diff options
| author | Jan Kara <jack@suse.cz> | 2009-04-27 16:43:51 +0200 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2009-06-11 21:36:03 -0400 |
| commit | 5cee5815d1564bbbd505fea86f4550f1efdb5cd0 (patch) | |
| tree | ba99c38932dc534bf56f0d7dcfeeca153f50b007 /fs/internal.h | |
| parent | 429479f031322a0cc5c921ffb2321a51718dc875 (diff) | |
| download | lwn-5cee5815d1564bbbd505fea86f4550f1efdb5cd0.tar.gz lwn-5cee5815d1564bbbd505fea86f4550f1efdb5cd0.zip | |
vfs: Make sys_sync() use fsync_super() (version 4)
It is unnecessarily fragile to have two places (fsync_super() and do_sync())
doing data integrity sync of the filesystem. Alter __fsync_super() to
accommodate needs of both callers and use it. So after this patch
__fsync_super() is the only place where we gather all the calls needed to
properly send all data on a filesystem to disk.
Nice bonus is that we get a complete livelock avoidance and write_supers()
is now only used for periodic writeback of superblocks.
sync_blockdevs() introduced a couple of patches ago is gone now.
[build fixes folded]
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/internal.h')
| -rw-r--r-- | fs/internal.h | 16 |
1 files changed, 7 insertions, 9 deletions
diff --git a/fs/internal.h b/fs/internal.h index 343a537ab809..dbec3cc28338 100644 --- a/fs/internal.h +++ b/fs/internal.h @@ -25,6 +25,8 @@ static inline int sb_is_blkdev_sb(struct super_block *sb) return sb == blockdev_superblock; } +extern int __sync_blockdev(struct block_device *bdev, int wait); + #else static inline void bdev_cache_init(void) { @@ -34,6 +36,11 @@ static inline int sb_is_blkdev_sb(struct super_block *sb) { return 0; } + +static inline int __sync_blockdev(struct block_device *bdev, int wait) +{ + return 0; +} #endif /* @@ -71,12 +78,3 @@ extern void chroot_fs_refs(struct path *, struct path *); * file_table.c */ extern void mark_files_ro(struct super_block *); - -/* - * super.c - */ -#ifdef CONFIG_BLOCK -extern void sync_blockdevs(void); -#else -static inline void sync_blockdevs(void) { } -#endif |