diff options
Diffstat (limited to 'ANDROID_3.4.5/fs/ext2/xip.c')
-rw-r--r-- | ANDROID_3.4.5/fs/ext2/xip.c | 90 |
1 files changed, 0 insertions, 90 deletions
diff --git a/ANDROID_3.4.5/fs/ext2/xip.c b/ANDROID_3.4.5/fs/ext2/xip.c deleted file mode 100644 index 1c331285..00000000 --- a/ANDROID_3.4.5/fs/ext2/xip.c +++ /dev/null @@ -1,90 +0,0 @@ -/* - * linux/fs/ext2/xip.c - * - * Copyright (C) 2005 IBM Corporation - * Author: Carsten Otte (cotte@de.ibm.com) - */ - -#include <linux/mm.h> -#include <linux/fs.h> -#include <linux/genhd.h> -#include <linux/buffer_head.h> -#include <linux/blkdev.h> -#include "ext2.h" -#include "xip.h" - -static inline int -__inode_direct_access(struct inode *inode, sector_t block, - void **kaddr, unsigned long *pfn) -{ - struct block_device *bdev = inode->i_sb->s_bdev; - const struct block_device_operations *ops = bdev->bd_disk->fops; - sector_t sector; - - sector = block * (PAGE_SIZE / 512); /* ext2 block to bdev sector */ - - BUG_ON(!ops->direct_access); - return ops->direct_access(bdev, sector, kaddr, pfn); -} - -static inline int -__ext2_get_block(struct inode *inode, pgoff_t pgoff, int create, - sector_t *result) -{ - struct buffer_head tmp; - int rc; - - memset(&tmp, 0, sizeof(struct buffer_head)); - rc = ext2_get_block(inode, pgoff, &tmp, create); - *result = tmp.b_blocknr; - - /* did we get a sparse block (hole in the file)? */ - if (!tmp.b_blocknr && !rc) { - BUG_ON(create); - rc = -ENODATA; - } - - return rc; -} - -int -ext2_clear_xip_target(struct inode *inode, sector_t block) -{ - void *kaddr; - unsigned long pfn; - int rc; - - rc = __inode_direct_access(inode, block, &kaddr, &pfn); - if (!rc) - clear_page(kaddr); - return rc; -} - -void ext2_xip_verify_sb(struct super_block *sb) -{ - struct ext2_sb_info *sbi = EXT2_SB(sb); - - if ((sbi->s_mount_opt & EXT2_MOUNT_XIP) && - !sb->s_bdev->bd_disk->fops->direct_access) { - sbi->s_mount_opt &= (~EXT2_MOUNT_XIP); - ext2_msg(sb, KERN_WARNING, - "warning: ignoring xip option - " - "not supported by bdev"); - } -} - -int ext2_get_xip_mem(struct address_space *mapping, pgoff_t pgoff, int create, - void **kmem, unsigned long *pfn) -{ - int rc; - sector_t block; - - /* first, retrieve the sector number */ - rc = __ext2_get_block(mapping->host, pgoff, create, &block); - if (rc) - return rc; - - /* retrieve address of the target data */ - rc = __inode_direct_access(mapping->host, block, kmem, pfn); - return rc; -} |