btrfs: remove stale comment about locking at btrfs_search_slot()

The comment refers to the old extent buffer locking code, where we used to
have custom locks that had blocking and spinning behaviour modes. That is
not the case anymore, since we have transitioned to rw semaphores, so the
comment does not offer any value anymore. Remove it.

Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 36fc76678e309aa863ebdce5ef57cb55c4d7bfb7..defc494a2d083a71f8365ac9074fd3946f63a80d 100644 (file)
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -1964,10 +1964,6 @@ again:
                }
 cow_done:
                p->nodes[level] = b;
-               /*
-                * Leave path with blocking locks to avoid massive
-                * lock context switch, this is made on purpose.
-                */
 
                /*
                 * we have a lock on b and as long as we aren't changing