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authorTheodore Ts'o <tytso@mit.edu>2009-05-01 01:59:42 -0400
committerTheodore Ts'o <tytso@mit.edu>2009-05-01 01:59:42 -0400
commita63c9eb2ce6f5028da90f282798232c4f398ceb8 (patch)
tree3b32193dfc80a3925f5ea5a6545765f5176a6f2d /fs/ext4
parent114e9fc90703bd6aac0229fb559e97caa6c49770 (diff)
downloadop-kernel-dev-a63c9eb2ce6f5028da90f282798232c4f398ceb8.zip
op-kernel-dev-a63c9eb2ce6f5028da90f282798232c4f398ceb8.tar.gz
ext4: ext4_mark_recovery_complete() doesn't need to use lock_super
The function ext4_mark_recovery_complete() is called from two call paths: either (a) while mounting the filesystem, in which case there's no danger of any other CPU calling write_super() until the mount is completed, and (b) while remounting the filesystem read-write, in which case the fs core has already locked the superblock. This also allows us to take out a very vile unlock_super()/lock_super() pair in ext4_remount(). Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4')
-rw-r--r--fs/ext4/super.c11
1 files changed, 1 insertions, 10 deletions
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index e3b35f2..45d0ada 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -3219,13 +3219,11 @@ static void ext4_mark_recovery_complete(struct super_block *sb,
if (jbd2_journal_flush(journal) < 0)
goto out;
- lock_super(sb);
if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) &&
sb->s_flags & MS_RDONLY) {
EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER);
ext4_commit_super(sb, 1);
}
- unlock_super(sb);
out:
jbd2_journal_unlock_updates(journal);
@@ -3436,15 +3434,8 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data)
(sbi->s_mount_state & EXT4_VALID_FS))
es->s_state = cpu_to_le16(sbi->s_mount_state);
- /*
- * We have to unlock super so that we can wait for
- * transactions.
- */
- if (sbi->s_journal) {
- unlock_super(sb);
+ if (sbi->s_journal)
ext4_mark_recovery_complete(sb, es);
- lock_super(sb);
- }
} else {
int ret;
if ((ret = EXT4_HAS_RO_COMPAT_FEATURE(sb,
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