riscv: checkpatch: Fix Macro argument reuse

It is CHECK reported by checkpatch.pl
CHECK: Macro argument reuse 'PTE' - possible side-effects?

Signed-off-by: Rick Chen <rick@andestech.com>
Signed-off-by: Rick Chen <rickchen36@gmail.com>
diff --git a/arch/riscv/include/asm/string.h b/arch/riscv/include/asm/string.h
index 038cdae..0fc3424 100644
--- a/arch/riscv/include/asm/string.h
+++ b/arch/riscv/include/asm/string.h
@@ -26,8 +26,11 @@
 #undef __HAVE_ARCH_MEMSET
 
 #ifdef CONFIG_MARCO_MEMSET
-#define memset(p, v, n)							\
-	({								\
+#define memset(_p, _v, _n)	\
+	(typeof(_p) (p) = (_p); \
+	 typeof(_v) (v) = (_v); \
+	 typeof(_n) (n) = (_n); \
+	 {								\
 		if ((n) != 0) {						\
 			if (__builtin_constant_p((v)) && (v) == 0)	\
 				__memzero((p), (n));			\
@@ -37,7 +40,10 @@
 		(p);							\
 	})
 
-#define memzero(p, n) ({ if ((n) != 0) __memzero((p), (n)); (p); })
+#define memzero(_p, _n) \
+	(typeof(_p) (p) = (_p); \
+	 typeof(_n) (n) = (_n); \
+	 { if ((n) != 0) __memzero((p), (n)); (p); })
 #endif
 
 #endif /* __ASM_RISCV_STRING_H */