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authorDavid Sterba <dsterba@suse.com>2019-03-27 18:19:55 +0300
committerDavid Sterba <dsterba@suse.com>2019-07-02 13:30:47 +0300
commit38e9372e391deabf19c76c88b59b5e16f304627a (patch)
tree0e648b96e037425d587abc6b7ab4cd0086815aa3 /fs/btrfs/delayed-ref.c
parent93ead46b038037cd717cf46c9170af2531a6eb58 (diff)
downloadlinux-38e9372e391deabf19c76c88b59b5e16f304627a.tar.xz
btrfs: assert delayed ref lock in btrfs_find_delayed_ref_head
Turn the comment about required lock into an assertion. Reviewed-by: Nikolay Borisov <nborisov@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/delayed-ref.c')
-rw-r--r--fs/btrfs/delayed-ref.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/fs/btrfs/delayed-ref.c b/fs/btrfs/delayed-ref.c
index a73fc23e2961..a94fae897b3f 100644
--- a/fs/btrfs/delayed-ref.c
+++ b/fs/btrfs/delayed-ref.c
@@ -957,13 +957,14 @@ int btrfs_add_delayed_extent_op(struct btrfs_trans_handle *trans,
}
/*
- * this does a simple search for the head node for a given extent.
- * It must be called with the delayed ref spinlock held, and it returns
- * the head node if any where found, or NULL if not.
+ * This does a simple search for the head node for a given extent. Returns the
+ * head node if found, or NULL if not.
*/
struct btrfs_delayed_ref_head *
btrfs_find_delayed_ref_head(struct btrfs_delayed_ref_root *delayed_refs, u64 bytenr)
{
+ lockdep_assert_held(&delayed_refs->lock);
+
return find_ref_head(delayed_refs, bytenr, false);
}