[PATCH 3/3] btrfs: ctree: Remove stalled comment of setting up path lock

[Qu Wenruo <wqu@suse.com>]

The following comment shows up in btrfs_search_slot() with out much
sense:

	/*
	 * setup the path here so we can release it under lock
	 * contention with the cow code
	 */
	if (cow) {
		/* code touching path->lock[] is far away from here */
	}

It turns out that just some stalled comment which is not cleaned up
properly.

The original code is introduced in commit 65b51a009e29
("btrfs_search_slot: reduce lock contention by cowing in two stages"):
+
+               /*
+                * setup the path here so we can release it under lock
+                * contention with the cow code
+                */
+               p->nodes[level] = b;
+               if (!p->skip_locking)
+                       p->locks[level] = 1;
+

But in current code base, we have different timing modifying path lock,
so just remove that stalled comment.

Signed-off-by: Qu Wenruo <wqu@suse.com>
---
 fs/btrfs/ctree.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 3be8b32c0d37..a2e264190eee 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -2764,10 +2764,6 @@ int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root,
 		int dec = 0;
 		level = btrfs_header_level(b);
 
-		/*
-		 * setup the path here so we can release it under lock
-		 * contention with the cow code
-		 */
 		if (cow) {
 			bool last_level = (level == (BTRFS_MAX_LEVEL - 1));
 
-- 
2.23.0