inode *inode = f->f_dentry->d_inode;
-	unsigned long offset, curoffs;
-	struct yaffs_obj *l;
-	int ret_val = 0;
-
-	char name[YAFFS_MAX_NAME_LENGTH + 1];
-
-	obj = yaffs_dentry_to_obj(f->f_dentry);
-	dev = obj->my_dev;
-
-	yaffs_gross_lock(dev);
-
-	yaffs_dev_to_lc(dev)->readdir_process = current;
-
-	offset = f->f_pos;
-
-	sc = yaffs_new_search(obj);
-	if (!sc) {
-		ret_val = -ENOMEM;
-		goto out;
-	}
-
-	yaffs_trace(YAFFS_TRACE_OS,
-		"yaffs_readdir: starting at %d", (int)offset);
-
-	if (offset == 0) {
-		yaffs_trace(YAFFS_TRACE_OS,
-			"yaffs_readdir: entry . ino %d",
-			(int)inode->i_ino);
-		yaffs_gross_unlock(dev);
-		if (filldir(dirent, ".", 1, offset, inode->i_ino, DT_DIR) < 0) {
-			yaffs_gross_lock(dev);
-			goto out;
-		}
-		yaffs_gross_lock(dev);
-		offset++;
-		f->f_pos++;
-	}
-	if (offset == 1) {
-		yaffs_trace(YAFFS_TRACE_OS,
-			"yaffs_readdir: entry .. ino %d",
-			(int)f->f_dentry->d_parent->d_inode->i_ino);
-		yaffs_gross_unlock(dev);
-		if (filldir(dirent, "..", 2, offset,
-			    f->f_dentry->d_parent->d_inode->i_ino,
-			    DT_DIR) < 0) {
-			yaffs_gross_lock(dev);
-			goto out;
-		}
-		yaffs_gross_lock(dev);
-		offset++;
-		f->f_pos++;
-	}
-
-	curoffs = 1;
-
-	/* If the directory has changed since the open or last call to
-	   readdir, rewind to after the 2 canned entries. */
-	if (f->f_version != inode->i_version) {
-		offset = 2;
-		f->f_pos = offset;
-		f->f_version = inode->i_version;
-	}
-
-	while (sc->next_return) {
-		curoffs++;
-		l = sc->next_return;
-		if (curoffs >= offset) {
-			int this_inode = yaffs_get_obj_inode(l);
-			int this_type = yaffs_get_obj_type(l);
-
-			yaffs_get_obj_name(l, name, YAFFS_MAX_NAME_LENGTH + 1);
-			yaffs_trace(YAFFS_TRACE_OS,
-				"yaffs_readdir: %s inode %d",
-				name, yaffs_get_obj_inode(l));
-
-			yaffs_gross_unlock(dev);
-
-			if (filldir(dirent,
-				    name,
-				    strlen(name),
-				    offset, this_inode, this_type) < 0) {
-				yaffs_gross_lock(dev);
-				goto out;
-			}
-
-			yaffs_gross_lock(dev);
-
-			offset++;
-			f->f_pos++;
-		}
-		yaffs_search_advance(sc);
-	}
-
-out:
-	yaffs_search_end(sc);
-	yaffs_dev_to_lc(dev)->readdir_process = NULL;
-	yaffs_gross_unlock(dev);
-
-	return ret_val;
-}
-
-static const struct file_operations yaffs_dir_operations = {
-	.read = generic_read_dir,
-	.readdir = yaffs_readdir,
-	.fsync = yaffs_sync_object,
-	.llseek = generic_file_llseek,
-};
-
-
-
-static int yaffs_file_flush(struct file *file, fl_owner_t id)
-{
-	struct yaffs_obj *obj = yaffs_dentry_to_obj(file->f_dentry);
-
-	struct yaffs_dev *dev = obj->my_dev;
-
-	yaffs_trace(YAFFS_TRACE_OS,
-	  	"yaffs_file_flush object %d (%s)",
-		obj->obj_id, obj->dirty ? "dirty" : "clean");
-
-	yaffs_gross_lock(dev);
-
-	yaffs_flush_file(obj, 1, 0);
-
-	yaffs_gross_unlock(dev);
-
-	return 0;
-}
-
-static const struct file_operations yaffs_file_operations = {
-	.read = do_sync_read,
-	.write = do_sync_write,
-	.aio_read = generic_file_aio_read,
-	.aio_write = generic_file_aio_write,
-	.mmap = generic_file_mmap,
-	.flush = yaffs_file_flush,
-	.fsync = yaffs_sync_object,
-	.splice_read = generic_file_splice_read,
-	.splice_write = generic_file_splice_write,
-	.llseek = generic_file_llseek,
-};
-
-
-/* ExportFS support */
-static struct inode *yaffs2_nfs_get_inode(struct super_block *sb, uint64_t ino,
-					  uint32_t generation)
-{
-	return yaffs_iget(sb, ino);
-}
-
-static struct dentry *yaffs2_fh_to_dentry(struct super_block *sb,
-					  struct fid *fid, int fh_len,
-					  int fh_type)
-{
-	return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
-				    yaffs2_nfs_get_inode);
-}
-
-static struct dentry *yaffs2_fh_to_parent(struct super_block *sb,
-					  struct fid *fid, int fh_len,
-					  int fh_type)
-{
-	return generic_fh_to_parent(sb, fid, fh_len, fh_type,
-				    yaffs2_nfs_get_inode);
-}
-
-struct dentry *yaffs2_get_parent(struct dentry *dentry)
-{
-
-	struct super_block *sb = dentry->d_inode->i_sb;
-	struct dentry *parent = ERR_PTR(-ENOENT);
-	struct inode *inode;
-	unsigned long parent_ino;
-	struct yaffs_obj *d_obj;
-	struct yaffs_obj *parent_obj;
-
-	d_obj = yaffs_inode_to_obj(dentry->d_inode);
-
-	if (d_obj) {
-		parent_obj = d_obj->parent;
-		if (parent_obj) {
-			parent_ino = yaffs_get_obj_inode(parent_obj);
-			inode = yaffs_iget(sb, parent_ino);
-
-			if (IS_ERR(inode)) {
-				parent = ERR_CAST(inode);
-			} else {
-				parent = d_obtain_alias(inode);
-				if (!IS_ERR(parent)) {
-					parent = ERR_PTR(-ENOMEM);
-					iput(inode);
-				}
-			}
-		}
-	}
-
-	return parent;
-}
-
-/* Just declare a zero structure as a NULL value implies
- * using the default functions of exportfs.
- */
-
-static struct export_operations yaffs_export_ops = {
-	.fh_to_dentry = yaffs2_fh_to_dentry,
-	.fh_to_parent = yaffs2_fh_to_parent,
-	.get_parent = yaffs2_get_parent,
-};
-
-
 /*-----------------------------------------------------------------*/
 
 static int yaffs_readlink(struct dentry *dentry, char __user * buffer,
@@ -1035,10 +726,17 @@ static int yaffs_readlink(struct dentry *dentry, char __user * buffer,
 	return ret;
 }
 
+#if (YAFFS_NEW_FOLLOW_LINK == 1)
 static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
 {
-	unsigned char *alias;
 	void *ret;
+#else
+static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
+{
+	int ret
+#endif
+	unsigned char *alias;
+	int ret_int = 0;
 	struct yaffs_dev *dev = yaffs_dentry_to_obj(dentry)->my_dev;
 
 	yaffs_gross_lock(dev);
@@ -1047,21 +745,96 @@ static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
 	yaffs_gross_unlock(dev);
 
 	if (!alias) {
-		ret = ERR_PTR(-ENOMEM);
+		ret_int = -ENOMEM;
 		goto out;
 	}
-
+#if (YAFFS_NEW_FOLLOW_LINK == 1)
 	nd_set_link(nd, alias);
-	ret = (void *)alias;
+	ret = alias;
 out:
+	if (ret_int)
+		ret = ERR_PTR(ret_int);
 	return ret;
+#else
+	ret = vfs_follow_link(nd, alias);
+	kfree(alias);
+out:
+	if (ret_int)
+		ret = ret_int;
+	return ret;
+#endif
 }
 
+#if (YAFFS_NEW_FOLLOW_LINK == 1)
 void yaffs_put_link(struct dentry *dentry, struct nameidata *nd, void *alias)
 {
 	kfree(alias);
 }
+#endif
+
+struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
+			      struct yaffs_obj *obj);
+
+/*
+ * Lookup is used to find objects in the fs
+ */
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+
+static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
+				   struct nameidata *n)
+#else
+static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry)
+#endif
+{
+	struct yaffs_obj *obj;
+	struct inode *inode = NULL;	/* NCB 2.5/2.6 needs NULL here */
 
+	struct yaffs_dev *dev = yaffs_inode_to_obj(dir)->my_dev;
+
+	if (current != yaffs_dev_to_lc(dev)->readdir_process)
+		yaffs_gross_lock(dev);
+
+	yaffs_trace(YAFFS_TRACE_OS, "yaffs_lookup for %d:%s",
+		yaffs_inode_to_obj(dir)->obj_id, dentry->d_name.name);
+
+	obj = yaffs_find_by_name(yaffs_inode_to_obj(dir), dentry->d_name.name);
+
+	obj = yaffs_get_equivalent_obj(obj);	/* in case it was a hardlink */
+
+	/* Can't hold gross lock when calling yaffs_get_inode() */
+	if (current != yaffs_dev_to_lc(dev)->readdir_process)
+		yaffs_gross_unlock(dev);
+
+	if (obj) {
+		yaffs_trace(YAFFS_TRACE_OS,
+			"yaffs_lookup found %d", obj->obj_id);
+
+		inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
+	} else {
+		yaffs_trace(YAFFS_TRACE_OS, "yaffs_lookup not found");
+
+	}
+
+/* added NCB for 2.5/6 compatability - forces add even if inode is
+ * NULL which creates dentry hash */
+	d_add(dentry, inode);
+
+	return NULL;
+}
+
+#ifdef YAFFS_HAS_PUT_INODE
+
+/* For now put inode is just for debugging
+ * Put inode is called when the inode **structure** is put.
+ */
+static void yaffs_put_inode(struct inode *inode)
+{
+	yaffs_trace(YAFFS_TRACE_OS,
+		"yaffs_put_inode: ino %d, count %d"),
+		(int)inode->i_ino, atomic_read(&inode->i_count);
+
+}
+#endif
 
 static void yaffs_unstitch_obj(struct inode *inode, struct yaffs_obj *obj)
 {
@@ -1078,6 +851,7 @@ static void yaffs_unstitch_obj(struct inode *inode, struct yaffs_obj *obj)
 	yaffs_handle_defered_free(obj);
 }
 
+#ifdef YAFFS_HAS_EVICT_INODE
 /* yaffs_evict_inode combines into one operation what was previously done in
  * yaffs_clear_inode() and yaffs_delete_inode()
  *
@@ -1092,8 +866,7 @@ static void yaffs_evict_inode(struct inode *inode)
 
 	yaffs_trace(YAFFS_TRACE_OS,
 		"yaffs_evict_inode: ino %d, count %d %s",
-		(int)inode->i_ino,
-		atomic_read(&inode->i_count),
+		(int)inode->i_ino, atomic_read(&inode->i_count),
 		obj ? "object exists" : "null object");
 
 	if (!inode->i_nlink && !is_bad_inode(inode))
@@ -1113,16 +886,87 @@ static void yaffs_evict_inode(struct inode *inode)
 		yaffs_unstitch_obj(inode, obj);
 		yaffs_gross_unlock(dev);
 	}
+}
+#else
+
+/* clear is called to tell the fs to release any per-inode data it holds.
+ * The object might still exist on disk and is just being thrown out of the cache
+ * or else the object has actually been deleted and we're being called via
+ * the chain
+ *   yaffs_delete_inode() -> clear_inode()->yaffs_clear_inode()
+ */
+
+static void yaffs_clear_inode(struct inode *inode)
+{
+	struct yaffs_obj *obj;
+	struct yaffs_dev *dev;
+
+	obj = yaffs_inode_to_obj(inode);
+
+	yaffs_trace(YAFFS_TRACE_OS,
+		"yaffs_clear_inode: ino %d, count %d %s",
+		(int)inode->i_ino, atomic_read(&inode->i_count),
+		obj ? "object exists" : "null object");
+
+	if (obj) {
+		dev = obj->my_dev;
+		yaffs_gross_lock(dev);
+		yaffs_unstitch_obj(inode, obj);
+		yaffs_gross_unlock(dev);
+	}
 
 }
 
-static void yaffs_touch_super(struct yaffs_dev *dev)
+/* delete is called when the link count is zero and the inode
+ * is put (ie. nobody wants to know about it anymore, time to
+ * delete the file).
+ * NB Must call clear_inode()
+ */
+static void yaffs_delete_inode(struct inode *inode)
 {
-	struct super_block *sb = yaffs_dev_to_lc(dev)->super;
+	struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
+	struct yaffs_dev *dev;
 
-	yaffs_trace(YAFFS_TRACE_OS, "yaffs_touch_super() sb = %p", sb);
-	if (sb)
-		sb->s_dirt = 1;
+	yaffs_trace(YAFFS_TRACE_OS,
+		"yaffs_delete_inode: ino %d, count %d %s",
+		(int)inode->i_ino, atomic_read(&inode->i_count),
+		obj ? "object exists" : "null object");
+
+	if (obj) {
+		dev = obj->my_dev;
+		yaffs_gross_lock(dev);
+		yaffs_del_obj(obj);
+		yaffs_gross_unlock(dev);
+	}
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
+	truncate_inode_pages(&inode->i_data, 0);
+#endif
+	clear_inode(inode);
+}
+#endif
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+static int yaffs_file_flush(struct file *file, fl_owner_t id)
+#else
+static int yaffs_file_flush(struct file *file)
+#endif
+{
+	struct yaffs_obj *obj = yaffs_dentry_to_obj(file->f_dentry);
+
+	struct yaffs_dev *dev = obj->my_dev;
+
+	yaffs_trace(YAFFS_TRACE_OS,
+		"yaffs_file_flush object %d (%s)",
+		obj->obj_id,
+		obj->dirty ? "dirty" : "clean");
+
+	yaffs_gross_lock(dev);
+
+	yaffs_flush_file(obj, 1, 0);
+
+	yaffs_gross_unlock(dev);
+
+	return 0;
 }
 
 static int yaffs_readpage_nolock(struct file *f, struct page *pg)
@@ -1132,27 +976,31 @@ static int yaffs_readpage_nolock(struct file *f, struct page *pg)
 	struct yaffs_obj *obj;
 	unsigned char *pg_buf;
 	int ret;
-
+	loff_t pos = ((loff_t) pg->index) << PAGE_CACHE_SHIFT;
 	struct yaffs_dev *dev;
 
 	yaffs_trace(YAFFS_TRACE_OS,
-		"yaffs_readpage_nolock at %08x, size %08x",
-		(unsigned)(pg->index << PAGE_CACHE_SHIFT),
+		"yaffs_readpage_nolock at %lld, size %08x",
+		(long long)pos,
 		(unsigned)PAGE_CACHE_SIZE);
 
 	obj = yaffs_dentry_to_obj(f->f_dentry);
 
 	dev = obj->my_dev;
 
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
 	BUG_ON(!PageLocked(pg));
+#else
+	if (!PageLocked(pg))
+		PAGE_BUG(pg);
+#endif
 
 	pg_buf = kmap(pg);
 	/* FIXME: Can kmap fail? */
 
 	yaffs_gross_lock(dev);
 
-	ret = yaffs_file_rd(obj, pg_buf,
-			    pg->index << PAGE_CACHE_SHIFT, PAGE_CACHE_SIZE);
+	ret = yaffs_file_rd(obj, pg_buf, pos, PAGE_CACHE_SIZE);
 
 	yaffs_gross_unlock(dev);
 
@@ -1193,7 +1041,11 @@ static int yaffs_readpage(struct file *f, struct page *pg)
 
 /* writepage inspired by/stolen from smbfs */
 
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
 static int yaffs_writepage(struct page *page, struct writeback_control *wbc)
+#else
+static int yaffs_writepage(struct page *page)
+#endif
 {
 	struct yaffs_dev *dev;
 	struct address_space *mapping = page->mapping;
@@ -1221,11 +1073,11 @@ static int yaffs_writepage(struct page *page, struct writeback_control *wbc)
 
 		if (page->index > end_index || !n_bytes) {
 			yaffs_trace(YAFFS_TRACE_OS,
-				"yaffs_writepage at %08x, inode size = %08x!!!",
-				(unsigned)(page->index << PAGE_CACHE_SHIFT),
-				(unsigned)inode->i_size);
+				"yaffs_writepage at %lld, inode size = %lld!!",
+				((loff_t)page->index) << PAGE_CACHE_SHIFT,
+				inode->i_size);
 			yaffs_trace(YAFFS_TRACE_OS,
-			  "                -> don't care!!");
+				"                -> don't care!!");
 
 			zero_user_segment(page, 0, PAGE_CACHE_SIZE);
 			set_page_writeback(page);
@@ -1247,20 +1099,20 @@ static int yaffs_writepage(struct page *page, struct writeback_control *wbc)
 	yaffs_gross_lock(dev);
 
 	yaffs_trace(YAFFS_TRACE_OS,
-		"yaffs_writepage at %08x, size %08x",
-		(unsigned)(page->index << PAGE_CACHE_SHIFT), n_bytes);
+		"yaffs_writepage at %lld, size %08x",
+		((loff_t)page->index) << PAGE_CACHE_SHIFT, n_bytes);
 	yaffs_trace(YAFFS_TRACE_OS,
-		"writepag0: obj = %05x, ino = %05x",
-		(int)obj->variant.file_variant.file_size, (int)inode->i_size);
+		"writepag0: obj = %lld, ino = %lld",
+		obj->variant.file_variant.file_size, inode->i_size);
 
 	n_written = yaffs_wr_file(obj, buffer,
-				  page->index << PAGE_CACHE_SHIFT, n_bytes, 0);
+				  ((loff_t)page->index) << PAGE_CACHE_SHIFT, n_bytes, 0);
 
 	yaffs_touch_super(dev);
 
 	yaffs_trace(YAFFS_TRACE_OS,
-		"writepag1: obj = %05x, ino = %05x",
-		(int)obj->variant.file_variant.file_size, (int)inode->i_size);
+		"writepag1: obj = %lld, ino = %lld",
+		obj->variant.file_variant.file_size, inode->i_size);
 
 	yaffs_gross_unlock(dev);
 
@@ -1273,47 +1125,7 @@ static int yaffs_writepage(struct page *page, struct writeback_control *wbc)
 	return (n_written == n_bytes) ? 0 : -ENOSPC;
 }
 
-/* Space holding and freeing is done to ensure we have space available for 
- * write_begin/end.
- * For now we just assume few parallel writes and check against a small
- * number.
- * Todo: need to do this with a counter to handle parallel reads better.
- */
-
-static ssize_t yaffs_hold_space(struct file *f)
-{
-	struct yaffs_obj *obj;
-	struct yaffs_dev *dev;
-
-	int n_free_chunks;
-
-	obj = yaffs_dentry_to_obj(f->f_dentry);
-
-	dev = obj->my_dev;
-
-	yaffs_gross_lock(dev);
-
-	n_free_chunks = yaffs_get_n_free_chunks(dev);
-
-	yaffs_gross_unlock(dev);
-
-	return (n_free_chunks > 20) ? 1 : 0;
-}
-
-static void yaffs_release_space(struct file *f)
-{
-	struct yaffs_obj *obj;
-	struct yaffs_dev *dev;
-
-	obj = yaffs_dentry_to_obj(f->f_dentry);
-
-	dev = obj->my_dev;
-
-	yaffs_gross_lock(dev);
-
-	yaffs_gross_unlock(dev);
-}
-
+#if (YAFFS_USE_WRITE_BEGIN_END > 0)
 static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
 			     loff_t pos, unsigned len, unsigned flags,
 			     struct page **pagep, void **fsdata)
@@ -1325,7 +1137,11 @@ static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
 	int space_held = 0;
 
 	/* Get a page */
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 28)
 	pg = grab_cache_page_write_begin(mapping, index, flags);
+#else
+	pg = __grab_cache_page(mapping, index);
+#endif
 
 	*pagep = pg;
 	if (!pg) {
@@ -1369,16 +1185,244 @@ out:
 	return ret;
 }
 
+#else
+
+static int yaffs_prepare_write(struct file *f, struct page *pg,
+			       unsigned offset, unsigned to)
+{
+	yaffs_trace(YAFFS_TRACE_OS, "yaffs_prepair_write");
+
+	if (!Page_Uptodate(pg))
+		return yaffs_readpage_nolock(f, pg);
+	return 0;
+}
+#endif
+
+#if (YAFFS_USE_WRITE_BEGIN_END > 0)
+static int yaffs_write_end(struct file *filp, struct address_space *mapping,
+			   loff_t pos, unsigned len, unsigned copied,
+			   struct page *pg, void *fsdadata)
+{
+	int ret = 0;
+	void *addr, *kva;
+	uint32_t offset_into_page = pos & (PAGE_CACHE_SIZE - 1);
+
+	kva = kmap(pg);
+	addr = kva + offset_into_page;
+
+	yaffs_trace(YAFFS_TRACE_OS,
+		"yaffs_write_end addr %p pos %lld n_bytes %d",
+		addr, pos, copied);
+
+	ret = yaffs_file_write(filp, addr, copied, &pos);
+
+	if (ret != copied) {
+		yaffs_trace(YAFFS_TRACE_OS,
+			"yaffs_write_end not same size ret %d  copied %d",
+			ret, copied);
+		SetPageError(pg);
+	}
+
+	kunmap(pg);
+
+	yaffs_release_space(filp);
+	unlock_page(pg);
+	page_cache_release(pg);
+	return ret;
+}
+#else
+
+static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
+			      unsigned to)
+{
+	void *addr, *kva;
+
+	loff_t pos = (((loff_t) pg->index) << PAGE_CACHE_SHIFT) + offset;
+	int n_bytes = to - offset;
+	int n_written;
+
+	kva = kmap(pg);
+	addr = kva + offset;
+
+	yaffs_trace(YAFFS_TRACE_OS,
+		"yaffs_commit_write addr %p pos %lld n_bytes %d",
+		addr, pos, n_bytes);
+
+	n_written = yaffs_file_write(f, addr, n_bytes, &pos);
+
+	if (n_written != n_bytes) {
+		yaffs_trace(YAFFS_TRACE_OS,
+			"yaffs_commit_write not same size n_written %d  n_bytes %d",
+			n_written, n_bytes);
+		SetPageError(pg);
+	}
+	kunmap(pg);
+
+	yaffs_trace(YAFFS_TRACE_OS,
+		"yaffs_commit_write returning %d",
+		n_written == n_bytes ? 0 : n_written);
+
+	return n_written == n_bytes ? 0 : n_written;
+}
+#endif
+
+static void yaffs_fill_inode_from_obj(struct inode *inode,
+				      struct yaffs_obj *obj)
+{
+	if (inode && obj) {
+
+		/* Check mode against the variant type and attempt to repair if broken. */
+		u32 mode = obj->yst_mode;
+		switch (obj->variant_type) {
+		case YAFFS_OBJECT_TYPE_FILE:
+			if (!S_ISREG(mode)) {
+				obj->yst_mode &= ~S_IFMT;
+				obj->yst_mode |= S_IFREG;
+			}
+
+			break;
+		case YAFFS_OBJECT_TYPE_SYMLINK:
+			if (!S_ISLNK(mode)) {
+				obj->yst_mode &= ~S_IFMT;
+				obj->yst_mode |= S_IFLNK;
+			}
+
+			break;
+		case YAFFS_OBJECT_TYPE_DIRECTORY:
+			if (!S_ISDIR(mode)) {
+				obj->yst_mode &= ~S_IFMT;
+				obj->yst_mode |= S_IFDIR;
+			}
+
+			break;
+		case YAFFS_OBJECT_TYPE_UNKNOWN:
+		case YAFFS_OBJECT_TYPE_HARDLINK:
+		case YAFFS_OBJECT_TYPE_SPECIAL:
+		default:
+			/* TODO? */
+			break;
+		}
+
+		inode->i_flags |= S_NOATIME;
+
+		inode->i_ino = obj->obj_id;
+		inode->i_mode = obj->yst_mode;
+		inode->i_uid = obj->yst_uid;
+		inode->i_gid = obj->yst_gid;
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
+		inode->i_blksize = inode->i_sb->s_blocksize;
+#endif
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+
+		inode->i_rdev = old_decode_dev(obj->yst_rdev);
+		inode->i_atime.tv_sec = (time_t) (obj->yst_atime);
+		inode->i_atime.tv_nsec = 0;
+		inode->i_mtime.tv_sec = (time_t) obj->yst_mtime;
+		inode->i_mtime.tv_nsec = 0;
+		inode->i_ctime.tv_sec = (time_t) obj->yst_ctime;
+		inode->i_ctime.tv_nsec = 0;
+#else
+		inode->i_rdev = obj->yst_rdev;
+		inode->i_atime = obj->yst_atime;
+		inode->i_mtime = obj->yst_mtime;
+		inode->i_ctime = obj->yst_ctime;
+#endif
+		inode->i_size = yaffs_get_obj_length(obj);
+		inode->i_blocks = (inode->i_size + 511) >> 9;
+
+		set_nlink(inode, yaffs_get_obj_link_count(obj));
+
+		yaffs_trace(YAFFS_TRACE_OS,
+			"yaffs_fill_inode mode %x uid %d gid %d size %lld count %d",
+			inode->i_mode, inode->i_uid, inode->i_gid,
+			inode->i_size, atomic_read(&inode->i_count));
+
+		switch (obj->yst_mode & S_IFMT) {
+		default:	/* fifo, device or socket */
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+			init_special_inode(inode, obj->yst_mode,
+					   old_decode_dev(obj->yst_rdev));
+#else
+			init_special_inode(inode, obj->yst_mode,
+					   (dev_t) (obj->yst_rdev));
+#endif
+			break;
+		case S_IFREG:	/* file */
+			inode->i_op = &yaffs_file_inode_operations;
+			inode->i_fop = &yaffs_file_operations;
+			inode->i_mapping->a_ops =
+			    &yaffs_file_address_operations;
+			break;
+		case S_IFDIR:	/* directory */
+			inode->i_op = &yaffs_dir_inode_operations;
+			inode->i_fop = &yaffs_dir_operations;
+			break;
+		case S_IFLNK:	/* symlink */
+			inode->i_op = &yaffs_symlink_inode_operations;
+			break;
+		}
+
+		yaffs_inode_to_obj_lv(inode) = obj;
+
+		obj->my_inode = inode;
+
+	} else {
+		yaffs_trace(YAFFS_TRACE_OS,
+			"yaffs_fill_inode invalid parameters");
+	}
+
+}
+
+struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
+			      struct yaffs_obj *obj)
+{
+	struct inode *inode;
+
+	if (!sb) {
+		yaffs_trace(YAFFS_TRACE_OS,
+			"yaffs_get_inode for NULL super_block!!");
+		return NULL;
+
+	}
+
+	if (!obj) {
+		yaffs_trace(YAFFS_TRACE_OS,
+			"yaffs_get_inode for NULL object!!");
+		return NULL;
+
+	}
+
+	yaffs_trace(YAFFS_TRACE_OS,
+		"yaffs_get_inode for object %d", obj->obj_id);
+
+	inode = Y_IGET(sb, obj->obj_id);
+	if (IS_ERR(inode))
+		return NULL;
+
+	/* NB Side effect: iget calls back to yaffs_read_inode(). */
+	/* iget also increments the inode's i_count */
+	/* NB You can't be holding gross_lock or deadlock will happen! */
+
+	return inode;
+}
+
 static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
 				loff_t * pos)
 {
 	struct yaffs_obj *obj;
-	int n_written, ipos;
+	int n_written;
+	loff_t ipos;
 	struct inode *inode;
 	struct yaffs_dev *dev;
 
 	obj = yaffs_dentry_to_obj(f->f_dentry);
 
+	if (!obj) {
+		yaffs_trace(YAFFS_TRACE_OS,
+			"yaffs_file_write: hey obj is null!");
+                return -EINVAL;
+        }
+
 	dev = obj->my_dev;
 
 	yaffs_gross_lock(dev);
@@ -1390,13 +1434,9 @@ static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
 	else
 		ipos = *pos;
 
-	if (!obj)
-		yaffs_trace(YAFFS_TRACE_OS,
-			"yaffs_file_write: hey obj is null!");
-	else
-		yaffs_trace(YAFFS_TRACE_OS,
-			"yaffs_file_write about to write writing %u(%x) bytes to object %d at %d(%x)",
-			(unsigned)n, (unsigned)n, obj->obj_id, ipos, ipos);
+	yaffs_trace(YAFFS_TRACE_OS,
+		"yaffs_file_write about to write writing %u(%x) bytes to object %d at %lld",
+		(unsigned)n, (unsigned)n, obj->obj_id, ipos);
 
 	n_written = yaffs_wr_file(obj, buf, ipos, n, 0);
 
@@ -1414,7 +1454,7 @@ static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
 			inode->i_blocks = (ipos + 511) >> 9;
 
 			yaffs_trace(YAFFS_TRACE_OS,
-				"yaffs_file_write size updated to %d bytes, %d blocks",
+				"yaffs_file_write size updated to %lld bytes, %d blocks",
 				ipos, (int)(inode->i_blocks));
 		}
 
@@ -1423,42 +1463,627 @@ static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
 	return (n_written == 0) && (n > 0) ? -ENOSPC : n_written;
 }
 
-static int yaffs_write_end(struct file *filp, struct address_space *mapping,
-			   loff_t pos, unsigned len, unsigned copied,
-			   struct page *pg, void *fsdadata)
+/* Space holding and freeing is done to ensure we have space available for write_begin/end */
+/* For now we just assume few parallel writes and check against a small number. */
+/* Todo: need to do this with a counter to handle parallel reads better */
+
+static ssize_t yaffs_hold_space(struct file *f)
 {
-	int ret = 0;
-	void *addr, *kva;
-	uint32_t offset_into_page = pos & (PAGE_CACHE_SIZE - 1);
+	struct yaffs_obj *obj;
+	struct yaffs_dev *dev;
 
-	kva = kmap(pg);
-	addr = kva + offset_into_page;
+	int n_free_chunks;
+
+	obj = yaffs_dentry_to_obj(f->f_dentry);
+
+	dev = obj->my_dev;
+
+	yaffs_gross_lock(dev);
+
+	n_free_chunks = yaffs_get_n_free_chunks(dev);
+
+	yaffs_gross_unlock(dev);
+
+	return (n_free_chunks > 20) ? 1 : 0;
+}
+
+static void yaffs_release_space(struct file *f)
+{
+	struct yaffs_obj *obj;
+	struct yaffs_dev *dev;
+
+	obj = yaffs_dentry_to_obj(f->f_dentry);
+
+	dev = obj->my_dev;
+
+	yaffs_gross_lock(dev);
+
+	yaffs_gross_unlock(dev);
+}
+
+static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir)
+{
+	struct yaffs_obj *obj;
+	struct yaffs_dev *dev;
+	struct yaffs_search_context *sc;
+	struct inode *inode = f->f_dentry->d_inode;
+	unsigned long offset, curoffs;
+	struct yaffs_obj *l;
+	int ret_val = 0;
+
+	char name[YAFFS_MAX_NAME_LENGTH + 1];
+
+	obj = yaffs_dentry_to_obj(f->f_dentry);
+	dev = obj->my_dev;
+
+	yaffs_gross_lock(dev);
+
+	yaffs_dev_to_lc(dev)->readdir_process = current;
+
+	offset = f->f_pos;
+
+	sc = yaffs_new_search(obj);
+	if (!sc) {
+		ret_val = -ENOMEM;
+		goto out;
+	}
 
 	yaffs_trace(YAFFS_TRACE_OS,
-		"yaffs_write_end addr %p pos %x n_bytes %d",
-		addr, (unsigned)pos, copied);
+		"yaffs_readdir: starting at %d", (int)offset);
 
-	ret = yaffs_file_write(filp, addr, copied, &pos);
+	if (offset == 0) {
+		yaffs_trace(YAFFS_TRACE_OS,
+			"yaffs_readdir: entry . ino %d",
+			(int)inode->i_ino);
+		yaffs_gross_unlock(dev);
+		if (filldir(dirent, ".", 1, offset, inode->i_ino, DT_DIR) < 0) {
+			yaffs_gross_lock(dev);
+			goto out;
+		}
+		yaffs_gross_lock(dev);
+		offset++;
+		f->f_pos++;
+	}
+	if (offset == 1) {
+		yaffs_trace(YAFFS_TRACE_OS,
+			"yaffs_readdir: entry .. ino %d",
+			(int)f->f_dentry->d_parent->d_inode->i_ino);
+		yaffs_gross_unlock(dev);
+		if (filldir(dirent, "..", 2, offset,
+			    f->f_dentry->d_parent->d_inode->i_ino,
+			    DT_DIR) < 0) {
+			yaffs_gross_lock(dev);
+			goto out;
+		}
+		yaffs_gross_lock(dev);
+		offset++;
+		f->f_pos++;
+	}
 
-	if (ret != copied) {
+	curoffs = 1;
+
+	/* If the directory has changed since the open or last call to
+	   readdir, rewind to after the 2 canned entries. */
+	if (f->f_version != inode->i_version) {
+		offset = 2;
+		f->f_pos = offset;
+		f->f_version = inode->i_version;
+	}
+
+	while (sc->next_return) {
+		curoffs++;
+		l = sc->next_return;
+		if (curoffs >= offset) {
+			int this_inode = yaffs_get_obj_inode(l);
+			int this_type = yaffs_get_obj_type(l);
+
+			yaffs_get_obj_name(l, name, YAFFS_MAX_NAME_LENGTH + 1);
+			yaffs_trace(YAFFS_TRACE_OS,
+				"yaffs_readdir: %s inode %d",
+				name, yaffs_get_obj_inode(l));
+
+			yaffs_gross_unlock(dev);
+
+			if (filldir(dirent,
+				    name,
+				    strlen(name),
+				    offset, this_inode, this_type) < 0) {
+				yaffs_gross_lock(dev);
+				goto out;
+			}
+
+			yaffs_gross_lock(dev);
+
+			offset++;
+			f->f_pos++;
+		}
+		yaffs_search_advance(sc);
+	}
+
+out:
+	yaffs_search_end(sc);
+	yaffs_dev_to_lc(dev)->readdir_process = NULL;
+	yaffs_gross_unlock(dev);
+
+	return ret_val;
+}
+
+/*
+ * File creation. Allocate an inode, and we're done..
+ */
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29)
+#define YCRED(x) x
+#else
+#define YCRED(x) (x->cred)
+#endif
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+static int yaffs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,
+		       dev_t rdev)
+#else
+static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
+		       int rdev)
+#endif
+{
+	struct inode *inode;
+
+	struct yaffs_obj *obj = NULL;
+	struct yaffs_dev *dev;
+
+	struct yaffs_obj *parent = yaffs_inode_to_obj(dir);
+
+	int error = -ENOSPC;
+	uid_t uid = YCRED(current)->fsuid;
+	gid_t gid =
+	    (dir->i_mode & S_ISGID) ? dir->i_gid : YCRED(current)->fsgid;
+
+	if ((dir->i_mode & S_ISGID) && S_ISDIR(mode))
+		mode |= S_ISGID;
+
+	if (parent) {
 		yaffs_trace(YAFFS_TRACE_OS,
-			"yaffs_write_end not same size ret %d  copied %d",
-			ret, copied);
-		SetPageError(pg);
+			"yaffs_mknod: parent object %d type %d",
+			parent->obj_id, parent->variant_type);
+	} else {
+		yaffs_trace(YAFFS_TRACE_OS,
+			"yaffs_mknod: could not get parent object");
+		return -EPERM;
 	}
 
-	kunmap(pg);
+	yaffs_trace(YAFFS_TRACE_OS,
+		"yaffs_mknod: making oject for %s, mode %x dev %x",
+		dentry->d_name.name, mode, rdev);
 
-	yaffs_release_space(filp);
-	unlock_page(pg);
-	page_cache_release(pg);
-	return ret;
+	dev = parent->my_dev;
+
+	yaffs_gross_lock(dev);
+
+	switch (mode & S_IFMT) {
+	default:
+		/* Special (socket, fifo, device...) */
+		yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod: making special");
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+		obj =
+		    yaffs_create_special(parent, dentry->d_name.name, mode, uid,
+					 gid, old_encode_dev(rdev));
+#else
+		obj =
+		    yaffs_create_special(parent, dentry->d_name.name, mode, uid,
+					 gid, rdev);
+#endif
+		break;
+	case S_IFREG:		/* file          */
+		yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod: making file");
+		obj = yaffs_create_file(parent, dentry->d_name.name, mode, uid,
+					gid);
+		break;
+	case S_IFDIR:		/* directory */
+		yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod: making directory");
+		obj = yaffs_create_dir(parent, dentry->d_name.name, mode,
+				       uid, gid);
+		break;
+	case S_IFLNK:		/* symlink */
+		yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod: making symlink");
+		obj = NULL;	/* Do we ever get here? */
+		break;
+	}
+
+	/* Can not call yaffs_get_inode() with gross lock held */
+	yaffs_gross_unlock(dev);
+
+	if (obj) {
+		inode = yaffs_get_inode(dir->i_sb, mode, rdev, obj);
+		d_instantiate(dentry, inode);
+		update_dir_time(dir);
+		yaffs_trace(YAFFS_TRACE_OS,
+			"yaffs_mknod created object %d count = %d",
+			obj->obj_id, atomic_read(&inode->i_count));
+		error = 0;
+		yaffs_fill_inode_from_obj(dir, parent);
+	} else {
+		yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod failed making object");
+		error = -ENOMEM;
+	}
+
+	return error;
 }
 
+static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
+{
+	int ret_val;
+	yaffs_trace(YAFFS_TRACE_OS, "yaffs_mkdir");
+	ret_val = yaffs_mknod(dir, dentry, mode | S_IFDIR, 0);
+	return ret_val;
+}
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+static int yaffs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
+			struct nameidata *n)
+#else
+static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode)
+#endif
+{
+	yaffs_trace(YAFFS_TRACE_OS, "yaffs_create");
+	return yaffs_mknod(dir, dentry, mode | S_IFREG, 0);
+}
+
+static int yaffs_unlink(struct inode *dir, struct dentry *dentry)
+{
+	int ret_val;
+
+	struct yaffs_dev *dev;
+	struct yaffs_obj *obj;
+
+	yaffs_trace(YAFFS_TRACE_OS, "yaffs_unlink %d:%s",
+		(int)(dir->i_ino), dentry->d_name.name);
+	obj = yaffs_inode_to_obj(dir);
+	dev = obj->my_dev;
+
+	yaffs_gross_lock(dev);
+
+	ret_val = yaffs_unlinker(obj, dentry->d_name.name);
+
+	if (ret_val == YAFFS_OK) {
+		inode_dec_link_count(dentry->d_inode);
+		dir->i_version++;
+		yaffs_gross_unlock(dev);
+		update_dir_time(dir);
+		return 0;
+	}
+	yaffs_gross_unlock(dev);
+	return -ENOTEMPTY;
+}
+
+/*
+ * Create a link...
+ */
+static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
+		      struct dentry *dentry)
+{
+	struct inode *inode = old_dentry->d_inode;
+	struct yaffs_obj *obj = NULL;
+	struct yaffs_obj *link = NULL;
+	struct yaffs_dev *dev;
+
+	yaffs_trace(YAFFS_TRACE_OS, "yaffs_link");
+
+	obj = yaffs_inode_to_obj(inode);
+	dev = obj->my_dev;
+
+	yaffs_gross_lock(dev);
+
+	if (!S_ISDIR(inode->i_mode))	/* Don't link directories */
+		link =
+		    yaffs_link_obj(yaffs_inode_to_obj(dir), dentry->d_name.name,
+				   obj);
+
+	if (link) {
+		set_nlink(old_dentry->d_inode, yaffs_get_obj_link_count(obj));
+		d_instantiate(dentry, old_dentry->d_inode);
+		atomic_inc(&old_dentry->d_inode->i_count);
+		yaffs_trace(YAFFS_TRACE_OS,
+			"yaffs_link link count %d i_count %d",
+			old_dentry->d_inode->i_nlink,
+			atomic_read(&old_dentry->d_inode->i_count));
+	}
+
+	yaffs_gross_unlock(dev);
+
+	if (link) {
+		update_dir_time(dir);
+		return 0;
+	}
+
+	return -EPERM;
+}
+
+static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
+			 const char *symname)
+{
+	struct yaffs_obj *obj;
+	struct yaffs_dev *dev;
+	uid_t uid = YCRED(current)->fsuid;
+	gid_t gid =
+	    (dir->i_mode & S_ISGID) ? dir->i_gid : YCRED(current)->fsgid;
+
+	yaffs_trace(YAFFS_TRACE_OS, "yaffs_symlink");
+
+	if (strnlen(dentry->d_name.name, YAFFS_MAX_NAME_LENGTH + 1) >
+				YAFFS_MAX_NAME_LENGTH)
+		return -ENAMETOOLONG;
+
+	if (strnlen(symname, YAFFS_MAX_ALIAS_LENGTH + 1) >
+				YAFFS_MAX_ALIAS_LENGTH)
+		return -ENAMETOOLONG;
+
+	dev = yaffs_inode_to_obj(dir)->my_dev;
+	yaffs_gross_lock(dev);
+	obj = yaffs_create_symlink(yaffs_inode_to_obj(dir), dentry->d_name.name,
+				   S_IFLNK | S_IRWXUGO, uid, gid, symname);
+	yaffs_gross_unlock(dev);
+
+	if (obj) {
+		struct inode *inode;
+
+		inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
+		d_instantiate(dentry, inode);
+		update_dir_time(dir);
+		yaffs_trace(YAFFS_TRACE_OS, "symlink created OK");
+		return 0;
+	} else {
+		yaffs_trace(YAFFS_TRACE_OS, "symlink not created");
+	}
+
+	return -ENOMEM;
+}
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 39))
+static int yaffs_sync_object(struct file *file, loff_t start, loff_t end, int datasync)
+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 34))
+static int yaffs_sync_object(struct file *file, int datasync)
+#else
+static int yaffs_sync_object(struct file *file, struct dentry *dentry,
+			     int datasync)
+#endif
+{
+
+	struct yaffs_obj *obj;
+	struct yaffs_dev *dev;
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 34))
+	struct dentry *dentry = file->f_path.dentry;
+#endif
+
+	obj = yaffs_dentry_to_obj(dentry);
+
+	dev = obj->my_dev;
+
+	yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC,
+		"yaffs_sync_object");
+	yaffs_gross_lock(dev);
+	yaffs_flush_file(obj, 1, datasync);
+	yaffs_gross_unlock(dev);
+	return 0;
+}
+
+/*
+ * The VFS layer already does all the dentry stuff for rename.
+ *
+ * NB: POSIX says you can rename an object over an old object of the same name
+ */
+static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
+			struct inode *new_dir, struct dentry *new_dentry)
+{
+	struct yaffs_dev *dev;
+	int ret_val = YAFFS_FAIL;
+	struct yaffs_obj *target;
+
+	yaffs_trace(YAFFS_TRACE_OS, "yaffs_rename");
+	dev = yaffs_inode_to_obj(old_dir)->my_dev;
+
+	yaffs_gross_lock(dev);
+
+	/* Check if the target is an existing directory that is not empty. */
+	target = yaffs_find_by_name(yaffs_inode_to_obj(new_dir),
+				    new_dentry->d_name.name);
+
+	if (target && target->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY &&
+	    !list_empty(&target->variant.dir_variant.children)) {
+
+		yaffs_trace(YAFFS_TRACE_OS, "target is non-empty dir");
+
+		ret_val = YAFFS_FAIL;
+	} else {
+		/* Now does unlinking internally using shadowing mechanism */
+		yaffs_trace(YAFFS_TRACE_OS, "calling yaffs_rename_obj");
+
+		ret_val = yaffs_rename_obj(yaffs_inode_to_obj(old_dir),
+					   old_dentry->d_name.name,
+					   yaffs_inode_to_obj(new_dir),
+					   new_dentry->d_name.name);
+	}
+	yaffs_gross_unlock(dev);
+
+	if (ret_val == YAFFS_OK) {
+		if (target)
+			inode_dec_link_count(new_dentry->d_inode);
+
+		update_dir_time(old_dir);
+		if (old_dir != new_dir)
+			update_dir_time(new_dir);
+		return 0;
+	} else {
+		return -ENOTEMPTY;
+	}
+}
+
+static int yaffs_setattr(struct dentry *dentry, struct iattr *attr)
+{
+	struct inode *inode = dentry->d_inode;
+	int error = 0;
+	struct yaffs_dev *dev;
+
+	yaffs_trace(YAFFS_TRACE_OS,
+		"yaffs_setattr of object %d",
+		yaffs_inode_to_obj(inode)->obj_id);
+#if 0
+	/* Fail if a requested resize >= 2GB */
+	if (attr->ia_valid & ATTR_SIZE && (attr->ia_size >> 31))
+		error = -EINVAL;
+#endif
+
+	if (error == 0)
+		error = inode_change_ok(inode, attr);
+	if (error == 0) {
+		int result;
+		if (!error) {
+			error = yaffs_vfs_setattr(inode, attr);
+			yaffs_trace(YAFFS_TRACE_OS, "inode_setattr called");
+			if (attr->ia_valid & ATTR_SIZE) {
+				yaffs_vfs_setsize(inode, attr->ia_size);
+				inode->i_blocks = (inode->i_size + 511) >> 9;
+			}
+		}
+		dev = yaffs_inode_to_obj(inode)->my_dev;
+		if (attr->ia_valid & ATTR_SIZE) {
+			yaffs_trace(YAFFS_TRACE_OS,
+				"resize to %d(%x)",
+				(int)(attr->ia_size),
+				(int)(attr->ia_size));
+		}
+		yaffs_gross_lock(dev);
+		result = yaffs_set_attribs(yaffs_inode_to_obj(inode), attr);
+		if (result == YAFFS_OK) {
+			error = 0;
+		} else {
+			error = -EPERM;
+		}
+		yaffs_gross_unlock(dev);
+
+	}
+
+	yaffs_trace(YAFFS_TRACE_OS, "yaffs_setattr done returning %d", error);
+
+	return error;
+}
+
+static int yaffs_setxattr(struct dentry *dentry, const char *name,
+		   const void *value, size_t size, int flags)
+{
+	struct inode *inode = dentry->d_inode;
+	int error = 0;
+	struct yaffs_dev *dev;
+	struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
+
+	yaffs_trace(YAFFS_TRACE_OS, "yaffs_setxattr of object %d", obj->obj_id);
+
+	if (error == 0) {
+		int result;
+		dev = obj->my_dev;
+		yaffs_gross_lock(dev);
+		result = yaffs_set_xattrib(obj, name, value, size, flags);
+		if (result == YAFFS_OK)
+			error = 0;
+		else if (result < 0)
+			error = result;
+		yaffs_gross_unlock(dev);
+
+	}
+	yaffs_trace(YAFFS_TRACE_OS, "yaffs_setxattr done returning %d", error);
+
+	return error;
+}
+
+static ssize_t yaffs_getxattr(struct dentry * dentry, const char *name,
+			void *buff, size_t size)
+{
+	struct inode *inode = dentry->d_inode;
+	int error = 0;
+	struct yaffs_dev *dev;
+	struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
+
+	yaffs_trace(YAFFS_TRACE_OS,
+		"yaffs_getxattr \"%s\" from object %d",
+		name, obj->obj_id);
+
+	if (error == 0) {
+		dev = obj->my_dev;
+		yaffs_gross_lock(dev);
+		error = yaffs_get_xattrib(obj, name, buff, size);
+		yaffs_gross_unlock(dev);
+
+	}
+	yaffs_trace(YAFFS_TRACE_OS, "yaffs_getxattr done returning %d", error);
+
+	return error;
+}
+
+static int yaffs_removexattr(struct dentry *dentry, const char *name)
+{
+	struct inode *inode = dentry->d_inode;
+	int error = 0;
+	struct yaffs_dev *dev;
+	struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
+
+	yaffs_trace(YAFFS_TRACE_OS,
+		"yaffs_removexattr of object %d", obj->obj_id);
+
+	if (error == 0) {
+		int result;
+		dev = obj->my_dev;
+		yaffs_gross_lock(dev);
+		result = yaffs_remove_xattrib(obj, name);
+		if (result == YAFFS_OK)
+			error = 0;
+		else if (result < 0)
+			error = result;
+		yaffs_gross_unlock(dev);
+
+	}
+	yaffs_trace(YAFFS_TRACE_OS,
+		"yaffs_removexattr done returning %d", error);
+
+	return error;
+}
+
+static ssize_t yaffs_listxattr(struct dentry * dentry, char *buff, size_t size)
+{
+	struct inode *inode = dentry->d_inode;
+	int error = 0;
+	struct yaffs_dev *dev;
+	struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
+
+	yaffs_trace(YAFFS_TRACE_OS,
+		"yaffs_listxattr of object %d", obj->obj_id);
+
+	if (error == 0) {
+		dev = obj->my_dev;
+		yaffs_gross_lock(dev);
+		error = yaffs_list_xattrib(obj, buff, size);
+		yaffs_gross_unlock(dev);
+
+	}
+	yaffs_trace(YAFFS_TRACE_OS,
+		"yaffs_listxattr done returning %d", error);
+
+	return error;
+}
+
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
 static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
 	struct yaffs_dev *dev = yaffs_dentry_to_obj(dentry)->my_dev;
 	struct super_block *sb = dentry->d_sb;
+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf)
+{
+	struct yaffs_dev *dev = yaffs_super_to_dev(sb);
+#else
+static int yaffs_statfs(struct super_block *sb, struct statfs *buf)
+{
+	struct yaffs_dev *dev = yaffs_super_to_dev(sb);
+#endif
 
 	yaffs_trace(YAFFS_TRACE_OS, "yaffs_statfs");
 
@@ -1520,14 +2145,25 @@ static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf)
 
 static void yaffs_flush_inodes(struct super_block *sb)
 {
-	struct inode *iptr;
+	struct inode *iptr, *next;
 	struct yaffs_obj *obj;
 
-	list_for_each_entry(iptr, &sb->s_inodes, i_sb_list) {
+	/*list_for_each_entry(iptr, &sb->s_inodes, i_sb_list) {*/
+	list_for_each_entry_safe(iptr,next,&sb->s_inodes, i_sb_list) {
 		obj = yaffs_inode_to_obj(iptr);
 		if (obj) {
+			struct yaffs_dev *dev = obj->my_dev;
+			/*yaffs_trace(YAFFS_TRACE_OS,
+				"flushing obj %d",
+				obj->obj_id);*/
 			yaffs_trace(YAFFS_TRACE_OS,
-				"flushing obj %d", obj->obj_id);
+			"yaffs_flush_inodes: flushing obj %d, iptr 0x%p(0x%p), dev 0x%p, sb 0x%p\n",
+			obj->obj_id, iptr, next, dev, sb);
+			if (next == iptr) {
+				yaffs_trace(YAFFS_TRACE_OS,
+				"yaffs_flush_inodes: point to self! break to next time flushing\n");
+				break;
+			}
 			yaffs_flush_file(obj, 1, 0);
 		}
 	}
@@ -1604,12 +2240,14 @@ static int yaffs_do_sync_fs(struct super_block *sb, int request_checkpoint)
  * yaffs_bg_start() launches the background thread.
  * yaffs_bg_stop() cleans up the background thread.
  *
- * NB: 
+ * NB:
  * The thread should only run after the yaffs is initialised
  * The thread should be stopped before yaffs is unmounted.
  * The thread should not do any writing while the fs is in read only.
  */
 
+#ifdef YAFFS_COMPILE_BACKGROUND
+
 void yaffs_background_waker(unsigned long data)
 {
 	wake_up_process((struct task_struct *)data);
@@ -1631,16 +2269,19 @@ static int yaffs_bg_thread_fn(void *data)
 	yaffs_trace(YAFFS_TRACE_BACKGROUND,
 		"yaffs_background starting for dev %p", (void *)dev);
 
+#ifdef YAFFS_COMPILE_FREEZER
 	set_freezable();
+#endif
 	while (context->bg_running) {
 		yaffs_trace(YAFFS_TRACE_BACKGROUND, "yaffs_background");
 
 		if (kthread_should_stop())
 			break;
 
+#ifdef YAFFS_COMPILE_FREEZER
 		if (try_to_freeze())
 			continue;
-
+#endif
 		yaffs_gross_lock(dev);
 
 		now = jiffies;
@@ -1669,6 +2310,7 @@ static int yaffs_bg_thread_fn(void *data)
                         }
 		}
 		yaffs_gross_unlock(dev);
+#if 1
 		expires = next_dir_update;
 		if (time_before(next_gc, expires))
 			expires = next_gc;
@@ -1684,6 +2326,9 @@ static int yaffs_bg_thread_fn(void *data)
 		add_timer(&timer);
 		schedule();
 		del_timer_sync(&timer);
+#else
+		msleep(10);
+#endif
 	}
 
 	return 0;
@@ -1722,20 +2367,46 @@ static void yaffs_bg_stop(struct yaffs_dev *dev)
 		ctxt->bg_thread = NULL;
 	}
 }
+#else
+static int yaffs_bg_thread_fn(void *data)
+{
+	return 0;
+}
+
+static int yaffs_bg_start(struct yaffs_dev *dev)
+{
+	return 0;
+}
 
+static void yaffs_bg_stop(struct yaffs_dev *dev)
+{
+}
+#endif
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
 static void yaffs_write_super(struct super_block *sb)
+#else
+static int yaffs_write_super(struct super_block *sb)
+#endif
 {
 	unsigned request_checkpoint = (yaffs_auto_checkpoint >= 2);
 
 	yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC | YAFFS_TRACE_BACKGROUND,
-		"yaffs_write_super%s",
+		"yaffs_write_super %s",
 		request_checkpoint ? " checkpt" : "");
 
 	yaffs_do_sync_fs(sb, request_checkpoint);
 
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 18))
+	return 0;
+#endif
 }
 
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
 static int yaffs_sync_fs(struct super_block *sb, int wait)
+#else
+static int yaffs_sync_fs(struct super_block *sb)
+#endif
 {
 	unsigned request_checkpoint = (yaffs_auto_checkpoint >= 1);
 
@@ -1747,11 +2418,123 @@ static int yaffs_sync_fs(struct super_block *sb, int wait)
 	return 0;
 }
 
+#ifdef YAFFS_USE_OWN_IGET
+
+static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino)
+{
+	struct inode *inode;
+	struct yaffs_obj *obj;
+	struct yaffs_dev *dev = yaffs_super_to_dev(sb);
+
+	yaffs_trace(YAFFS_TRACE_OS, "yaffs_iget for %lu", ino);
+
+	inode = iget_locked(sb, ino);
+	if (!inode)
+		return ERR_PTR(-ENOMEM);
+	if (!(inode->i_state & I_NEW))
+		return inode;
+
+	/* NB This is called as a side effect of other functions, but
+	 * we had to release the lock to prevent deadlocks, so
+	 * need to lock again.
+	 */
+
+	yaffs_gross_lock(dev);
+
+	obj = yaffs_find_by_number(dev, inode->i_ino);
+
+	yaffs_fill_inode_from_obj(inode, obj);
+
+	yaffs_gross_unlock(dev);
+
+	unlock_new_inode(inode);
+	return inode;
+}
+
+#else
+
+static void yaffs_read_inode(struct inode *inode)
+{
+	/* NB This is called as a side effect of other functions, but
+	 * we had to release the lock to prevent deadlocks, so
+	 * need to lock again.
+	 */
+
+	struct yaffs_obj *obj;
+	struct yaffs_dev *dev = yaffs_super_to_dev(inode->i_sb);
+
+	yaffs_trace(YAFFS_TRACE_OS,
+		"yaffs_read_inode for %d", (int)inode->i_ino);
+
+	if (current != yaffs_dev_to_lc(dev)->readdir_process)
+		yaffs_gross_lock(dev);
+
+	obj = yaffs_find_by_number(dev, inode->i_ino);
+
+	yaffs_fill_inode_from_obj(inode, obj);
+
+	if (current != yaffs_dev_to_lc(dev)->readdir_process)
+		yaffs_gross_unlock(dev);
+}
+
+#endif
 
 static LIST_HEAD(yaffs_context_list);
 struct mutex yaffs_context_lock;
 
+static void yaffs_put_super(struct super_block *sb)
+{
+	struct yaffs_dev *dev = yaffs_super_to_dev(sb);
+
+	yaffs_trace(YAFFS_TRACE_OS, "yaffs_put_super");
+
+	yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_BACKGROUND,
+		"Shutting down yaffs background thread");
+	yaffs_bg_stop(dev);
+	yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_BACKGROUND,
+		"yaffs background thread shut down");
+
+	yaffs_gross_lock(dev);
+
+	yaffs_flush_super(sb, 1);
+
+	if (yaffs_dev_to_lc(dev)->put_super_fn)
+		yaffs_dev_to_lc(dev)->put_super_fn(sb);
+
+	yaffs_deinitialise(dev);
+
+	yaffs_gross_unlock(dev);
+
+	mutex_lock(&yaffs_context_lock);
+	list_del_init(&(yaffs_dev_to_lc(dev)->context_list));
+	mutex_unlock(&yaffs_context_lock);
 
+	if (yaffs_dev_to_lc(dev)->spare_buffer) {
+		kfree(yaffs_dev_to_lc(dev)->spare_buffer);
+		yaffs_dev_to_lc(dev)->spare_buffer = NULL;
+	}
+
+	kfree(dev);
+}
+
+static void yaffs_mtd_put_super(struct super_block *sb)
+{
+	struct mtd_info *mtd = yaffs_dev_to_mtd(yaffs_super_to_dev(sb));
+
+	if (mtd->_sync)
+		mtd->_sync(mtd);
+
+	put_mtd_device(mtd);
+}
+
+static void yaffs_touch_super(struct yaffs_dev *dev)
+{
+	struct super_block *sb = yaffs_dev_to_lc(dev)->super;
+
+	yaffs_trace(YAFFS_TRACE_OS, "yaffs_touch_super() sb = %p", sb);
+	if (sb)
+		sb->s_dirt = 1;
+}
 
 struct yaffs_options {
 	int inband_tags;
@@ -1764,6 +2547,7 @@ struct yaffs_options {
 	int lazy_loading_overridden;
 	int empty_lost_and_found;
 	int empty_lost_and_found_overridden;
+	int disable_summary;
 };
 
 #define MAX_OPT_LEN 30
@@ -1805,6 +2589,8 @@ static int yaffs_parse_options(struct yaffs_options *options,
 		} else if (!strcmp(cur_opt, "lazy-loading-on")) {
 			options->lazy_loading_enabled = 1;
 			options->lazy_loading_overridden = 1;
+		} else if (!strcmp(cur_opt, "disable-summary")) {
+			options->disable_summary = 1;
 		} else if (!strcmp(cur_opt, "empty-lost-and-found-off")) {
 			options->empty_lost_and_found = 0;
 			options->empty_lost_and_found_overridden = 1;
@@ -1830,182 +2616,6 @@ static int yaffs_parse_options(struct yaffs_options *options,
 	return error;
 }
 
-static struct address_space_operations yaffs_file_address_operations = {
-	.readpage = yaffs_readpage,
-	.writepage = yaffs_writepage,
-	.write_begin = yaffs_write_begin,
-	.write_end = yaffs_write_end,
-};
-
-
-
-static const struct inode_operations yaffs_file_inode_operations = {
-	.setattr = yaffs_setattr,
-#ifdef CONFIG_YAFFS_XATTR
-	.setxattr = yaffs_setxattr,
-	.getxattr = yaffs_getxattr,
-	.listxattr = yaffs_listxattr,
-	.removexattr = yaffs_removexattr,
-#endif
-};
-
-static const struct inode_operations yaffs_symlink_inode_operations = {
-	.readlink = yaffs_readlink,
-	.follow_link = yaffs_follow_link,
-	.put_link = yaffs_put_link,
-	.setattr = yaffs_setattr,
-#ifdef CONFIG_YAFFS_XATTR
-	.setxattr = yaffs_setxattr,
-	.getxattr = yaffs_getxattr,
-	.listxattr = yaffs_listxattr,
-	.removexattr = yaffs_removexattr,
-#endif
-};
-
-static void yaffs_fill_inode_from_obj(struct inode *inode,
-				      struct yaffs_obj *obj)
-{
-	if (inode && obj) {
-
-		/* Check mode against the variant type and attempt to repair if broken. */
-		u32 mode = obj->yst_mode;
-		switch (obj->variant_type) {
-		case YAFFS_OBJECT_TYPE_FILE:
-			if (!S_ISREG(mode)) {
-				obj->yst_mode &= ~S_IFMT;
-				obj->yst_mode |= S_IFREG;
-			}
-
-			break;
-		case YAFFS_OBJECT_TYPE_SYMLINK:
-			if (!S_ISLNK(mode)) {
-				obj->yst_mode &= ~S_IFMT;
-				obj->yst_mode |= S_IFLNK;
-			}
-
-			break;
-		case YAFFS_OBJECT_TYPE_DIRECTORY:
-			if (!S_ISDIR(mode)) {
-				obj->yst_mode &= ~S_IFMT;
-				obj->yst_mode |= S_IFDIR;
-			}
-
-			break;
-		case YAFFS_OBJECT_TYPE_UNKNOWN:
-		case YAFFS_OBJECT_TYPE_HARDLINK:
-		case YAFFS_OBJECT_TYPE_SPECIAL:
-		default:
-			/* TODO? */
-			break;
-		}
-
-		inode->i_flags |= S_NOATIME;
-
-		inode->i_ino = obj->obj_id;
-		inode->i_mode = obj->yst_mode;
-		inode->i_uid = obj->yst_uid;
-		inode->i_gid = obj->yst_gid;
-
-		inode->i_rdev = old_decode_dev(obj->yst_rdev);
-
-		inode->i_atime.tv_sec = (time_t) (obj->yst_atime);
-		inode->i_atime.tv_nsec = 0;
-		inode->i_mtime.tv_sec = (time_t) obj->yst_mtime;
-		inode->i_mtime.tv_nsec = 0;
-		inode->i_ctime.tv_sec = (time_t) obj->yst_ctime;
-		inode->i_ctime.tv_nsec = 0;
-		inode->i_size = yaffs_get_obj_length(obj);
-		inode->i_blocks = (inode->i_size + 511) >> 9;
-
-		inode->i_nlink = yaffs_get_obj_link_count(obj);
-
-		yaffs_trace(YAFFS_TRACE_OS,
-			"yaffs_fill_inode mode %x uid %d gid %d size %d count %d",
-			inode->i_mode, inode->i_uid, inode->i_gid,
-			(int)inode->i_size, atomic_read(&inode->i_count));
-
-		switch (obj->yst_mode & S_IFMT) {
-		default:	/* fifo, device or socket */
-			init_special_inode(inode, obj->yst_mode,
-					   old_decode_dev(obj->yst_rdev));
-			break;
-		case S_IFREG:	/* file */
-			inode->i_op = &yaffs_file_inode_operations;
-			inode->i_fop = &yaffs_file_operations;
-			inode->i_mapping->a_ops =
-			    &yaffs_file_address_operations;
-			break;
-		case S_IFDIR:	/* directory */
-			inode->i_op = &yaffs_dir_inode_operations;
-			inode->i_fop = &yaffs_dir_operations;
-			break;
-		case S_IFLNK:	/* symlink */
-			inode->i_op = &yaffs_symlink_inode_operations;
-			break;
-		}
-
-		yaffs_inode_to_obj_lv(inode) = obj;
-
-		obj->my_inode = inode;
-
-	} else {
-		yaffs_trace(YAFFS_TRACE_OS,
-			"yaffs_fill_inode invalid parameters");
-	}
-}
-
-static void yaffs_put_super(struct super_block *sb)
-{
-	struct yaffs_dev *dev = yaffs_super_to_dev(sb);
-
-	yaffs_trace(YAFFS_TRACE_OS, "yaffs_put_super");
-
-	yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_BACKGROUND,
-		"Shutting down yaffs background thread");
-	yaffs_bg_stop(dev);
-	yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_BACKGROUND,
-		"yaffs background thread shut down");
-
-	yaffs_gross_lock(dev);
-
-	yaffs_flush_super(sb, 1);
-
-	if (yaffs_dev_to_lc(dev)->put_super_fn)
-		yaffs_dev_to_lc(dev)->put_super_fn(sb);
-
-	yaffs_deinitialise(dev);
-
-	yaffs_gross_unlock(dev);
-	mutex_lock(&yaffs_context_lock);
-	list_del_init(&(yaffs_dev_to_lc(dev)->context_list));
-	mutex_unlock(&yaffs_context_lock);
-
-	if (yaffs_dev_to_lc(dev)->spare_buffer) {
-		kfree(yaffs_dev_to_lc(dev)->spare_buffer);
-		yaffs_dev_to_lc(dev)->spare_buffer = NULL;
-	}
-
-	kfree(dev);
-}
-
-static void yaffs_mtd_put_super(struct super_block *sb)
-{
-	struct mtd_info *mtd = yaffs_dev_to_mtd(yaffs_super_to_dev(sb));
-
-	if (mtd->sync)
-		mtd->sync(mtd);
-
-	put_mtd_device(mtd);
-}
-
-static const struct super_operations yaffs_super_ops = {
-	.statfs = yaffs_statfs,
-	.put_super = yaffs_put_super,
-	.evict_inode = yaffs_evict_inode,
-	.sync_fs = yaffs_sync_fs,
-	.write_super = yaffs_write_super,
-};
-
 static struct super_block *yaffs_internal_read_super(int yaffs_version,
 						     struct super_block *sb,
 						     void *data, int silent)
@@ -2030,17 +2640,22 @@ static struct super_block *yaffs_internal_read_super(int yaffs_version,
 	struct yaffs_linux_context *context_iterator;
 	struct list_head *l;
 
+	if (!sb) {
+		printk(KERN_INFO "yaffs: sb is NULL\n");
+		return NULL;
+        }
+
 	sb->s_magic = YAFFS_MAGIC;
 	sb->s_op = &yaffs_super_ops;
 	sb->s_flags |= MS_NOATIME;
 
 	read_only = ((sb->s_flags & MS_RDONLY) != 0);
 
+#ifdef YAFFS_COMPILE_EXPORTFS
 	sb->s_export_op = &yaffs_export_ops;
+#endif
 
-	if (!sb)
-		printk(KERN_INFO "yaffs: sb is NULL\n");
-	else if (!sb->s_dev)
+	if (!sb->s_dev)
 		printk(KERN_INFO "yaffs: sb->s_dev is NULL\n");
 	else if (!yaffs_devname(sb, devname_buf))
 		printk(KERN_INFO "yaffs: devname is NULL\n");
@@ -2070,7 +2685,7 @@ static struct super_block *yaffs_internal_read_super(int yaffs_version,
 		"yaffs_read_super: block size %d", (int)(sb->s_blocksize));
 
 	yaffs_trace(YAFFS_TRACE_ALWAYS,
-		"Attempting MTD mount of %u.%u,\"%s\"",
+		"yaffs: Attempting MTD mount of %u.%u,\"%s\"",
 		MAJOR(sb->s_dev), MINOR(sb->s_dev),
 		yaffs_devname(sb, devname_buf));
 
@@ -2082,33 +2697,35 @@ static struct super_block *yaffs_internal_read_super(int yaffs_version,
 	mtd = get_mtd_device(NULL, MINOR(sb->s_dev));
 	if (!mtd) {
 		yaffs_trace(YAFFS_TRACE_ALWAYS,
-			"MTD device #%u doesn't appear to exist",
+			"yaffs: MTD device #%u doesn't appear to exist",
 			MINOR(sb->s_dev));
 		return NULL;
 	}
 	/* Check it's NAND */
 	if (mtd->type != MTD_NANDFLASH) {
 		yaffs_trace(YAFFS_TRACE_ALWAYS,
-			"MTD device is not NAND it's type %d",
+			"yaffs: MTD device is not NAND it's type %d",
 			mtd->type);
 		return NULL;
 	}
 
-	yaffs_trace(YAFFS_TRACE_OS, " erase %p", mtd->erase);
-	yaffs_trace(YAFFS_TRACE_OS, " read %p", mtd->read);
-	yaffs_trace(YAFFS_TRACE_OS, " write %p", mtd->write);
-	yaffs_trace(YAFFS_TRACE_OS, " readoob %p", mtd->read_oob);
-	yaffs_trace(YAFFS_TRACE_OS, " writeoob %p", mtd->write_oob);
-	yaffs_trace(YAFFS_TRACE_OS, " block_isbad %p", mtd->block_isbad);
-	yaffs_trace(YAFFS_TRACE_OS, " block_markbad %p", mtd->block_markbad);
+	yaffs_trace(YAFFS_TRACE_OS, " erase %p", mtd->_erase);
+	yaffs_trace(YAFFS_TRACE_OS, " read %p", mtd->_read);
+	yaffs_trace(YAFFS_TRACE_OS, " write %p", mtd->_write);
+	yaffs_trace(YAFFS_TRACE_OS, " readoob %p", mtd->_read_oob);
+	yaffs_trace(YAFFS_TRACE_OS, " writeoob %p", mtd->_write_oob);
+	yaffs_trace(YAFFS_TRACE_OS, " block_isbad %p", mtd->_block_isbad);
+	yaffs_trace(YAFFS_TRACE_OS, " block_markbad %p", mtd->_block_markbad);
 	yaffs_trace(YAFFS_TRACE_OS, " %s %d", WRITE_SIZE_STR, WRITE_SIZE(mtd));
 	yaffs_trace(YAFFS_TRACE_OS, " oobsize %d", mtd->oobsize);
 	yaffs_trace(YAFFS_TRACE_OS, " erasesize %d", mtd->erasesize);
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29)
+	yaffs_trace(YAFFS_TRACE_OS, " size %u", mtd->size);
+#else
 	yaffs_trace(YAFFS_TRACE_OS, " size %lld", mtd->size);
+#endif
 
-#ifdef CONFIG_YAFFS_AUTO_YAFFS2
-
-	if (yaffs_version == 1 && WRITE_SIZE(mtd) >= 2048) {
+	if (yaffs_auto_select && yaffs_version == 1 && WRITE_SIZE(mtd) >= 2048) {
 		yaffs_trace(YAFFS_TRACE_ALWAYS, "auto selecting yaffs2");
 		yaffs_version = 2;
 	}
@@ -2119,17 +2736,21 @@ static struct super_block *yaffs_internal_read_super(int yaffs_version,
 		yaffs_trace(YAFFS_TRACE_ALWAYS, "auto selecting yaffs1");
 		yaffs_version = 1;
 	}
-#endif
 
 	if (yaffs_version == 2) {
 		/* Check for version 2 style functions */
-		if (!mtd->erase ||
-		    !mtd->block_isbad ||
-		    !mtd->block_markbad ||
-		    !mtd->read ||
-		    !mtd->write || !mtd->read_oob || !mtd->write_oob) {
+		if (!mtd->_erase ||
+		    !mtd->_block_isbad ||
+		    !mtd->_block_markbad || !mtd->_read || !mtd->_write ||
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+		    !mtd->_read_oob || !mtd->_write_oob) {
+#else
+		    !mtd->write_ecc ||
+		    !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) {
+#endif
 			yaffs_trace(YAFFS_TRACE_ALWAYS,
-				"MTD device does not support required functions");
+				"MTD device does not support required functions"
+			);
 			return NULL;
 		}
 
@@ -2137,23 +2758,30 @@ static struct super_block *yaffs_internal_read_super(int yaffs_version,
 		     mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE) &&
 		    !options.inband_tags) {
 			yaffs_trace(YAFFS_TRACE_ALWAYS,
-				"MTD device does not have the right page sizes");
+				"MTD device does not have the right page sizes"
+			);
 			return NULL;
 		}
 	} else {
 		/* Check for V1 style functions */
-		if (!mtd->erase ||
-		    !mtd->read ||
-		    !mtd->write || !mtd->read_oob || !mtd->write_oob) {
+		if (!mtd->_erase || !mtd->_read || !mtd->_write ||
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+		    !mtd->_read_oob || !mtd->_write_oob) {
+#else
+		    !mtd->write_ecc ||
+		    !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) {
+#endif
 			yaffs_trace(YAFFS_TRACE_ALWAYS,
-				"MTD device does not support required functions");
+				"MTD device does not support required functions"
+			);
 			return NULL;
 		}
 
 		if (WRITE_SIZE(mtd) < YAFFS_BYTES_PER_CHUNK ||
 		    mtd->oobsize != YAFFS_BYTES_PER_SPARE) {
 			yaffs_trace(YAFFS_TRACE_ALWAYS,
-				"MTD device does not support have the right page sizes");
+				"MTD device does not support have the right page sizes"
+			);
 			return NULL;
 		}
 	}
@@ -2166,7 +2794,8 @@ static struct super_block *yaffs_internal_read_super(int yaffs_version,
 	if (!read_only && !(mtd->flags & MTD_WRITEABLE)) {
 		read_only = 1;
 		printk(KERN_INFO
-		       "yaffs: mtd is read only, setting superblock read only");
+		       "yaffs: mtd is read only, setting superblock read only\n"
+		);
 		sb->s_flags |= MS_RDONLY;
 	}
 
@@ -2185,7 +2814,8 @@ static struct super_block *yaffs_internal_read_super(int yaffs_version,
 	if (!dev) {
 		/* Deep shit could not allocate device structure */
 		yaffs_trace(YAFFS_TRACE_ALWAYS,
-			"yaffs_read_super failed trying to allocate yaffs_dev");
+			"yaffs_read_super: Failed trying to allocate struct yaffs_dev."
+		);
 		return NULL;
 	}
 	memset(dev, 0, sizeof(struct yaffs_dev));
@@ -2199,7 +2829,12 @@ static struct super_block *yaffs_internal_read_super(int yaffs_version,
 
 	dev->read_only = read_only;
 
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
 	sb->s_fs_info = dev;
+#else
+	sb->u.generic_sbp = dev;
+#endif
+
 
 	dev->driver_context = mtd;
 	param->name = mtd->name;
@@ -2218,40 +2853,19 @@ static struct super_block *yaffs_internal_read_super(int yaffs_version,
 	param->n_caches = (options.no_cache) ? 0 : 10;
 	param->inband_tags = options.inband_tags;
 
-#ifdef CONFIG_YAFFS_DISABLE_LAZY_LOAD
-	param->disable_lazy_load = 1;
-#endif
-#ifdef CONFIG_YAFFS_XATTR
 	param->enable_xattr = 1;
-#endif
 	if (options.lazy_loading_overridden)
 		param->disable_lazy_load = !options.lazy_loading_enabled;
 
-#ifdef CONFIG_YAFFS_DISABLE_TAGS_ECC
 	param->no_tags_ecc = 1;
-#endif
-
-#ifdef CONFIG_YAFFS_DISABLE_BACKGROUND
-#else
 	param->defered_dir_update = 1;
-#endif
 
 	if (options.tags_ecc_overridden)
 		param->no_tags_ecc = !options.tags_ecc_on;
 
-#ifdef CONFIG_YAFFS_EMPTY_LOST_AND_FOUND
 	param->empty_lost_n_found = 1;
-#endif
-
-#ifdef CONFIG_YAFFS_DISABLE_BLOCK_REFRESHING
-	param->refresh_period = 0;
-#else
 	param->refresh_period = 500;
-#endif
-
-#ifdef CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED
-	param->always_check_erased = 1;
-#endif
+	param->disable_summary = options.disable_summary;
 
 	if (options.empty_lost_and_found_overridden)
 		param->empty_lost_n_found = options.empty_lost_and_found;
@@ -2262,21 +2876,31 @@ static struct super_block *yaffs_internal_read_super(int yaffs_version,
 		param->read_chunk_tags_fn = nandmtd2_read_chunk_tags;
 		param->bad_block_fn = nandmtd2_mark_block_bad;
 		param->query_block_fn = nandmtd2_query_block;
-		yaffs_dev_to_lc(dev)->spare_buffer = 
-		                kmalloc(mtd->oobsize, GFP_NOFS);
+		yaffs_dev_to_lc(dev)->spare_buffer =
+				kmalloc(mtd->oobsize, GFP_NOFS);
 		param->is_yaffs2 = 1;
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
 		param->total_bytes_per_chunk = mtd->writesize;
 		param->chunks_per_block = mtd->erasesize / mtd->writesize;
+#else
+		param->total_bytes_per_chunk = mtd->oobblock;
+		param->chunks_per_block = mtd->erasesize / mtd->oobblock;
+#endif
 		n_blocks = YCALCBLOCKS(mtd->size, mtd->erasesize);
 
 		param->start_block = 0;
 		param->end_block = n_blocks - 1;
 	} else {
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
 		/* use the MTD interface in yaffs_mtdif1.c */
 		param->write_chunk_tags_fn = nandmtd1_write_chunk_tags;
 		param->read_chunk_tags_fn = nandmtd1_read_chunk_tags;
 		param->bad_block_fn = nandmtd1_mark_block_bad;
 		param->query_block_fn = nandmtd1_query_block;
+#else
+		param->write_chunk_fn = nandmtd_write_chunk;
+		param->read_chunk_fn = nandmtd_read_chunk;
+#endif
 		param->is_yaffs2 = 0;
 	}
 	/* ... and common functions */
@@ -2290,9 +2914,7 @@ static struct super_block *yaffs_internal_read_super(int yaffs_version,
 
 	yaffs_dev_to_lc(dev)->super = sb;
 
-#ifndef CONFIG_YAFFS_DOES_ECC
 	param->use_nand_ecc = 1;
-#endif
 
 	param->skip_checkpt_rd = options.skip_checkpoint_read;
 	param->skip_checkpt_wr = options.skip_checkpoint_write;
@@ -2336,6 +2958,8 @@ static struct super_block *yaffs_internal_read_super(int yaffs_version,
 	if (!context->bg_thread)
 		param->defered_dir_update = 0;
 
+	sb->s_maxbytes = yaffs_max_file_size(dev);
+
 	/* Release lock before yaffs_get_inode() */
 	yaffs_gross_unlock(dev);
 
@@ -2351,9 +2975,9 @@ static struct super_block *yaffs_internal_read_super(int yaffs_version,
 
 	yaffs_trace(YAFFS_TRACE_OS, "yaffs_read_super: got root inode");
 
-	root = d_alloc_root(inode);
+	root = d_make_root(inode);
 
-	yaffs_trace(YAFFS_TRACE_OS, "yaffs_read_super: d_alloc_root done");
+	yaffs_trace(YAFFS_TRACE_OS, "yaffs_read_super: d_make_root done");
 
 	if (!root) {
 		iput(inode);
@@ -2369,12 +2993,20 @@ static struct super_block *yaffs_internal_read_super(int yaffs_version,
 	return sb;
 }
 
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
 static int yaffs_internal_read_super_mtd(struct super_block *sb, void *data,
 					 int silent)
 {
 	return yaffs_internal_read_super(1, sb, data, silent) ? 0 : -EINVAL;
 }
 
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 39))
+static struct dentry *yaffs_mount(struct file_system_type *fs_type, int flags,
+        const char *dev_name, void *data)
+{
+    return mount_bdev(fs_type, flags, dev_name, data, yaffs_internal_read_super_mtd);
+}
+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
 static int yaffs_read_super(struct file_system_type *fs,
 			    int flags, const char *dev_name,
 			    void *data, struct vfsmount *mnt)
@@ -2383,23 +3015,54 @@ static int yaffs_read_super(struct file_system_type *fs,
 	return get_sb_bdev(fs, flags, dev_name, data,
 			   yaffs_internal_read_super_mtd, mnt);
 }
+#else
+static struct super_block *yaffs_read_super(struct file_system_type *fs,
+					    int flags, const char *dev_name,
+					    void *data)
+{
+
+	return get_sb_bdev(fs, flags, dev_name, data,
+			   yaffs_internal_read_super_mtd);
+}
+#endif
 
 static struct file_system_type yaffs_fs_type = {
 	.owner = THIS_MODULE,
 	.name = "yaffs",
-	.get_sb = yaffs_read_super,
-	.kill_sb = kill_block_super,
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 39))
+        .mount = yaffs_mount,
+#else
+        .get_sb = yaffs_read_super,
+#endif
+     	.kill_sb = kill_block_super,
 	.fs_flags = FS_REQUIRES_DEV,
 };
+#else
+static struct super_block *yaffs_read_super(struct super_block *sb, void *data,
+					    int silent)
+{
+	return yaffs_internal_read_super(1, sb, data, silent);
+}
+
+static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super,
+		      FS_REQUIRES_DEV);
+#endif
 
-#ifdef CONFIG_YAFFS_YAFFS2
 
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
 static int yaffs2_internal_read_super_mtd(struct super_block *sb, void *data,
 					  int silent)
 {
 	return yaffs_internal_read_super(2, sb, data, silent) ? 0 : -EINVAL;
 }
 
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 39))
+static struct dentry *yaffs2_mount(struct file_system_type *fs_type, int flags,
+        const char *dev_name, void *data)
+{
+        return mount_bdev(fs_type, flags, dev_name, data, yaffs2_internal_read_super_mtd);
+}
+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
 static int yaffs2_read_super(struct file_system_type *fs,
 			     int flags, const char *dev_name, void *data,
 			     struct vfsmount *mnt)
@@ -2407,91 +3070,115 @@ static int yaffs2_read_super(struct file_system_type *fs,
 	return get_sb_bdev(fs, flags, dev_name, data,
 			   yaffs2_internal_read_super_mtd, mnt);
 }
+#else
+static struct super_block *yaffs2_read_super(struct file_system_type *fs,
+					     int flags, const char *dev_name,
+					     void *data)
+{
+
+	return get_sb_bdev(fs, flags, dev_name, data,
+			   yaffs2_internal_read_super_mtd);
+}
+#endif
 
 static struct file_system_type yaffs2_fs_type = {
 	.owner = THIS_MODULE,
 	.name = "yaffs2",
-	.get_sb = yaffs2_read_super,
-	.kill_sb = kill_block_super,
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 39))
+        .mount = yaffs2_mount,
+#else
+        .get_sb = yaffs2_read_super,
+#endif
+     	.kill_sb = kill_block_super,
 	.fs_flags = FS_REQUIRES_DEV,
 };
-#endif /* CONFIG_YAFFS_YAFFS2 */
+#else
+static struct super_block *yaffs2_read_super(struct super_block *sb,
+					     void *data, int silent)
+{
+	return yaffs_internal_read_super(2, sb, data, silent);
+}
+
+static DECLARE_FSTYPE(yaffs2_fs_type, "yaffs2", yaffs2_read_super,
+		      FS_REQUIRES_DEV);
+#endif
+
 
 static struct proc_dir_entry *my_proc_entry;
 
 static char *yaffs_dump_dev_part0(char *buf, struct yaffs_dev *dev)
 {
 	struct yaffs_param *param = &dev->param;
-	buf += sprintf(buf, "start_block........... %d\n", param->start_block);
-	buf += sprintf(buf, "end_block............. %d\n", param->end_block);
-	buf += sprintf(buf, "total_bytes_per_chunk. %d\n",
-			param->total_bytes_per_chunk);
-	buf += sprintf(buf, "use_nand_ecc.......... %d\n",
-			param->use_nand_ecc);
-	buf += sprintf(buf, "no_tags_ecc........... %d\n", param->no_tags_ecc);
-	buf += sprintf(buf, "is_yaffs2............. %d\n", param->is_yaffs2);
-	buf += sprintf(buf, "inband_tags........... %d\n", param->inband_tags);
-	buf += sprintf(buf, "empty_lost_n_found.... %d\n",
-			param->empty_lost_n_found);
-	buf += sprintf(buf, "disable_lazy_load..... %d\n",
-			param->disable_lazy_load);
-	buf += sprintf(buf, "refresh_period........ %d\n",
-			param->refresh_period);
-	buf += sprintf(buf, "n_caches.............. %d\n", param->n_caches);
-	buf += sprintf(buf, "n_reserved_blocks..... %d\n",
-			param->n_reserved_blocks);
-	buf += sprintf(buf, "always_check_erased... %d\n",
-			param->always_check_erased);
+
+	buf += sprintf(buf, "start_block.......... %d\n", param->start_block);
+	buf += sprintf(buf, "end_block............ %d\n", param->end_block);
+	buf += sprintf(buf, "total_bytes_per_chunk %d\n",
+				param->total_bytes_per_chunk);
+	buf += sprintf(buf, "use_nand_ecc......... %d\n", param->use_nand_ecc);
+	buf += sprintf(buf, "no_tags_ecc.......... %d\n", param->no_tags_ecc);
+	buf += sprintf(buf, "is_yaffs2............ %d\n", param->is_yaffs2);
+	buf += sprintf(buf, "inband_tags.......... %d\n", param->inband_tags);
+	buf += sprintf(buf, "empty_lost_n_found... %d\n",
+				param->empty_lost_n_found);
+	buf += sprintf(buf, "disable_lazy_load.... %d\n",
+				param->disable_lazy_load);
+	buf += sprintf(buf, "refresh_period....... %d\n",
+				param->refresh_period);
+	buf += sprintf(buf, "n_caches............. %d\n", param->n_caches);
+	buf += sprintf(buf, "n_reserved_blocks.... %d\n",
+				param->n_reserved_blocks);
+	buf += sprintf(buf, "always_check_erased.. %d\n",
+				param->always_check_erased);
+	buf += sprintf(buf, "\n");
 
 	return buf;
 }
 
 static char *yaffs_dump_dev_part1(char *buf, struct yaffs_dev *dev)
 {
-	buf +=
-	    sprintf(buf, "data_bytes_per_chunk.. %d\n",
-		    dev->data_bytes_per_chunk);
-	buf += sprintf(buf, "chunk_grp_bits........ %d\n", dev->chunk_grp_bits);
-	buf += sprintf(buf, "chunk_grp_size........ %d\n", dev->chunk_grp_size);
-	buf +=
-	    sprintf(buf, "n_erased_blocks....... %d\n", dev->n_erased_blocks);
-	buf +=
-	    sprintf(buf, "blocks_in_checkpt..... %d\n", dev->blocks_in_checkpt);
+	buf += sprintf(buf, "max file size....... %lld\n",
+				(long long) yaffs_max_file_size(dev));
+	buf += sprintf(buf, "data_bytes_per_chunk. %d\n",
+				dev->data_bytes_per_chunk);
+	buf += sprintf(buf, "chunk_grp_bits....... %d\n", dev->chunk_grp_bits);
+	buf += sprintf(buf, "chunk_grp_size....... %d\n", dev->chunk_grp_size);
+	buf += sprintf(buf, "n_erased_blocks...... %d\n", dev->n_erased_blocks);
+	buf += sprintf(buf, "blocks_in_checkpt.... %d\n",
+				dev->blocks_in_checkpt);
 	buf += sprintf(buf, "\n");
-	buf += sprintf(buf, "n_tnodes.............. %d\n", dev->n_tnodes);
-	buf += sprintf(buf, "n_obj................. %d\n", dev->n_obj);
-	buf += sprintf(buf, "n_free_chunks......... %d\n", dev->n_free_chunks);
+	buf += sprintf(buf, "n_tnodes............. %d\n", dev->n_tnodes);
+	buf += sprintf(buf, "n_obj................ %d\n", dev->n_obj);
+	buf += sprintf(buf, "n_free_chunks........ %d\n", dev->n_free_chunks);
 	buf += sprintf(buf, "\n");
-	buf += sprintf(buf, "n_page_writes......... %u\n", dev->n_page_writes);
-	buf += sprintf(buf, "n_page_reads.......... %u\n", dev->n_page_reads);
-	buf += sprintf(buf, "n_erasures............ %u\n", dev->n_erasures);
-	buf += sprintf(buf, "n_gc_copies........... %u\n", dev->n_gc_copies);
-	buf += sprintf(buf, "all_gcs............... %u\n", dev->all_gcs);
-	buf +=
-	    sprintf(buf, "passive_gc_count...... %u\n", dev->passive_gc_count);
-	buf +=
-	    sprintf(buf, "oldest_dirty_gc_count. %u\n",
-		    dev->oldest_dirty_gc_count);
-	buf += sprintf(buf, "n_gc_blocks........... %u\n", dev->n_gc_blocks);
-	buf += sprintf(buf, "bg_gcs................ %u\n", dev->bg_gcs);
-	buf +=
-	    sprintf(buf, "n_retired_writes...... %u\n", dev->n_retired_writes);
-	buf +=
-	    sprintf(buf, "n_retired_blocks...... %u\n", dev->n_retired_blocks);
-	buf += sprintf(buf, "n_ecc_fixed........... %u\n", dev->n_ecc_fixed);
-	buf += sprintf(buf, "n_ecc_unfixed......... %u\n", dev->n_ecc_unfixed);
-	buf +=
-	    sprintf(buf, "n_tags_ecc_fixed...... %u\n", dev->n_tags_ecc_fixed);
-	buf +=
-	    sprintf(buf, "n_tags_ecc_unfixed.... %u\n",
-		    dev->n_tags_ecc_unfixed);
-	buf += sprintf(buf, "cache_hits............ %u\n", dev->cache_hits);
-	buf +=
-	    sprintf(buf, "n_deleted_files....... %u\n", dev->n_deleted_files);
-	buf +=
-	    sprintf(buf, "n_unlinked_files...... %u\n", dev->n_unlinked_files);
-	buf += sprintf(buf, "refresh_count......... %u\n", dev->refresh_count);
-	buf += sprintf(buf, "n_bg_deletions........ %u\n", dev->n_bg_deletions);
+	buf += sprintf(buf, "n_page_writes........ %u\n", dev->n_page_writes);
+	buf += sprintf(buf, "n_page_reads......... %u\n", dev->n_page_reads);
+	buf += sprintf(buf, "n_erasures........... %u\n", dev->n_erasures);
+	buf += sprintf(buf, "n_gc_copies.......... %u\n", dev->n_gc_copies);
+	buf += sprintf(buf, "all_gcs.............. %u\n", dev->all_gcs);
+	buf += sprintf(buf, "passive_gc_count..... %u\n",
+				dev->passive_gc_count);
+	buf += sprintf(buf, "oldest_dirty_gc_count %u\n",
+				dev->oldest_dirty_gc_count);
+	buf += sprintf(buf, "n_gc_blocks.......... %u\n", dev->n_gc_blocks);
+	buf += sprintf(buf, "bg_gcs............... %u\n", dev->bg_gcs);
+	buf += sprintf(buf, "n_retried_writes..... %u\n",
+				dev->n_retried_writes);
+	buf += sprintf(buf, "n_retired_blocks..... %u\n",
+				dev->n_retired_blocks);
+	buf += sprintf(buf, "n_ecc_fixed.......... %u\n", dev->n_ecc_fixed);
+	buf += sprintf(buf, "n_ecc_unfixed........ %u\n", dev->n_ecc_unfixed);
+	buf += sprintf(buf, "n_tags_ecc_fixed..... %u\n",
+				dev->n_tags_ecc_fixed);
+	buf += sprintf(buf, "n_tags_ecc_unfixed... %u\n",
+				dev->n_tags_ecc_unfixed);
+	buf += sprintf(buf, "cache_hits........... %u\n", dev->cache_hits);
+	buf += sprintf(buf, "n_deleted_files...... %u\n", dev->n_deleted_files);
+	buf += sprintf(buf, "n_unlinked_files..... %u\n",
+				dev->n_unlinked_files);
+	buf += sprintf(buf, "refresh_count........ %u\n", dev->refresh_count);
+	buf += sprintf(buf, "n_bg_deletions....... %u\n", dev->n_bg_deletions);
+	buf += sprintf(buf, "tags_used............ %u\n", dev->tags_used);
+	buf += sprintf(buf, "summary_used......... %u\n", dev->summary_used);
 
 	return buf;
 }
@@ -2515,7 +3202,10 @@ static int yaffs_proc_read(char *page,
 
 	/* Print header first */
 	if (step == 0)
-		buf += sprintf(buf, "YAFFS built:" __DATE__ " " __TIME__ "\n");
+		buf +=
+		    sprintf(buf,
+			    "Multi-version YAFFS built:" __DATE__ " " __TIME__
+			    "\n");
 	else if (step == 1)
 		buf += sprintf(buf, "\n");
 	else {
@@ -2551,7 +3241,6 @@ static int yaffs_proc_read(char *page,
 	return buf - page < count ? buf - page : count;
 }
 
-
 /**
  * Set the verbosity of the warnings and error messages.
  *
@@ -2562,7 +3251,7 @@ static struct {
 	char *mask_name;
 	unsigned mask_bitfield;
 } mask_flags[] = {
-	{"allocate", YAFFS_TRACE_ALLOCATE}, 
+	{"allocate", YAFFS_TRACE_ALLOCATE},
 	{"always", YAFFS_TRACE_ALWAYS},
 	{"background", YAFFS_TRACE_BACKGROUND},
 	{"bad_blocks", YAFFS_TRACE_BAD_BLOCKS},
@@ -2716,11 +3405,6 @@ static int __init init_yaffs_fs(void)
 	yaffs_trace(YAFFS_TRACE_ALWAYS,
 		"yaffs built " __DATE__ " " __TIME__ " Installing.");
 
-#ifdef CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED
-	yaffs_trace(YAFFS_TRACE_ALWAYS,
-		"\n\nYAFFS-WARNING CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED selected.\n\n\n");
-#endif
-
 	mutex_init(&yaffs_context_lock);
 
 	/* Install the proc_fs entries */
@@ -2735,7 +3419,6 @@ static int __init init_yaffs_fs(void)
 		return -ENOMEM;
         }
 
-
 	/* Now add the file system entries */
 
 	fsinst = fs_to_install;
@@ -2788,5 +3471,5 @@ module_init(init_yaffs_fs)
     module_exit(exit_yaffs_fs)
 
     MODULE_DESCRIPTION("YAFFS2 - a NAND specific flash file system");
-MODULE_AUTHOR("Charles Manning, Aleph One Ltd., 2002-2010");
+MODULE_AUTHOR("Charles Manning, Aleph One Ltd., 2002-2011");
 MODULE_LICENSE("GPL");