Btrfs: Use map_private_extent_buffer during generic_bin_search

[linux-2.6-omap-h63xx.git] / fs / btrfs / extent_io.c

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 7449ecf32c506ae69b46a7e1cdf3e01150a10a47..607f5ff2791c09c623886fcf40e6aa595b134ecf 100644 (file)
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -3471,6 +3471,7 @@ int map_extent_buffer(struct extent_buffer *eb, unsigned long start,
                unmap_extent_buffer(eb, eb->map_token, km);
                eb->map_token = NULL;
                save = 1;
+               WARN_ON(!mutex_is_locked(&eb->mutex));
        }
        err = map_private_extent_buffer(eb, start, min_len, token, map,
                                       map_start, map_len, km);