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| author |   Qu Wenruo <quwenruo@cn.fujitsu.com> | 2015-01-20 17:05:33 +0800 |
|---|---|---|
| committer |   Chris Mason <clm@fb.com> | 2015-01-20 17:19:40 -0800 |
| commit | 6c9fe14f9d64cc12401a825a60ec5c5723496ca4 (patch) | |
| tree | 903739c5be570df4074584df413b10eaf917b536 /fs/btrfs | |
| parent | btrfs: fix state->private cast on 32 bit machines (diff) | |
| download | linux-dev-6c9fe14f9d64cc12401a825a60ec5c5723496ca4.tar.xz linux-dev-6c9fe14f9d64cc12401a825a60ec5c5723496ca4.zip | |
btrfs: Fix the bug that fs_info->pending_changes is never cleared.
Fs_info->pending_changes is never cleared since the original code uses
cmpxchg(&fs_info->pending_changes, 0, 0), which will only clear it if
pending_changes is already 0.
This will cause a lot of problem when mount it with inode_cache mount
option.
If the btrfs is mounted as inode_cache, pending_changes will always be
1, even when the fs is frozen.
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Reviewed-by: David Sterba <dsterba@suse.cz>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>
Diffstat (limited to 'fs/btrfs')
| -rw-r--r-- | fs/btrfs/transaction.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c index a605d4e2f2bc..e88b59d13439 100644 --- a/fs/btrfs/transaction.c +++ b/fs/btrfs/transaction.c @@ -2118,7 +2118,7 @@ void btrfs_apply_pending_changes(struct btrfs_fs_info *fs_info) unsigned long prev; unsigned long bit; - prev = cmpxchg(&fs_info->pending_changes, 0, 0); + prev = xchg(&fs_info->pending_changes, 0); if (!prev) return; |