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authorJan Kara <jack@suse.cz>2009-04-27 16:43:51 +0200
committerAl Viro <viro@zeniv.linux.org.uk>2009-06-11 21:36:03 -0400
commit5cee5815d1564bbbd505fea86f4550f1efdb5cd0 (patch)
treeba99c38932dc534bf56f0d7dcfeeca153f50b007 /fs/internal.h
parent429479f031322a0cc5c921ffb2321a51718dc875 (diff)
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.h16
1 files changed, 7 insertions, 9 deletions
diff --git a/fs/internal.h b/fs/internal.h
index 343a537ab80..dbec3cc2833 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