diff options
Diffstat (limited to 'fs/btrfs/extent_io.c')
| -rw-r--r-- | fs/btrfs/extent_io.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index d11e1d192784..21d2cb7f538e 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -3486,10 +3486,13 @@ void free_extent_buffer(struct extent_buffer *eb) refs = atomic_read(&eb->refs); while (1) { - if ((!test_bit(EXTENT_BUFFER_UNMAPPED, &eb->bflags) && refs <= 3) - || (test_bit(EXTENT_BUFFER_UNMAPPED, &eb->bflags) && - refs == 1)) + if (test_bit(EXTENT_BUFFER_UNMAPPED, &eb->bflags)) { + if (refs == 1) + break; + } else if (refs <= 3) { break; + } + if (atomic_try_cmpxchg(&eb->refs, &refs, refs - 1)) return; } |