On uniprocessor kernels without spinlock debugging, spinlock operations
are all no-ops and spin_trylock() will always succeed.
These BUG_ON() sanity checks are effectively an unconditional BUG() in
that case.
Signed-off-by: David Woodhouse <David.Woodhouse@xxxxxxxxx>
diff --git a/extent_map.c b/extent_map.c
index 71b1ac1..6a72961 100644
--- a/extent_map.c
+++ b/extent_map.c
@@ -209,7 +209,6 @@ int add_extent_mapping(struct extent_map_tree *tree,
struct extent_map *merge = NULL;
struct rb_node *rb;
- BUG_ON(spin_trylock(&tree->lock));
rb = tree_insert(&tree->map, em->start, &em->rb_node);
if (rb) {
ret = -EEXIST;
@@ -272,7 +271,6 @@ 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));
em = tree->last;
if (em && end > em->start && start < extent_map_end(em))
goto found;
@@ -324,7 +322,6 @@ 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));
rb_erase(&em->rb_node, &tree->map);
em->in_tree = 0;
if (tree->last == em)
--
David Woodhouse Open Source Technology Centre
David.Woodhouse@xxxxxxxxx Intel Corporation
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