Fix comments

abce9b81 · Jindong Zhang · 4f2d3814 · abce9b81
--- a/memlayout.h
+++ b/memlayout.h
@@ -19,4 +19,4 @@ static inline void *p2v(uint a) { return (void *) ((a) + KERNBASE); }
 #define P2V(a) (((void *) (a)) + KERNBASE)

 #define V2P_WO(x) ((x) - KERNBASE)    // same as V2P, but without casts
-#define P2V_WO(x) ((x) + KERNBASE)    // same as V2P, but without casts
+#define P2V_WO(x) ((x) + KERNBASE)    // same as P2V, but without casts