diff --git a/mm/swapfile.c b/mm/swapfile.c
index 2c33ff456ed5e2..b2a2e45c9a36f1 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -3157,7 +3157,7 @@ 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;