Btrfs: switch extent_map to a rw lock

[net-next-2.6.git] / fs / btrfs / extent_io.c

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 8d7a152a90c666277ef3e2b480466b0f8bf4d126..41cf1b451b412ce5defdbab88b00aa2d320144cd 100644 (file)
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -2786,15 +2786,15 @@ int try_release_extent_mapping(struct extent_map_tree *map,
                u64 len;
                while (start <= end) {
                        len = end - start + 1;
-                       spin_lock(&map->lock);
+                       write_lock(&map->lock);
                        em = lookup_extent_mapping(map, start, len);
                        if (!em || IS_ERR(em)) {
-                               spin_unlock(&map->lock);
+                               write_unlock(&map->lock);
                                break;
                        }
                        if (test_bit(EXTENT_FLAG_PINNED, &em->flags) ||
                            em->start != start) {
-                               spin_unlock(&map->lock);
+                               write_unlock(&map->lock);
                                free_extent_map(em);
                                break;
                        }
@@ -2808,7 +2808,7 @@ int try_release_extent_mapping(struct extent_map_tree *map,
                                free_extent_map(em);
                        }
                        start = extent_map_end(em);
-                       spin_unlock(&map->lock);
+                       write_unlock(&map->lock);
 
                        /* once for us */
                        free_extent_map(em);