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dax,ext2: replace ext2_clear_xip_target with dax_clear_blocks

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This is practically generic code; other filesystems will want to call it
from other places, but there's nothing ext2-specific about it.

Make it a little more generic by allowing it to take a count of the number
of bytes to zero rather than fixing it to a single page.  Thanks to Dave
Hansen for suggesting that I need to call cond_resched() if zeroing more
than one page.

Signed-off-by: Matthew Wilcox <[email protected]>
Cc: Andreas Dilger <[email protected]>
Cc: Boaz Harrosh <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Cc: Dave Chinner <[email protected]>
Cc: Jan Kara <[email protected]>
Cc: Jens Axboe <[email protected]>
Cc: Kirill A. Shutemov <[email protected]>
Cc: Mathieu Desnoyers <[email protected]>
Cc: Randy Dunlap <[email protected]>
Cc: Ross Zwisler <[email protected]>
Cc: Theodore Ts'o <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Matthew Wilcox 2015-02-16 15:58:59 -08:00 • committed by Linus Torvalds
commit 289c6aedac
5 changed files with 43 additions and 20 deletions
Download patch file Download diff file Expand all files Collapse all files

8
fs/ext2/inode.c
View file

@ -733,10 +733,12 @@ static int ext2_get_blocks(struct inode *inode,
if (IS_DAX(inode)) {
/*
* we need to clear the block
* block must be initialised before we put it in the tree
* so that it's not found by another thread before it's
* initialised
*/
err = ext2_clear_xip_target (inode,
le32_to_cpu(chain[depth-1].key));
err = dax_clear_blocks(inode, le32_to_cpu(chain[depth-1].key),
1 << inode->i_blkbits);
if (err) {
mutex_unlock(&ei->truncate_mutex);
goto cleanup;

14
fs/ext2/xip.c
View file

@ -42,20 +42,6 @@ __ext2_get_block(struct inode *inode, pgoff_t pgoff, int create,
return rc;
}
int
ext2_clear_xip_target(struct inode *inode, sector_t block)
{
void *kaddr;
unsigned long pfn;
long size;
size = __inode_direct_access(inode, block, &kaddr, &pfn, PAGE_SIZE);
if (size < 0)
return size;
clear_page(kaddr);
return 0;
}
void ext2_xip_verify_sb(struct super_block *sb)
{
struct ext2_sb_info *sbi = EXT2_SB(sb);

3
fs/ext2/xip.h
View file

@ -7,8 +7,6 @@
#ifdef CONFIG_EXT2_FS_XIP
extern void ext2_xip_verify_sb (struct super_block *);
extern int ext2_clear_xip_target (struct inode *, sector_t);
static inline int ext2_use_xip (struct super_block *sb)
{
struct ext2_sb_info *sbi = EXT2_SB(sb);
@ -19,6 +17,5 @@ int ext2_get_xip_mem(struct address_space *, pgoff_t, int,
#else
#define ext2_xip_verify_sb(sb) do { } while (0)
#define ext2_use_xip(sb) 0
#define ext2_clear_xip_target(inode, chain) 0
#define ext2_get_xip_mem NULL
#endif