diff --git a/mm/swapfile.c b/mm/swapfile.c
index c03de4f1ee770222d588c731ab165ca5d7f482e2..074a724df169d5fd6cc39841f7c74f156e9a3edd 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -3259,7 +3259,7 @@ SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags)
 	mapping = swap_file->f_mapping;
 	inode = mapping->host;
 
-	/* If S_ISREG(inode->i_mode) will do inode_lock(inode); */
+	/* will take i_rwsem; */
 	error = claim_swapfile(p, inode);
 	if (unlikely(error))
 		goto bad_swap;