[PATCH v2 11/12] btrfs: add assert to search functions

[Stefan Roesch <shr@fb.com>]

This adds warnings to search functions, which should not have the nowait
flag set when called.

Signed-off-by: Stefan Roesch <shr@fb.com>
---
 fs/btrfs/ctree.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 71b238364939..9caf0f87cbcb 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -2165,6 +2165,9 @@ int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key,
 	lowest_level = p->lowest_level;
 	WARN_ON(p->nodes[0] != NULL);
 
+	if (WARN_ON_ONCE(p->nowait == 1))
+		return -EINVAL;
+
 	if (p->search_commit_root) {
 		BUG_ON(time_seq);
 		return btrfs_search_slot(NULL, root, key, p, 0, 0);
@@ -4465,6 +4468,9 @@ int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
 	int ret = 1;
 	int keep_locks = path->keep_locks;
 
+	if (WARN_ON_ONCE(path->nowait == 1))
+		return -EINVAL;
+
 	path->keep_locks = 1;
 again:
 	cur = btrfs_read_lock_root_node(root);
@@ -4645,6 +4651,9 @@ int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
 	int ret;
 	int i;
 
+	if (WARN_ON_ONCE(path->nowait == 1))
+		return -EINVAL;
+
 	nritems = btrfs_header_nritems(path->nodes[0]);
 	if (nritems == 0)
 		return 1;
-- 
2.30.2