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authorChristoph Hellwig <hch@lst.de>2009-05-11 23:35:03 +0200
committerAl Viro <viro@zeniv.linux.org.uk>2009-06-11 21:36:09 -0400
commitebc1ac164560a241d9bf1b7519062910c3f90a01 (patch)
treedb17fd3043b15f8269cce2c2d00213814022fc30 /fs/ext4
parent01ba687577647beef6c5f2ea59bfb56fac9fcde2 (diff)
->write_super lock_super pushdown
Push down lock_super into ->write_super instances and remove it from the caller. Following filesystem don't need ->s_lock in ->write_super and are skipped: * bfs, nilfs2 - no other uses of s_lock and have internal locks in ->write_super * ext2 - uses BKL in ext2_write_super and has internal calls without s_lock * reiserfs - no other uses of s_lock as has reiserfs_write_lock (BKL) in ->write_super * xfs - no other uses of s_lock and uses internal lock (buffer lock on superblock buffer) to serialize ->write_super. Also xfs_fs_write_super is superflous and will go away in the next merge window Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/ext4')
-rw-r--r--fs/ext4/super.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index a9c68342592..c17200a4230 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -579,7 +579,7 @@ static void ext4_put_super(struct super_block *sb)
lock_super(sb);
lock_kernel();
if (sb->s_dirt)
- ext4_write_super(sb);
+ ext4_commit_super(sb, 1);
ext4_release_system_zone(sb);
ext4_mb_release(sb);
@@ -3336,7 +3336,9 @@ int ext4_force_commit(struct super_block *sb)
static void ext4_write_super(struct super_block *sb)
{
+ lock_super(sb);
ext4_commit_super(sb, 1);
+ unlock_super(sb);
}
static int ext4_sync_fs(struct super_block *sb, int wait)