Btrfs: Return value checking in module init
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/extent_map.c b/fs/btrfs/extent_map.c
index b3ff63c..f91f28e 100644
--- a/fs/btrfs/extent_map.c
+++ b/fs/btrfs/extent_map.c
@@ -42,18 +42,30 @@
struct extent_map_tree *tree;
get_extent_t *get_extent;
};
-
-void __init extent_map_init(void)
+int __init extent_map_init(void)
{
extent_map_cache = btrfs_cache_create("extent_map",
sizeof(struct extent_map), 0,
NULL);
+ if (!extent_map_cache)
+ return -ENOMEM;
extent_state_cache = btrfs_cache_create("extent_state",
sizeof(struct extent_state), 0,
NULL);
+ if (!extent_state_cache)
+ goto free_map_cache;
extent_buffer_cache = btrfs_cache_create("extent_buffers",
sizeof(struct extent_buffer), 0,
NULL);
+ if (!extent_buffer_cache)
+ goto free_state_cache;
+ return 0;
+
+free_state_cache:
+ kmem_cache_destroy(extent_state_cache);
+free_map_cache:
+ kmem_cache_destroy(extent_map_cache);
+ return -ENOMEM;
}
void __exit extent_map_exit(void)