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Diffstat (limited to 'fs/btrfs/compression.c')
| -rw-r--r-- | fs/btrfs/compression.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c index b524e02d8cfb..97b049ad0594 100644 --- a/fs/btrfs/compression.c +++ b/fs/btrfs/compression.c @@ -841,6 +841,9 @@ static void free_workspace(int type, struct list_head *workspace) btrfs_compress_op[idx]->free_workspace(workspace); atomic_dec(alloc_ws); wake: + /* + * Make sure counter is updated before we wake up waiters. + */ smp_mb(); if (waitqueue_active(ws_wait)) wake_up(ws_wait); |