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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>
This commit is contained in:
David Woodhouse 2008-07-24 10:09:43 -04:00 committed by Chris Mason
parent b3c3da71ed
commit 64f26f7450
1 changed files with 3 additions and 3 deletions
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6
fs/btrfs/extent_map.c
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@ -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;