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VFS: export sync_sb_inodes

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This patch exports the 'sync_sb_inodes()' which is needed for
UBIFS because it has to force write-back from time to time.
Namely, the UBIFS budgeting subsystem forces write-back when
its pessimistic callculations show that there is no free
space on the media.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
This commit is contained in:
Artem Bityutskiy 2008-05-07 21:01:30 +03:00
parent ae8547b0a9
commit 4ee6afd344
2 changed files with 11 additions and 2 deletions
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11
fs/fs-writeback.c
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@ -439,8 +439,8 @@ __writeback_single_inode(struct inode *inode, struct writeback_control *wbc)
* on the writer throttling path, and we get decent balancing between many * on the writer throttling path, and we get decent balancing between many
* throttled threads: we don't want them all piling up on inode_sync_wait. * throttled threads: we don't want them all piling up on inode_sync_wait.
*/ */
static void void generic_sync_sb_inodes(struct super_block *sb,
sync_sb_inodes(struct super_block *sb, struct writeback_control *wbc) struct writeback_control *wbc)
{ {
const unsigned long start = jiffies; /* livelock avoidance */ const unsigned long start = jiffies; /* livelock avoidance */
@ -526,6 +526,13 @@ sync_sb_inodes(struct super_block *sb, struct writeback_control *wbc)
spin_unlock(&inode_lock); spin_unlock(&inode_lock);
return; /* Leave any unwritten inodes on s_io */ return; /* Leave any unwritten inodes on s_io */
} }
EXPORT_SYMBOL_GPL(generic_sync_sb_inodes);
static void sync_sb_inodes(struct super_block *sb,
struct writeback_control *wbc)
{
generic_sync_sb_inodes(sb, wbc);
}
/* /*
* Start writeback of dirty pagecache data against all unlocked inodes. * Start writeback of dirty pagecache data against all unlocked inodes.

2
include/linux/fs.h
View File

@ -1729,6 +1729,8 @@ static inline void invalidate_remote_inode(struct inode *inode)
extern int invalidate_inode_pages2(struct address_space *mapping); extern int invalidate_inode_pages2(struct address_space *mapping);
extern int invalidate_inode_pages2_range(struct address_space *mapping, extern int invalidate_inode_pages2_range(struct address_space *mapping,
pgoff_t start, pgoff_t end); pgoff_t start, pgoff_t end);
extern void generic_sync_sb_inodes(struct super_block *sb,
struct writeback_control *wbc);
extern int write_inode_now(struct inode *, int); extern int write_inode_now(struct inode *, int);
extern int filemap_fdatawrite(struct address_space *); extern int filemap_fdatawrite(struct address_space *);
extern int filemap_flush(struct address_space *); extern int filemap_flush(struct address_space *);