Increase extent buffer's reference count while holding the lock. Otherwise it can race with try_release_extent_buffer.
Signed-off-by: Yan Zheng <[email protected]> --- diff -urp 1/fs/btrfs/extent_io.c 2/fs/btrfs/extent_io.c --- 1/fs/btrfs/extent_io.c 2010-01-17 15:48:16.770302026 +0800 +++ 2/fs/btrfs/extent_io.c 2010-02-04 16:37:45.704800682 +0800 @@ -3165,10 +3165,9 @@ struct extent_buffer *alloc_extent_buffe spin_unlock(&tree->buffer_lock); goto free_eb; } - spin_unlock(&tree->buffer_lock); - /* add one reference for the tree */ atomic_inc(&eb->refs); + spin_unlock(&tree->buffer_lock); return eb; free_eb: -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
