Btrfs: Use assert_spin_locked instead of spin_trylock

On UP systems spin_trylock always succeeds

Signed-off-by: Chris Mason <chris.mason@oracle.com>

diff --git a/fs/btrfs/extent_map.c b/fs/btrfs/extent_map.c
index 8a502ee..954b047 100644 (file)
--- a/fs/btrfs/extent_map.c
+++ b/fs/btrfs/extent_map.c
@@ -208,7 +208,7 @@ int add_extent_mapping(struct extent_map_tree *tree,
        struct extent_map *merge = NULL;
        struct rb_node *rb;
 
-       BUG_ON(spin_trylock(&tree->lock));
+       assert_spin_locked(&tree->lock);
        rb = tree_insert(&tree->map, em->start, &em->rb_node);
        if (rb) {
                ret = -EEXIST;
@@ -270,7 +270,7 @@ struct extent_map *lookup_extent_mapping(struct extent_map_tree *tree,
        struct rb_node *next = NULL;
        u64 end = range_end(start, len);
 
-       BUG_ON(spin_trylock(&tree->lock));
+       assert_spin_locked(&tree->lock);
        rb_node = __tree_search(&tree->map, start, &prev, &next);
        if (!rb_node && prev) {
                em = rb_entry(prev, struct extent_map, rb_node);
@@ -317,7 +317,7 @@ int remove_extent_mapping(struct extent_map_tree *tree, struct extent_map *em)
        int ret = 0;
 
        WARN_ON(test_bit(EXTENT_FLAG_PINNED, &em->flags));
-       BUG_ON(spin_trylock(&tree->lock));
+       assert_spin_locked(&tree->lock);
        rb_erase(&em->rb_node, &tree->map);
        em->in_tree = 0;
        return ret;