Moved, renamed, and deleted files

The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.

1 files changed, 0 insertions, 1619 deletions

diff --git a/ANDROID_3.4.5/fs/fat/inode.c b/ANDROID_3.4.5/fs/fat/inode.c
deleted file mode 100644
index d403f76c..00000000
--- a/ANDROID_3.4.5/fs/fat/inode.c
+++ /dev/null
@@ -1,1619 +0,0 @@
-/*
- *  linux/fs/fat/inode.c
- *
- *  Written 1992,1993 by Werner Almesberger
- *  VFAT extensions by Gordon Chaffee, merged with msdos fs by Henrik Storner
- *  Rewritten for the constant inumbers support by Al Viro
- *
- *  Fixes:
- *
- *	Max Cohan: Fixed invalid FSINFO offset when info_sector is 0
- */
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/time.h>
-#include <linux/slab.h>
-#include <linux/seq_file.h>
-#include <linux/pagemap.h>
-#include <linux/mpage.h>
-#include <linux/buffer_head.h>
-#include <linux/exportfs.h>
-#include <linux/mount.h>
-#include <linux/vfs.h>
-#include <linux/parser.h>
-#include <linux/uio.h>
-#include <linux/writeback.h>
-#include <linux/log2.h>
-#include <linux/hash.h>
-#include <asm/unaligned.h>
-#include "fat.h"
-
-#ifndef CONFIG_FAT_DEFAULT_IOCHARSET
-/* if user don't select VFAT, this is undefined. */
-#define CONFIG_FAT_DEFAULT_IOCHARSET	""
-#endif
-
-static int fat_default_codepage = CONFIG_FAT_DEFAULT_CODEPAGE;
-static char fat_default_iocharset[] = CONFIG_FAT_DEFAULT_IOCHARSET;
-
-
-static int fat_add_cluster(struct inode *inode)
-{
-	int err, cluster;
-
-	err = fat_alloc_clusters(inode, &cluster, 1);
-	if (err)
-		return err;
-	/* FIXME: this cluster should be added after data of this
-	 * cluster is writed */
-	err = fat_chain_add(inode, cluster, 1);
-	if (err)
-		fat_free_clusters(inode, cluster);
-	return err;
-}
-
-static inline int __fat_get_block(struct inode *inode, sector_t iblock,
-				  unsigned long *max_blocks,
-				  struct buffer_head *bh_result, int create)
-{
-	struct super_block *sb = inode->i_sb;
-	struct msdos_sb_info *sbi = MSDOS_SB(sb);
-	unsigned long mapped_blocks;
-	sector_t phys;
-	int err, offset;
-
-	err = fat_bmap(inode, iblock, &phys, &mapped_blocks, create);
-	if (err)
-		return err;
-	if (phys) {
-		map_bh(bh_result, sb, phys);
-		*max_blocks = min(mapped_blocks, *max_blocks);
-		return 0;
-	}
-	if (!create)
-		return 0;
-
-	if (iblock != MSDOS_I(inode)->mmu_private >> sb->s_blocksize_bits) {
-		fat_fs_error(sb, "corrupted file size (i_pos %lld, %lld)",
-			MSDOS_I(inode)->i_pos, MSDOS_I(inode)->mmu_private);
-		return -EIO;
-	}
-
-	offset = (unsigned long)iblock & (sbi->sec_per_clus - 1);
-	if (!offset) {
-		/* TODO: multiple cluster allocation would be desirable. */
-		err = fat_add_cluster(inode);
-		if (err)
-			return err;
-	}
-	/* available blocks on this cluster */
-	mapped_blocks = sbi->sec_per_clus - offset;
-
-	*max_blocks = min(mapped_blocks, *max_blocks);
-	MSDOS_I(inode)->mmu_private += *max_blocks << sb->s_blocksize_bits;
-
-	err = fat_bmap(inode, iblock, &phys, &mapped_blocks, create);
-	if (err)
-		return err;
-
-	BUG_ON(!phys);
-	BUG_ON(*max_blocks != mapped_blocks);
-	set_buffer_new(bh_result);
-	map_bh(bh_result, sb, phys);
-
-	return 0;
-}
-
-static int fat_get_block(struct inode *inode, sector_t iblock,
-			 struct buffer_head *bh_result, int create)
-{
-	struct super_block *sb = inode->i_sb;
-	unsigned long max_blocks = bh_result->b_size >> inode->i_blkbits;
-	int err;
-
-	err = __fat_get_block(inode, iblock, &max_blocks, bh_result, create);
-	if (err)
-		return err;
-	bh_result->b_size = max_blocks << sb->s_blocksize_bits;
-	return 0;
-}
-
-static int fat_writepage(struct page *page, struct writeback_control *wbc)
-{
-	return block_write_full_page(page, fat_get_block, wbc);
-}
-
-static int fat_writepages(struct address_space *mapping,
-			  struct writeback_control *wbc)
-{
-	return mpage_writepages(mapping, wbc, fat_get_block);
-}
-
-static int fat_readpage(struct file *file, struct page *page)
-{
-	return mpage_readpage(page, fat_get_block);
-}
-
-static int fat_readpages(struct file *file, struct address_space *mapping,
-			 struct list_head *pages, unsigned nr_pages)
-{
-	return mpage_readpages(mapping, pages, nr_pages, fat_get_block);
-}
-
-static void fat_write_failed(struct address_space *mapping, loff_t to)
-{
-	struct inode *inode = mapping->host;
-
-	if (to > inode->i_size) {
-		truncate_pagecache(inode, to, inode->i_size);
-		fat_truncate_blocks(inode, inode->i_size);
-	}
-}
-
-static int fat_write_begin(struct file *file, struct address_space *mapping,
-			loff_t pos, unsigned len, unsigned flags,
-			struct page **pagep, void **fsdata)
-{
-	int err;
-
-	*pagep = NULL;
-	err = cont_write_begin(file, mapping, pos, len, flags,
-				pagep, fsdata, fat_get_block,
-				&MSDOS_I(mapping->host)->mmu_private);
-	if (err < 0)
-		fat_write_failed(mapping, pos + len);
-	return err;
-}
-
-static int fat_write_end(struct file *file, struct address_space *mapping,
-			loff_t pos, unsigned len, unsigned copied,
-			struct page *pagep, void *fsdata)
-{
-	struct inode *inode = mapping->host;
-	int err;
-	err = generic_write_end(file, mapping, pos, len, copied, pagep, fsdata);
-	if (err < len)
-		fat_write_failed(mapping, pos + len);
-	if (!(err < 0) && !(MSDOS_I(inode)->i_attrs & ATTR_ARCH)) {
-		inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
-		MSDOS_I(inode)->i_attrs |= ATTR_ARCH;
-		mark_inode_dirty(inode);
-	}
-	return err;
-}
-
-static ssize_t fat_direct_IO(int rw, struct kiocb *iocb,
-			     const struct iovec *iov,
-			     loff_t offset, unsigned long nr_segs)
-{
-	struct file *file = iocb->ki_filp;
-	struct address_space *mapping = file->f_mapping;
-	struct inode *inode = mapping->host;
-	ssize_t ret;
-
-	if (rw == WRITE) {
-		/*
-		 * FIXME: blockdev_direct_IO() doesn't use ->write_begin(),
-		 * so we need to update the ->mmu_private to block boundary.
-		 *
-		 * But we must fill the remaining area or hole by nul for
-		 * updating ->mmu_private.
-		 *
-		 * Return 0, and fallback to normal buffered write.
-		 */
-		loff_t size = offset + iov_length(iov, nr_segs);
-		if (MSDOS_I(inode)->mmu_private < size)
-			return 0;
-	}
-
-	/*
-	 * FAT need to use the DIO_LOCKING for avoiding the race
-	 * condition of fat_get_block() and ->truncate().
-	 */
-	ret = blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs,
-				 fat_get_block);
-	if (ret < 0 && (rw & WRITE))
-		fat_write_failed(mapping, offset + iov_length(iov, nr_segs));
-
-	return ret;
-}
-
-static sector_t _fat_bmap(struct address_space *mapping, sector_t block)
-{
-	sector_t blocknr;
-
-	/* fat_get_cluster() assumes the requested blocknr isn't truncated. */
-	down_read(&MSDOS_I(mapping->host)->truncate_lock);
-	blocknr = generic_block_bmap(mapping, block, fat_get_block);
-	up_read(&MSDOS_I(mapping->host)->truncate_lock);
-
-	return blocknr;
-}
-
-static const struct address_space_operations fat_aops = {
-	.readpage	= fat_readpage,
-	.readpages	= fat_readpages,
-	.writepage	= fat_writepage,
-	.writepages	= fat_writepages,
-	.write_begin	= fat_write_begin,
-	.write_end	= fat_write_end,
-	.direct_IO	= fat_direct_IO,
-	.bmap		= _fat_bmap
-};
-
-/*
- * New FAT inode stuff. We do the following:
- *	a) i_ino is constant and has nothing with on-disk location.
- *	b) FAT manages its own cache of directory entries.
- *	c) *This* cache is indexed by on-disk location.
- *	d) inode has an associated directory entry, all right, but
- *		it may be unhashed.
- *	e) currently entries are stored within struct inode. That should
- *		change.
- *	f) we deal with races in the following way:
- *		1. readdir() and lookup() do FAT-dir-cache lookup.
- *		2. rename() unhashes the F-d-c entry and rehashes it in
- *			a new place.
- *		3. unlink() and rmdir() unhash F-d-c entry.
- *		4. fat_write_inode() checks whether the thing is unhashed.
- *			If it is we silently return. If it isn't we do bread(),
- *			check if the location is still valid and retry if it
- *			isn't. Otherwise we do changes.
- *		5. Spinlock is used to protect hash/unhash/location check/lookup
- *		6. fat_evict_inode() unhashes the F-d-c entry.
- *		7. lookup() and readdir() do igrab() if they find a F-d-c entry
- *			and consider negative result as cache miss.
- */
-
-static void fat_hash_init(struct super_block *sb)
-{
-	struct msdos_sb_info *sbi = MSDOS_SB(sb);
-	int i;
-
-	spin_lock_init(&sbi->inode_hash_lock);
-	for (i = 0; i < FAT_HASH_SIZE; i++)
-		INIT_HLIST_HEAD(&sbi->inode_hashtable[i]);
-}
-
-static inline unsigned long fat_hash(loff_t i_pos)
-{
-	return hash_32(i_pos, FAT_HASH_BITS);
-}
-
-void fat_attach(struct inode *inode, loff_t i_pos)
-{
-	struct msdos_sb_info *sbi = MSDOS_SB(inode->i_sb);
-	struct hlist_head *head = sbi->inode_hashtable + fat_hash(i_pos);
-
-	spin_lock(&sbi->inode_hash_lock);
-	MSDOS_I(inode)->i_pos = i_pos;
-	hlist_add_head(&MSDOS_I(inode)->i_fat_hash, head);
-	spin_unlock(&sbi->inode_hash_lock);
-}
-EXPORT_SYMBOL_GPL(fat_attach);
-
-void fat_detach(struct inode *inode)
-{
-	struct msdos_sb_info *sbi = MSDOS_SB(inode->i_sb);
-	spin_lock(&sbi->inode_hash_lock);
-	MSDOS_I(inode)->i_pos = 0;
-	hlist_del_init(&MSDOS_I(inode)->i_fat_hash);
-	spin_unlock(&sbi->inode_hash_lock);
-}
-EXPORT_SYMBOL_GPL(fat_detach);
-
-struct inode *fat_iget(struct super_block *sb, loff_t i_pos)
-{
-	struct msdos_sb_info *sbi = MSDOS_SB(sb);
-	struct hlist_head *head = sbi->inode_hashtable + fat_hash(i_pos);
-	struct hlist_node *_p;
-	struct msdos_inode_info *i;
-	struct inode *inode = NULL;
-
-	spin_lock(&sbi->inode_hash_lock);
-	hlist_for_each_entry(i, _p, head, i_fat_hash) {
-		BUG_ON(i->vfs_inode.i_sb != sb);
-		if (i->i_pos != i_pos)
-			continue;
-		inode = igrab(&i->vfs_inode);
-		if (inode)
-			break;
-	}
-	spin_unlock(&sbi->inode_hash_lock);
-	return inode;
-}
-
-static int is_exec(unsigned char *extension)
-{
-	unsigned char *exe_extensions = "EXECOMBAT", *walk;
-
-	for (walk = exe_extensions; *walk; walk += 3)
-		if (!strncmp(extension, walk, 3))
-			return 1;
-	return 0;
-}
-
-static int fat_calc_dir_size(struct inode *inode)
-{
-	struct msdos_sb_info *sbi = MSDOS_SB(inode->i_sb);
-	int ret, fclus, dclus;
-
-	inode->i_size = 0;
-	if (MSDOS_I(inode)->i_start == 0)
-		return 0;
-
-	ret = fat_get_cluster(inode, FAT_ENT_EOF, &fclus, &dclus);
-	if (ret < 0)
-		return ret;
-	inode->i_size = (fclus + 1) << sbi->cluster_bits;
-
-	return 0;
-}
-
-/* doesn't deal with root inode */
-static int fat_fill_inode(struct inode *inode, struct msdos_dir_entry *de)
-{
-	struct msdos_sb_info *sbi = MSDOS_SB(inode->i_sb);
-	int error;
-
-	MSDOS_I(inode)->i_pos = 0;
-	inode->i_uid = sbi->options.fs_uid;
-	inode->i_gid = sbi->options.fs_gid;
-	inode->i_version++;
-	inode->i_generation = get_seconds();
-
-	if ((de->attr & ATTR_DIR) && !IS_FREE(de->name)) {
-		inode->i_generation &= ~1;
-		inode->i_mode = fat_make_mode(sbi, de->attr, S_IRWXUGO);
-		inode->i_op = sbi->dir_ops;
-		inode->i_fop = &fat_dir_operations;
-
-		MSDOS_I(inode)->i_start = le16_to_cpu(de->start);
-		if (sbi->fat_bits == 32)
-			MSDOS_I(inode)->i_start |= (le16_to_cpu(de->starthi) << 16);
-
-		MSDOS_I(inode)->i_logstart = MSDOS_I(inode)->i_start;
-		error = fat_calc_dir_size(inode);
-		if (error < 0)
-			return error;
-		MSDOS_I(inode)->mmu_private = inode->i_size;
-
-		set_nlink(inode, fat_subdirs(inode));
-	} else { /* not a directory */
-		inode->i_generation |= 1;
-		inode->i_mode = fat_make_mode(sbi, de->attr,
-			((sbi->options.showexec && !is_exec(de->name + 8))
-			 ? S_IRUGO|S_IWUGO : S_IRWXUGO));
-		MSDOS_I(inode)->i_start = le16_to_cpu(de->start);
-		if (sbi->fat_bits == 32)
-			MSDOS_I(inode)->i_start |= (le16_to_cpu(de->starthi) << 16);
-
-		MSDOS_I(inode)->i_logstart = MSDOS_I(inode)->i_start;
-		inode->i_size = le32_to_cpu(de->size);
-		inode->i_op = &fat_file_inode_operations;
-		inode->i_fop = &fat_file_operations;
-		inode->i_mapping->a_ops = &fat_aops;
-		MSDOS_I(inode)->mmu_private = inode->i_size;
-	}
-	if (de->attr & ATTR_SYS) {
-		if (sbi->options.sys_immutable)
-			inode->i_flags |= S_IMMUTABLE;
-	}
-	fat_save_attrs(inode, de->attr);
-
-	inode->i_blocks = ((inode->i_size + (sbi->cluster_size - 1))
-			   & ~((loff_t)sbi->cluster_size - 1)) >> 9;
-
-	fat_time_fat2unix(sbi, &inode->i_mtime, de->time, de->date, 0);
-	if (sbi->options.isvfat) {
-		fat_time_fat2unix(sbi, &inode->i_ctime, de->ctime,
-				  de->cdate, de->ctime_cs);
-		fat_time_fat2unix(sbi, &inode->i_atime, 0, de->adate, 0);
-	} else
-		inode->i_ctime = inode->i_atime = inode->i_mtime;
-
-	return 0;
-}
-
-struct inode *fat_build_inode(struct super_block *sb,
-			struct msdos_dir_entry *de, loff_t i_pos)
-{
-	struct inode *inode;
-	int err;
-
-	inode = fat_iget(sb, i_pos);
-	if (inode)
-		goto out;
-	inode = new_inode(sb);
-	if (!inode) {
-		inode = ERR_PTR(-ENOMEM);
-		goto out;
-	}
-	inode->i_ino = iunique(sb, MSDOS_ROOT_INO);
-	inode->i_version = 1;
-	err = fat_fill_inode(inode, de);
-	if (err) {
-		iput(inode);
-		inode = ERR_PTR(err);
-		goto out;
-	}
-	fat_attach(inode, i_pos);
-	insert_inode_hash(inode);
-out:
-	return inode;
-}
-
-EXPORT_SYMBOL_GPL(fat_build_inode);
-
-static void fat_evict_inode(struct inode *inode)
-{
-	truncate_inode_pages(&inode->i_data, 0);
-	if (!inode->i_nlink) {
-		inode->i_size = 0;
-		fat_truncate_blocks(inode, 0);
-	}
-	invalidate_inode_buffers(inode);
-	end_writeback(inode);
-	fat_cache_inval_inode(inode);
-	fat_detach(inode);
-}
-
-static void fat_write_super(struct super_block *sb)
-{
-	lock_super(sb);
-	sb->s_dirt = 0;
-
-	if (!(sb->s_flags & MS_RDONLY))
-		fat_clusters_flush(sb);
-	unlock_super(sb);
-}
-
-static int fat_sync_fs(struct super_block *sb, int wait)
-{
-	int err = 0;
-
-	if (sb->s_dirt) {
-		lock_super(sb);
-		sb->s_dirt = 0;
-		err = fat_clusters_flush(sb);
-		unlock_super(sb);
-	}
-
-	return err;
-}
-
-static void fat_put_super(struct super_block *sb)
-{
-	struct msdos_sb_info *sbi = MSDOS_SB(sb);
-
-	if (sb->s_dirt)
-		fat_write_super(sb);
-
-	iput(sbi->fat_inode);
-
-	unload_nls(sbi->nls_disk);
-	unload_nls(sbi->nls_io);
-
-	if (sbi->options.iocharset != fat_default_iocharset)
-		kfree(sbi->options.iocharset);
-
-	sb->s_fs_info = NULL;
-	kfree(sbi);
-}
-
-static struct kmem_cache *fat_inode_cachep;
-
-static struct inode *fat_alloc_inode(struct super_block *sb)
-{
-	struct msdos_inode_info *ei;
-	ei = kmem_cache_alloc(fat_inode_cachep, GFP_NOFS);
-	if (!ei)
-		return NULL;
-
-	init_rwsem(&ei->truncate_lock);
-	return &ei->vfs_inode;
-}
-
-static void fat_i_callback(struct rcu_head *head)
-{
-	struct inode *inode = container_of(head, struct inode, i_rcu);
-	kmem_cache_free(fat_inode_cachep, MSDOS_I(inode));
-}
-
-static void fat_destroy_inode(struct inode *inode)
-{
-	call_rcu(&inode->i_rcu, fat_i_callback);
-}
-
-static void init_once(void *foo)
-{
-	struct msdos_inode_info *ei = (struct msdos_inode_info *)foo;
-
-	spin_lock_init(&ei->cache_lru_lock);
-	ei->nr_caches = 0;
-	ei->cache_valid_id = FAT_CACHE_VALID + 1;
-	INIT_LIST_HEAD(&ei->cache_lru);
-	INIT_HLIST_NODE(&ei->i_fat_hash);
-	inode_init_once(&ei->vfs_inode);
-}
-
-static int __init fat_init_inodecache(void)
-{
-	fat_inode_cachep = kmem_cache_create("fat_inode_cache",
-					     sizeof(struct msdos_inode_info),
-					     0, (SLAB_RECLAIM_ACCOUNT|
-						SLAB_MEM_SPREAD),
-					     init_once);
-	if (fat_inode_cachep == NULL)
-		return -ENOMEM;
-	return 0;
-}
-
-static void __exit fat_destroy_inodecache(void)
-{
-	kmem_cache_destroy(fat_inode_cachep);
-}
-
-static int fat_remount(struct super_block *sb, int *flags, char *data)
-{
-	struct msdos_sb_info *sbi = MSDOS_SB(sb);
-	*flags |= MS_NODIRATIME | (sbi->options.isvfat ? 0 : MS_NOATIME);
-	return 0;
-}
-
-static int fat_statfs(struct dentry *dentry, struct kstatfs *buf)
-{
-	struct super_block *sb = dentry->d_sb;
-	struct msdos_sb_info *sbi = MSDOS_SB(sb);
-	u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
-
-	/* If the count of free cluster is still unknown, counts it here. */
-	if (sbi->free_clusters == -1 || !sbi->free_clus_valid) {
-		int err = fat_count_free_clusters(dentry->d_sb);
-		if (err)
-			return err;
-	}
-
-	buf->f_type = dentry->d_sb->s_magic;
-	buf->f_bsize = sbi->cluster_size;
-	buf->f_blocks = sbi->max_cluster - FAT_START_ENT;
-	buf->f_bfree = sbi->free_clusters;
-	buf->f_bavail = sbi->free_clusters;
-	buf->f_fsid.val[0] = (u32)id;
-	buf->f_fsid.val[1] = (u32)(id >> 32);
-	buf->f_namelen =
-		(sbi->options.isvfat ? FAT_LFN_LEN : 12) * NLS_MAX_CHARSET_SIZE;
-
-	return 0;
-}
-
-static inline loff_t fat_i_pos_read(struct msdos_sb_info *sbi,
-				    struct inode *inode)
-{
-	loff_t i_pos;
-#if BITS_PER_LONG == 32
-	spin_lock(&sbi->inode_hash_lock);
-#endif
-	i_pos = MSDOS_I(inode)->i_pos;
-#if BITS_PER_LONG == 32
-	spin_unlock(&sbi->inode_hash_lock);
-#endif
-	return i_pos;
-}
-
-static int __fat_write_inode(struct inode *inode, int wait)
-{
-	struct super_block *sb = inode->i_sb;
-	struct msdos_sb_info *sbi = MSDOS_SB(sb);
-	struct buffer_head *bh;
-	struct msdos_dir_entry *raw_entry;
-	loff_t i_pos;
-	int err;
-
-	if (inode->i_ino == MSDOS_ROOT_INO)
-		return 0;
-
-retry:
-	i_pos = fat_i_pos_read(sbi, inode);
-	if (!i_pos)
-		return 0;
-
-	bh = sb_bread(sb, i_pos >> sbi->dir_per_block_bits);
-	if (!bh) {
-		fat_msg(sb, KERN_ERR, "unable to read inode block "
-		       "for updating (i_pos %lld)", i_pos);
-		return -EIO;
-	}
-	spin_lock(&sbi->inode_hash_lock);
-	if (i_pos != MSDOS_I(inode)->i_pos) {
-		spin_unlock(&sbi->inode_hash_lock);
-		brelse(bh);
-		goto retry;
-	}
-
-	raw_entry = &((struct msdos_dir_entry *) (bh->b_data))
-	    [i_pos & (sbi->dir_per_block - 1)];
-	if (S_ISDIR(inode->i_mode))
-		raw_entry->size = 0;
-	else
-		raw_entry->size = cpu_to_le32(inode->i_size);
-	raw_entry->attr = fat_make_attrs(inode);
-	raw_entry->start = cpu_to_le16(MSDOS_I(inode)->i_logstart);
-	raw_entry->starthi = cpu_to_le16(MSDOS_I(inode)->i_logstart >> 16);
-	fat_time_unix2fat(sbi, &inode->i_mtime, &raw_entry->time,
-			  &raw_entry->date, NULL);
-	if (sbi->options.isvfat) {
-		__le16 atime;
-		fat_time_unix2fat(sbi, &inode->i_ctime, &raw_entry->ctime,
-				  &raw_entry->cdate, &raw_entry->ctime_cs);
-		fat_time_unix2fat(sbi, &inode->i_atime, &atime,
-				  &raw_entry->adate, NULL);
-	}
-	spin_unlock(&sbi->inode_hash_lock);
-	mark_buffer_dirty(bh);
-	err = 0;
-	if (wait)
-		err = sync_dirty_buffer(bh);
-	brelse(bh);
-	return err;
-}
-
-static int fat_write_inode(struct inode *inode, struct writeback_control *wbc)
-{
-	return __fat_write_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
-}
-
-int fat_sync_inode(struct inode *inode)
-{
-	return __fat_write_inode(inode, 1);
-}
-
-EXPORT_SYMBOL_GPL(fat_sync_inode);
-
-static int fat_show_options(struct seq_file *m, struct dentry *root);
-static const struct super_operations fat_sops = {
-	.alloc_inode	= fat_alloc_inode,
-	.destroy_inode	= fat_destroy_inode,
-	.write_inode	= fat_write_inode,
-	.evict_inode	= fat_evict_inode,
-	.put_super	= fat_put_super,
-	.write_super	= fat_write_super,
-	.sync_fs	= fat_sync_fs,
-	.statfs		= fat_statfs,
-	.remount_fs	= fat_remount,
-
-	.show_options	= fat_show_options,
-};
-
-/*
- * a FAT file handle with fhtype 3 is
- *  0/  i_ino - for fast, reliable lookup if still in the cache
- *  1/  i_generation - to see if i_ino is still valid
- *          bit 0 == 0 iff directory
- *  2/  i_pos(8-39) - if ino has changed, but still in cache
- *  3/  i_pos(4-7)|i_logstart - to semi-verify inode found at i_pos
- *  4/  i_pos(0-3)|parent->i_logstart - maybe used to hunt for the file on disc
- *
- * Hack for NFSv2: Maximum FAT entry number is 28bits and maximum
- * i_pos is 40bits (blocknr(32) + dir offset(8)), so two 4bits
- * of i_logstart is used to store the directory entry offset.
- */
-
-static struct dentry *fat_fh_to_dentry(struct super_block *sb,
-		struct fid *fid, int fh_len, int fh_type)
-{
-	struct inode *inode = NULL;
-	u32 *fh = fid->raw;
-
-	if (fh_len < 5 || fh_type != 3)
-		return NULL;
-
-	inode = ilookup(sb, fh[0]);
-	if (!inode || inode->i_generation != fh[1]) {
-		if (inode)
-			iput(inode);
-		inode = NULL;
-	}
-	if (!inode) {
-		loff_t i_pos;
-		int i_logstart = fh[3] & 0x0fffffff;
-
-		i_pos = (loff_t)fh[2] << 8;
-		i_pos |= ((fh[3] >> 24) & 0xf0) | (fh[4] >> 28);
-
-		/* try 2 - see if i_pos is in F-d-c
-		 * require i_logstart to be the same
-		 * Will fail if you truncate and then re-write
-		 */
-
-		inode = fat_iget(sb, i_pos);
-		if (inode && MSDOS_I(inode)->i_logstart != i_logstart) {
-			iput(inode);
-			inode = NULL;
-		}
-	}
-
-	/*
-	 * For now, do nothing if the inode is not found.
-	 *
-	 * What we could do is:
-	 *
-	 *	- follow the file starting at fh[4], and record the ".." entry,
-	 *	  and the name of the fh[2] entry.
-	 *	- then follow the ".." file finding the next step up.
-	 *
-	 * This way we build a path to the root of the tree. If this works, we
-	 * lookup the path and so get this inode into the cache.  Finally try
-	 * the fat_iget lookup again.  If that fails, then we are totally out
-	 * of luck.  But all that is for another day
-	 */
-	return d_obtain_alias(inode);
-}
-
-static int
-fat_encode_fh(struct dentry *de, __u32 *fh, int *lenp, int connectable)
-{
-	int len = *lenp;
-	struct inode *inode =  de->d_inode;
-	u32 ipos_h, ipos_m, ipos_l;
-
-	if (len < 5) {
-		*lenp = 5;
-		return 255; /* no room */
-	}
-
-	ipos_h = MSDOS_I(inode)->i_pos >> 8;
-	ipos_m = (MSDOS_I(inode)->i_pos & 0xf0) << 24;
-	ipos_l = (MSDOS_I(inode)->i_pos & 0x0f) << 28;
-	*lenp = 5;
-	fh[0] = inode->i_ino;
-	fh[1] = inode->i_generation;
-	fh[2] = ipos_h;
-	fh[3] = ipos_m | MSDOS_I(inode)->i_logstart;
-	spin_lock(&de->d_lock);
-	fh[4] = ipos_l | MSDOS_I(de->d_parent->d_inode)->i_logstart;
-	spin_unlock(&de->d_lock);
-	return 3;
-}
-
-static struct dentry *fat_get_parent(struct dentry *child)
-{
-	struct super_block *sb = child->d_sb;
-	struct buffer_head *bh;
-	struct msdos_dir_entry *de;
-	loff_t i_pos;
-	struct dentry *parent;
-	struct inode *inode;
-	int err;
-
-	lock_super(sb);
-
-	err = fat_get_dotdot_entry(child->d_inode, &bh, &de, &i_pos);
-	if (err) {
-		parent = ERR_PTR(err);
-		goto out;
-	}
-	inode = fat_build_inode(sb, de, i_pos);
-	brelse(bh);
-
-	parent = d_obtain_alias(inode);
-out:
-	unlock_super(sb);
-
-	return parent;
-}
-
-static const struct export_operations fat_export_ops = {
-	.encode_fh	= fat_encode_fh,
-	.fh_to_dentry	= fat_fh_to_dentry,
-	.get_parent	= fat_get_parent,
-};
-
-static int fat_show_options(struct seq_file *m, struct dentry *root)
-{
-	struct msdos_sb_info *sbi = MSDOS_SB(root->d_sb);
-	struct fat_mount_options *opts = &sbi->options;
-	int isvfat = opts->isvfat;
-
-	if (opts->fs_uid != 0)
-		seq_printf(m, ",uid=%u", opts->fs_uid);
-	if (opts->fs_gid != 0)
-		seq_printf(m, ",gid=%u", opts->fs_gid);
-	seq_printf(m, ",fmask=%04o", opts->fs_fmask);
-	seq_printf(m, ",dmask=%04o", opts->fs_dmask);
-	if (opts->allow_utime)
-		seq_printf(m, ",allow_utime=%04o", opts->allow_utime);
-	if (sbi->nls_disk)
-		seq_printf(m, ",codepage=%s", sbi->nls_disk->charset);
-	if (isvfat) {
-		if (sbi->nls_io)
-			seq_printf(m, ",iocharset=%s", sbi->nls_io->charset);
-
-		switch (opts->shortname) {
-		case VFAT_SFN_DISPLAY_WIN95 | VFAT_SFN_CREATE_WIN95:
-			seq_puts(m, ",shortname=win95");
-			break;
-		case VFAT_SFN_DISPLAY_WINNT | VFAT_SFN_CREATE_WINNT:
-			seq_puts(m, ",shortname=winnt");
-			break;
-		case VFAT_SFN_DISPLAY_WINNT | VFAT_SFN_CREATE_WIN95:
-			seq_puts(m, ",shortname=mixed");
-			break;
-		case VFAT_SFN_DISPLAY_LOWER | VFAT_SFN_CREATE_WIN95:
-			seq_puts(m, ",shortname=lower");
-			break;
-		default:
-			seq_puts(m, ",shortname=unknown");
-			break;
-		}
-	}
-	if (opts->name_check != 'n')
-		seq_printf(m, ",check=%c", opts->name_check);
-	if (opts->usefree)
-		seq_puts(m, ",usefree");
-	if (opts->quiet)
-		seq_puts(m, ",quiet");
-	if (opts->showexec)
-		seq_puts(m, ",showexec");
-	if (opts->sys_immutable)
-		seq_puts(m, ",sys_immutable");
-	if (!isvfat) {
-		if (opts->dotsOK)
-			seq_puts(m, ",dotsOK=yes");
-		if (opts->nocase)
-			seq_puts(m, ",nocase");
-	} else {
-		if (opts->utf8)
-			seq_puts(m, ",utf8");
-		if (opts->unicode_xlate)
-			seq_puts(m, ",uni_xlate");
-		if (!opts->numtail)
-			seq_puts(m, ",nonumtail");
-		if (opts->rodir)
-			seq_puts(m, ",rodir");
-	}
-	if (opts->flush)
-		seq_puts(m, ",flush");
-	if (opts->tz_utc)
-		seq_puts(m, ",tz=UTC");
-	if (opts->errors == FAT_ERRORS_CONT)
-		seq_puts(m, ",errors=continue");
-	else if (opts->errors == FAT_ERRORS_PANIC)
-		seq_puts(m, ",errors=panic");
-	else
-		seq_puts(m, ",errors=remount-ro");
-	if (opts->discard)
-		seq_puts(m, ",discard");
-
-	return 0;
-}
-
-enum {
-	Opt_check_n, Opt_check_r, Opt_check_s, Opt_uid, Opt_gid,
-	Opt_umask, Opt_dmask, Opt_fmask, Opt_allow_utime, Opt_codepage,
-	Opt_usefree, Opt_nocase, Opt_quiet, Opt_showexec, Opt_debug,
-	Opt_immutable, Opt_dots, Opt_nodots,
-	Opt_charset, Opt_shortname_lower, Opt_shortname_win95,
-	Opt_shortname_winnt, Opt_shortname_mixed, Opt_utf8_no, Opt_utf8_yes,
-	Opt_uni_xl_no, Opt_uni_xl_yes, Opt_nonumtail_no, Opt_nonumtail_yes,
-	Opt_obsolete, Opt_flush, Opt_tz_utc, Opt_rodir, Opt_err_cont,
-	Opt_err_panic, Opt_err_ro, Opt_discard, Opt_err,
-};
-
-static const match_table_t fat_tokens = {
-	{Opt_check_r, "check=relaxed"},
-	{Opt_check_s, "check=strict"},
-	{Opt_check_n, "check=normal"},
-	{Opt_check_r, "check=r"},
-	{Opt_check_s, "check=s"},
-	{Opt_check_n, "check=n"},
-	{Opt_uid, "uid=%u"},
-	{Opt_gid, "gid=%u"},
-	{Opt_umask, "umask=%o"},
-	{Opt_dmask, "dmask=%o"},
-	{Opt_fmask, "fmask=%o"},
-	{Opt_allow_utime, "allow_utime=%o"},
-	{Opt_codepage, "codepage=%u"},
-	{Opt_usefree, "usefree"},
-	{Opt_nocase, "nocase"},
-	{Opt_quiet, "quiet"},
-	{Opt_showexec, "showexec"},
-	{Opt_debug, "debug"},
-	{Opt_immutable, "sys_immutable"},
-	{Opt_flush, "flush"},
-	{Opt_tz_utc, "tz=UTC"},
-	{Opt_err_cont, "errors=continue"},
-	{Opt_err_panic, "errors=panic"},
-	{Opt_err_ro, "errors=remount-ro"},
-	{Opt_discard, "discard"},
-	{Opt_obsolete, "conv=binary"},
-	{Opt_obsolete, "conv=text"},
-	{Opt_obsolete, "conv=auto"},
-	{Opt_obsolete, "conv=b"},
-	{Opt_obsolete, "conv=t"},
-	{Opt_obsolete, "conv=a"},
-	{Opt_obsolete, "fat=%u"},
-	{Opt_obsolete, "blocksize=%u"},
-	{Opt_obsolete, "cvf_format=%20s"},
-	{Opt_obsolete, "cvf_options=%100s"},
-	{Opt_obsolete, "posix"},
-	{Opt_err, NULL},
-};
-static const match_table_t msdos_tokens = {
-	{Opt_nodots, "nodots"},
-	{Opt_nodots, "dotsOK=no"},
-	{Opt_dots, "dots"},
-	{Opt_dots, "dotsOK=yes"},
-	{Opt_err, NULL}
-};
-static const match_table_t vfat_tokens = {
-	{Opt_charset, "iocharset=%s"},
-	{Opt_shortname_lower, "shortname=lower"},
-	{Opt_shortname_win95, "shortname=win95"},
-	{Opt_shortname_winnt, "shortname=winnt"},
-	{Opt_shortname_mixed, "shortname=mixed"},
-	{Opt_utf8_no, "utf8=0"},		/* 0 or no or false */
-	{Opt_utf8_no, "utf8=no"},
-	{Opt_utf8_no, "utf8=false"},
-	{Opt_utf8_yes, "utf8=1"},		/* empty or 1 or yes or true */
-	{Opt_utf8_yes, "utf8=yes"},
-	{Opt_utf8_yes, "utf8=true"},
-	{Opt_utf8_yes, "utf8"},
-	{Opt_uni_xl_no, "uni_xlate=0"},		/* 0 or no or false */
-	{Opt_uni_xl_no, "uni_xlate=no"},
-	{Opt_uni_xl_no, "uni_xlate=false"},
-	{Opt_uni_xl_yes, "uni_xlate=1"},	/* empty or 1 or yes or true */
-	{Opt_uni_xl_yes, "uni_xlate=yes"},
-	{Opt_uni_xl_yes, "uni_xlate=true"},
-	{Opt_uni_xl_yes, "uni_xlate"},
-	{Opt_nonumtail_no, "nonumtail=0"},	/* 0 or no or false */
-	{Opt_nonumtail_no, "nonumtail=no"},
-	{Opt_nonumtail_no, "nonumtail=false"},
-	{Opt_nonumtail_yes, "nonumtail=1"},	/* empty or 1 or yes or true */
-	{Opt_nonumtail_yes, "nonumtail=yes"},
-	{Opt_nonumtail_yes, "nonumtail=true"},
-	{Opt_nonumtail_yes, "nonumtail"},
-	{Opt_rodir, "rodir"},
-	{Opt_err, NULL}
-};
-
-static int parse_options(struct super_block *sb, char *options, int is_vfat,
-			 int silent, int *debug, struct fat_mount_options *opts)
-{
-	char *p;
-	substring_t args[MAX_OPT_ARGS];
-	int option;
-	char *iocharset;
-
-	opts->isvfat = is_vfat;
-
-	opts->fs_uid = current_uid();
-	opts->fs_gid = current_gid();
-	opts->fs_fmask = opts->fs_dmask = current_umask();
-	opts->allow_utime = -1;
-	opts->codepage = fat_default_codepage;
-	opts->iocharset = fat_default_iocharset;
-	if (is_vfat) {
-		opts->shortname = VFAT_SFN_DISPLAY_WINNT|VFAT_SFN_CREATE_WIN95;
-		opts->rodir = 0;
-	} else {
-		opts->shortname = 0;
-		opts->rodir = 1;
-	}
-	opts->name_check = 'n';
-	opts->quiet = opts->showexec = opts->sys_immutable = opts->dotsOK =  0;
-	opts->utf8 = opts->unicode_xlate = 0;
-	opts->numtail = 1;
-	opts->usefree = opts->nocase = 0;
-	opts->tz_utc = 0;
-	opts->errors = FAT_ERRORS_RO;
-	*debug = 0;
-
-	if (!options)
-		goto out;
-
-	while ((p = strsep(&options, ",")) != NULL) {
-		int token;
-		if (!*p)
-			continue;
-
-		token = match_token(p, fat_tokens, args);
-		if (token == Opt_err) {
-			if (is_vfat)
-				token = match_token(p, vfat_tokens, args);
-			else
-				token = match_token(p, msdos_tokens, args);
-		}
-		switch (token) {
-		case Opt_check_s:
-			opts->name_check = 's';
-			break;
-		case Opt_check_r:
-			opts->name_check = 'r';
-			break;
-		case Opt_check_n:
-			opts->name_check = 'n';
-			break;
-		case Opt_usefree:
-			opts->usefree = 1;
-			break;
-		case Opt_nocase:
-			if (!is_vfat)
-				opts->nocase = 1;
-			else {
-				/* for backward compatibility */
-				opts->shortname = VFAT_SFN_DISPLAY_WIN95
-					| VFAT_SFN_CREATE_WIN95;
-			}
-			break;
-		case Opt_quiet:
-			opts->quiet = 1;
-			break;
-		case Opt_showexec:
-			opts->showexec = 1;
-			break;
-		case Opt_debug:
-			*debug = 1;
-			break;
-		case Opt_immutable:
-			opts->sys_immutable = 1;
-			break;
-		case Opt_uid:
-			if (match_int(&args[0], &option))
-				return 0;
-			opts->fs_uid = option;
-			break;
-		case Opt_gid:
-			if (match_int(&args[0], &option))
-				return 0;
-			opts->fs_gid = option;
-			break;
-		case Opt_umask:
-			if (match_octal(&args[0], &option))
-				return 0;
-			opts->fs_fmask = opts->fs_dmask = option;
-			break;
-		case Opt_dmask:
-			if (match_octal(&args[0], &option))
-				return 0;
-			opts->fs_dmask = option;
-			break;
-		case Opt_fmask:
-			if (match_octal(&args[0], &option))
-				return 0;
-			opts->fs_fmask = option;
-			break;
-		case Opt_allow_utime:
-			if (match_octal(&args[0], &option))
-				return 0;
-			opts->allow_utime = option & (S_IWGRP | S_IWOTH);
-			break;
-		case Opt_codepage:
-			if (match_int(&args[0], &option))
-				return 0;
-			opts->codepage = option;
-			break;
-		case Opt_flush:
-			opts->flush = 1;
-			break;
-		case Opt_tz_utc:
-			opts->tz_utc = 1;
-			break;
-		case Opt_err_cont:
-			opts->errors = FAT_ERRORS_CONT;
-			break;
-		case Opt_err_panic:
-			opts->errors = FAT_ERRORS_PANIC;
-			break;
-		case Opt_err_ro:
-			opts->errors = FAT_ERRORS_RO;
-			break;
-
-		/* msdos specific */
-		case Opt_dots:
-			opts->dotsOK = 1;
-			break;
-		case Opt_nodots:
-			opts->dotsOK = 0;
-			break;
-
-		/* vfat specific */
-		case Opt_charset:
-			if (opts->iocharset != fat_default_iocharset)
-				kfree(opts->iocharset);
-			iocharset = match_strdup(&args[0]);
-			if (!iocharset)
-				return -ENOMEM;
-			opts->iocharset = iocharset;
-			break;
-		case Opt_shortname_lower:
-			opts->shortname = VFAT_SFN_DISPLAY_LOWER
-					| VFAT_SFN_CREATE_WIN95;
-			break;
-		case Opt_shortname_win95:
-			opts->shortname = VFAT_SFN_DISPLAY_WIN95
-					| VFAT_SFN_CREATE_WIN95;
-			break;
-		case Opt_shortname_winnt:
-			opts->shortname = VFAT_SFN_DISPLAY_WINNT
-					| VFAT_SFN_CREATE_WINNT;
-			break;
-		case Opt_shortname_mixed:
-			opts->shortname = VFAT_SFN_DISPLAY_WINNT
-					| VFAT_SFN_CREATE_WIN95;
-			break;
-		case Opt_utf8_no:		/* 0 or no or false */
-			opts->utf8 = 0;
-			break;
-		case Opt_utf8_yes:		/* empty or 1 or yes or true */
-			opts->utf8 = 1;
-			break;
-		case Opt_uni_xl_no:		/* 0 or no or false */
-			opts->unicode_xlate = 0;
-			break;
-		case Opt_uni_xl_yes:		/* empty or 1 or yes or true */
-			opts->unicode_xlate = 1;
-			break;
-		case Opt_nonumtail_no:		/* 0 or no or false */
-			opts->numtail = 1;	/* negated option */
-			break;
-		case Opt_nonumtail_yes:		/* empty or 1 or yes or true */
-			opts->numtail = 0;	/* negated option */
-			break;
-		case Opt_rodir:
-			opts->rodir = 1;
-			break;
-		case Opt_discard:
-			opts->discard = 1;
-			break;
-
-		/* obsolete mount options */
-		case Opt_obsolete:
-			fat_msg(sb, KERN_INFO, "\"%s\" option is obsolete, "
-			       "not supported now", p);
-			break;
-		/* unknown option */
-		default:
-			if (!silent) {
-				fat_msg(sb, KERN_ERR,
-				       "Unrecognized mount option \"%s\" "
-				       "or missing value", p);
-			}
-			return -EINVAL;
-		}
-	}
-
-out:
-	/* UTF-8 doesn't provide FAT semantics */
-	if (!strcmp(opts->iocharset, "utf8")) {
-		fat_msg(sb, KERN_WARNING, "utf8 is not a recommended IO charset"
-		       " for FAT filesystems, filesystem will be "
-		       "case sensitive!");
-	}
-
-	/* If user doesn't specify allow_utime, it's initialized from dmask. */
-	if (opts->allow_utime == (unsigned short)-1)
-		opts->allow_utime = ~opts->fs_dmask & (S_IWGRP | S_IWOTH);
-	if (opts->unicode_xlate)
-		opts->utf8 = 0;
-
-	return 0;
-}
-
-static int fat_read_root(struct inode *inode)
-{
-	struct super_block *sb = inode->i_sb;
-	struct msdos_sb_info *sbi = MSDOS_SB(sb);
-	int error;
-
-	MSDOS_I(inode)->i_pos = 0;
-	inode->i_uid = sbi->options.fs_uid;
-	inode->i_gid = sbi->options.fs_gid;
-	inode->i_version++;
-	inode->i_generation = 0;
-	inode->i_mode = fat_make_mode(sbi, ATTR_DIR, S_IRWXUGO);
-	inode->i_op = sbi->dir_ops;
-	inode->i_fop = &fat_dir_operations;
-	if (sbi->fat_bits == 32) {
-		MSDOS_I(inode)->i_start = sbi->root_cluster;
-		error = fat_calc_dir_size(inode);
-		if (error < 0)
-			return error;
-	} else {
-		MSDOS_I(inode)->i_start = 0;
-		inode->i_size = sbi->dir_entries * sizeof(struct msdos_dir_entry);
-	}
-	inode->i_blocks = ((inode->i_size + (sbi->cluster_size - 1))
-			   & ~((loff_t)sbi->cluster_size - 1)) >> 9;
-	MSDOS_I(inode)->i_logstart = 0;
-	MSDOS_I(inode)->mmu_private = inode->i_size;
-
-	fat_save_attrs(inode, ATTR_DIR);
-	inode->i_mtime.tv_sec = inode->i_atime.tv_sec = inode->i_ctime.tv_sec = 0;
-	inode->i_mtime.tv_nsec = inode->i_atime.tv_nsec = inode->i_ctime.tv_nsec = 0;
-	set_nlink(inode, fat_subdirs(inode)+2);
-
-	return 0;
-}
-
-/*
- * Read the super block of an MS-DOS FS.
- */
-int fat_fill_super(struct super_block *sb, void *data, int silent, int isvfat,
-		   void (*setup)(struct super_block *))
-{
-	struct inode *root_inode = NULL, *fat_inode = NULL;
-	struct buffer_head *bh;
-	struct fat_boot_sector *b;
-	struct fat_boot_bsx *bsx;
-	struct msdos_sb_info *sbi;
-	u16 logical_sector_size;
-	u32 total_sectors, total_clusters, fat_clusters, rootdir_sectors;
-	int debug;
-	unsigned int media;
-	long error;
-	char buf[50];
-
-	/*
-	 * GFP_KERNEL is ok here, because while we do hold the
-	 * supeblock lock, memory pressure can't call back into
-	 * the filesystem, since we're only just about to mount
-	 * it and have no inodes etc active!
-	 */
-	sbi = kzalloc(sizeof(struct msdos_sb_info), GFP_KERNEL);
-	if (!sbi)
-		return -ENOMEM;
-	sb->s_fs_info = sbi;
-
-	sb->s_flags |= MS_NODIRATIME;
-	sb->s_magic = MSDOS_SUPER_MAGIC;
-	sb->s_op = &fat_sops;
-	sb->s_export_op = &fat_export_ops;
-	ratelimit_state_init(&sbi->ratelimit, DEFAULT_RATELIMIT_INTERVAL,
-			     DEFAULT_RATELIMIT_BURST);
-
-	error = parse_options(sb, data, isvfat, silent, &debug, &sbi->options);
-	if (error)
-		goto out_fail;
-
-	setup(sb); /* flavour-specific stuff that needs options */
-
-	error = -EIO;
-	sb_min_blocksize(sb, 512);
-	bh = sb_bread(sb, 0);
-	if (bh == NULL) {
-		fat_msg(sb, KERN_ERR, "unable to read boot sector");
-		goto out_fail;
-	}
-
-	b = (struct fat_boot_sector *) bh->b_data;
-	if (!b->reserved) {
-		if (!silent)
-			fat_msg(sb, KERN_ERR, "bogus number of reserved sectors");
-		brelse(bh);
-		goto out_invalid;
-	}
-	if (!b->fats) {
-		if (!silent)
-			fat_msg(sb, KERN_ERR, "bogus number of FAT structure");
-		brelse(bh);
-		goto out_invalid;
-	}
-
-	/*
-	 * Earlier we checked here that b->secs_track and b->head are nonzero,
-	 * but it turns out valid FAT filesystems can have zero there.
-	 */
-
-	media = b->media;
-	if (!fat_valid_media(media)) {
-		if (!silent)
-			fat_msg(sb, KERN_ERR, "invalid media value (0x%02x)",
-			       media);
-		brelse(bh);
-		goto out_invalid;
-	}
-	logical_sector_size = get_unaligned_le16(&b->sector_size);
-	if (!is_power_of_2(logical_sector_size)
-	    || (logical_sector_size < 512)
-	    || (logical_sector_size > 4096)) {
-		if (!silent)
-			fat_msg(sb, KERN_ERR, "bogus logical sector size %u",
-			       logical_sector_size);
-		brelse(bh);
-		goto out_invalid;
-	}
-	sbi->sec_per_clus = b->sec_per_clus;
-	if (!is_power_of_2(sbi->sec_per_clus)) {
-		if (!silent)
-			fat_msg(sb, KERN_ERR, "bogus sectors per cluster %u",
-			       sbi->sec_per_clus);
-		brelse(bh);
-		goto out_invalid;
-	}
-
-	if (logical_sector_size < sb->s_blocksize) {
-		fat_msg(sb, KERN_ERR, "logical sector size too small for device"
-		       " (logical sector size = %u)", logical_sector_size);
-		brelse(bh);
-		goto out_fail;
-	}
-	if (logical_sector_size > sb->s_blocksize) {
-		brelse(bh);
-
-		if (!sb_set_blocksize(sb, logical_sector_size)) {
-			fat_msg(sb, KERN_ERR, "unable to set blocksize %u",
-			       logical_sector_size);
-			goto out_fail;
-		}
-		bh = sb_bread(sb, 0);
-		if (bh == NULL) {
-			fat_msg(sb, KERN_ERR, "unable to read boot sector"
-			       " (logical sector size = %lu)",
-			       sb->s_blocksize);
-			goto out_fail;
-		}
-		b = (struct fat_boot_sector *) bh->b_data;
-	}
-
-	sbi->cluster_size = sb->s_blocksize * sbi->sec_per_clus;
-	sbi->cluster_bits = ffs(sbi->cluster_size) - 1;
-	sbi->fats = b->fats;
-	sbi->fat_bits = 0;		/* Don't know yet */
-	sbi->fat_start = le16_to_cpu(b->reserved);
-	sbi->fat_length = le16_to_cpu(b->fat_length);
-	sbi->root_cluster = 0;
-	sbi->free_clusters = -1;	/* Don't know yet */
-	sbi->free_clus_valid = 0;
-	sbi->prev_free = FAT_START_ENT;
-	sb->s_maxbytes = 0xffffffff;
-
-	if (!sbi->fat_length && b->fat32_length) {
-		struct fat_boot_fsinfo *fsinfo;
-		struct buffer_head *fsinfo_bh;
-
-		/* Must be FAT32 */
-		sbi->fat_bits = 32;
-		sbi->fat_length = le32_to_cpu(b->fat32_length);
-		sbi->root_cluster = le32_to_cpu(b->root_cluster);
-
-		/* MC - if info_sector is 0, don't multiply by 0 */
-		sbi->fsinfo_sector = le16_to_cpu(b->info_sector);
-		if (sbi->fsinfo_sector == 0)
-			sbi->fsinfo_sector = 1;
-
-		fsinfo_bh = sb_bread(sb, sbi->fsinfo_sector);
-		if (fsinfo_bh == NULL) {
-			fat_msg(sb, KERN_ERR, "bread failed, FSINFO block"
-			       " (sector = %lu)", sbi->fsinfo_sector);
-			brelse(bh);
-			goto out_fail;
-		}
-
-		bsx = (struct fat_boot_bsx *)(bh->b_data + FAT32_BSX_OFFSET);
-
-		fsinfo = (struct fat_boot_fsinfo *)fsinfo_bh->b_data;
-		if (!IS_FSINFO(fsinfo)) {
-			fat_msg(sb, KERN_WARNING, "Invalid FSINFO signature: "
-			       "0x%08x, 0x%08x (sector = %lu)",
-			       le32_to_cpu(fsinfo->signature1),
-			       le32_to_cpu(fsinfo->signature2),
-			       sbi->fsinfo_sector);
-		} else {
-			if (sbi->options.usefree)
-				sbi->free_clus_valid = 1;
-			sbi->free_clusters = le32_to_cpu(fsinfo->free_clusters);
-			sbi->prev_free = le32_to_cpu(fsinfo->next_cluster);
-		}
-
-		brelse(fsinfo_bh);
-	} else {
-		bsx = (struct fat_boot_bsx *)(bh->b_data + FAT16_BSX_OFFSET);
-	}
-
-	/* interpret volume ID as a little endian 32 bit integer */
-	sbi->vol_id = (((u32)bsx->vol_id[0]) | ((u32)bsx->vol_id[1] << 8) |
-		((u32)bsx->vol_id[2] << 16) | ((u32)bsx->vol_id[3] << 24));
-
-	sbi->dir_per_block = sb->s_blocksize / sizeof(struct msdos_dir_entry);
-	sbi->dir_per_block_bits = ffs(sbi->dir_per_block) - 1;
-
-	sbi->dir_start = sbi->fat_start + sbi->fats * sbi->fat_length;
-	sbi->dir_entries = get_unaligned_le16(&b->dir_entries);
-	if (sbi->dir_entries & (sbi->dir_per_block - 1)) {
-		if (!silent)
-			fat_msg(sb, KERN_ERR, "bogus directroy-entries per block"
-			       " (%u)", sbi->dir_entries);
-		brelse(bh);
-		goto out_invalid;
-	}
-
-	rootdir_sectors = sbi->dir_entries
-		* sizeof(struct msdos_dir_entry) / sb->s_blocksize;
-	sbi->data_start = sbi->dir_start + rootdir_sectors;
-	total_sectors = get_unaligned_le16(&b->sectors);
-	if (total_sectors == 0)
-		total_sectors = le32_to_cpu(b->total_sect);
-
-	total_clusters = (total_sectors - sbi->data_start) / sbi->sec_per_clus;
-
-	if (sbi->fat_bits != 32)
-		sbi->fat_bits = (total_clusters > MAX_FAT12) ? 16 : 12;
-
-	/* check that FAT table does not overflow */
-	fat_clusters = sbi->fat_length * sb->s_blocksize * 8 / sbi->fat_bits;
-	total_clusters = min(total_clusters, fat_clusters - FAT_START_ENT);
-	if (total_clusters > MAX_FAT(sb)) {
-		if (!silent)
-			fat_msg(sb, KERN_ERR, "count of clusters too big (%u)",
-			       total_clusters);
-		brelse(bh);
-		goto out_invalid;
-	}
-
-	sbi->max_cluster = total_clusters + FAT_START_ENT;
-	/* check the free_clusters, it's not necessarily correct */
-	if (sbi->free_clusters != -1 && sbi->free_clusters > total_clusters)
-		sbi->free_clusters = -1;
-	/* check the prev_free, it's not necessarily correct */
-	sbi->prev_free %= sbi->max_cluster;
-	if (sbi->prev_free < FAT_START_ENT)
-		sbi->prev_free = FAT_START_ENT;
-
-	brelse(bh);
-
-	/* set up enough so that it can read an inode */
-	fat_hash_init(sb);
-	fat_ent_access_init(sb);
-
-	/*
-	 * The low byte of FAT's first entry must have same value with
-	 * media-field.  But in real world, too many devices is
-	 * writing wrong value.  So, removed that validity check.
-	 *
-	 * if (FAT_FIRST_ENT(sb, media) != first)
-	 */
-
-	error = -EINVAL;
-	sprintf(buf, "cp%d", sbi->options.codepage);
-	sbi->nls_disk = load_nls(buf);
-	if (!sbi->nls_disk) {
-		fat_msg(sb, KERN_ERR, "codepage %s not found", buf);
-		goto out_fail;
-	}
-
-	/* FIXME: utf8 is using iocharset for upper/lower conversion */
-	if (sbi->options.isvfat) {
-		sbi->nls_io = load_nls(sbi->options.iocharset);
-		if (!sbi->nls_io) {
-			fat_msg(sb, KERN_ERR, "IO charset %s not found",
-			       sbi->options.iocharset);
-			goto out_fail;
-		}
-	}
-
-	error = -ENOMEM;
-	fat_inode = new_inode(sb);
-	if (!fat_inode)
-		goto out_fail;
-	MSDOS_I(fat_inode)->i_pos = 0;
-	sbi->fat_inode = fat_inode;
-	root_inode = new_inode(sb);
-	if (!root_inode)
-		goto out_fail;
-	root_inode->i_ino = MSDOS_ROOT_INO;
-	root_inode->i_version = 1;
-	error = fat_read_root(root_inode);
-	if (error < 0) {
-		iput(root_inode);
-		goto out_fail;
-	}
-	error = -ENOMEM;
-	insert_inode_hash(root_inode);
-	sb->s_root = d_make_root(root_inode);
-	if (!sb->s_root) {
-		fat_msg(sb, KERN_ERR, "get root inode failed");
-		goto out_fail;
-	}
-
-	return 0;
-
-out_invalid:
-	error = -EINVAL;
-	if (!silent)
-		fat_msg(sb, KERN_INFO, "Can't find a valid FAT filesystem");
-
-out_fail:
-	if (fat_inode)
-		iput(fat_inode);
-	unload_nls(sbi->nls_io);
-	unload_nls(sbi->nls_disk);
-	if (sbi->options.iocharset != fat_default_iocharset)
-		kfree(sbi->options.iocharset);
-	sb->s_fs_info = NULL;
-	kfree(sbi);
-	return error;
-}
-
-EXPORT_SYMBOL_GPL(fat_fill_super);
-
-/*
- * helper function for fat_flush_inodes.  This writes both the inode
- * and the file data blocks, waiting for in flight data blocks before
- * the start of the call.  It does not wait for any io started
- * during the call
- */
-static int writeback_inode(struct inode *inode)
-{
-
-	int ret;
-	struct address_space *mapping = inode->i_mapping;
-	struct writeback_control wbc = {
-	       .sync_mode = WB_SYNC_NONE,
-	      .nr_to_write = 0,
-	};
-	/* if we used WB_SYNC_ALL, sync_inode waits for the io for the
-	* inode to finish.  So WB_SYNC_NONE is sent down to sync_inode
-	* and filemap_fdatawrite is used for the data blocks
-	*/
-	ret = sync_inode(inode, &wbc);
-	if (!ret)
-	       ret = filemap_fdatawrite(mapping);
-	return ret;
-}
-
-/*
- * write data and metadata corresponding to i1 and i2.  The io is
- * started but we do not wait for any of it to finish.
- *
- * filemap_flush is used for the block device, so if there is a dirty
- * page for a block already in flight, we will not wait and start the
- * io over again
- */
-int fat_flush_inodes(struct super_block *sb, struct inode *i1, struct inode *i2)
-{
-	int ret = 0;
-	if (!MSDOS_SB(sb)->options.flush)
-		return 0;
-	if (i1)
-		ret = writeback_inode(i1);
-	if (!ret && i2)
-		ret = writeback_inode(i2);
-	if (!ret) {
-		struct address_space *mapping = sb->s_bdev->bd_inode->i_mapping;
-		ret = filemap_flush(mapping);
-	}
-	return ret;
-}
-EXPORT_SYMBOL_GPL(fat_flush_inodes);
-
-static int __init init_fat_fs(void)
-{
-	int err;
-
-	err = fat_cache_init();
-	if (err)
-		return err;
-
-	err = fat_init_inodecache();
-	if (err)
-		goto failed;
-
-	return 0;
-
-failed:
-	fat_cache_destroy();
-	return err;
-}
-
-static void __exit exit_fat_fs(void)
-{
-	fat_cache_destroy();
-	fat_destroy_inodecache();
-}
-
-module_init(init_fat_fs)
-module_exit(exit_fat_fs)
-
-MODULE_LICENSE("GPL");