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| author | Miao Xie <miaox@cn.fujitsu.com> | 2013-01-15 07:27:25 +0100 |
|---|---|---|
| committer | Josef Bacik <jbacik@fusionio.com> | 2013-01-24 18:51:23 +0100 |
| commit | 8d25a086eb104297e3ba1fdd180b04cfaaa84797 (patch) | |
| tree | 075e3a0e731b08a418ad65dfd4e0bb53818a40c1 /fs/btrfs/transaction.c | |
| parent | Btrfs: put csums on the right ordered extent (diff) | |
| download | linux-8d25a086eb104297e3ba1fdd180b04cfaaa84797.tar.xz linux-8d25a086eb104297e3ba1fdd180b04cfaaa84797.zip | |
Btrfs: Add ACCESS_ONCE() to transaction->abort accesses
We may access and update transaction->aborted on the different CPUs without
lock, so we need ACCESS_ONCE() wrapper to prevent the compiler from creating
unsolicited accesses and make sure we can get the right value.
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Diffstat (limited to '')
| -rw-r--r-- | fs/btrfs/transaction.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c index 87fac9a21ea5..0ef29611fade 100644 --- a/fs/btrfs/transaction.c +++ b/fs/btrfs/transaction.c @@ -1468,7 +1468,8 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans, goto cleanup_transaction; } - if (cur_trans->aborted) { + /* Stop the commit early if ->aborted is set */ + if (unlikely(ACCESS_ONCE(cur_trans->aborted))) { ret = cur_trans->aborted; goto cleanup_transaction; } |