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Commit 4ee6afd3 authored by Artem Bityutskiy's avatar Artem Bityutskiy
Browse files

VFS: export sync_sb_inodes 



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: default avatarArtem Bityutskiy <Artem.Bityutskiy@nokia.com>
parent ae8547b0

fs/fs-writeback.c

+9 −2
Original line number Diff line number Diff line
@@ -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

 * throttled threads: we don't want them all piling up on inode_sync_wait.

 */

static void

sync_sb_inodes(struct super_block *sb, struct writeback_control *wbc)

void generic_sync_sb_inodes(struct super_block *sb,

				struct writeback_control *wbc)

{

	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);

	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.

include/linux/fs.h

+2 −0
Original line number Diff line number Diff line
@@ -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_range(struct address_space *mapping,

					 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 filemap_fdatawrite(struct address_space *);

extern int filemap_flush(struct address_space *);