Re: [PATCH 4/6] powerpc/kernel: Clean up some sparse warnings

diff --git a/arch/powerpc/kernel/io.c b/arch/powerpc/kernel/io.c
index 2a2b4aeab80f..3f70b7dccee8 100644
--- a/arch/powerpc/kernel/io.c
+++ b/arch/powerpc/kernel/io.c

@@ -37,7 +37,7 @@ void _insb(const volatile u8 __iomem *port, void *buf, long count)
 		return;
 	asm volatile("sync");
 	do {
-		tmp = *port;
+		tmp = *(u8 __force *)port;
 		eieio();
 		*tbuf++ = tmp;
 	} while (--count != 0);

@@ -47,13 +47,13 @@ EXPORT_SYMBOL(_insb);
 
 void _outsb(volatile u8 __iomem *port, const void *buf, long count)
 {
-	const u8 *tbuf = buf;
+	const u8 __force *tbuf = buf;
 
 	if (unlikely(count <= 0))
 		return;
 	asm volatile("sync");
 	do {
-		*port = *tbuf++;
+		*(volatile u8 __force *)port = *tbuf++;
 	} while (--count != 0);
 	asm volatile("sync");
 }

@@ -68,7 +68,7 @@ void _insw_ns(const volatile u16 __iomem *port, void *buf, long count)
 		return;
 	asm volatile("sync");
 	do {
-		tmp = *port;
+		tmp = *(u16 __force *)port;
 		eieio();
 		*tbuf++ = tmp;
 	} while (--count != 0);

@@ -99,7 +99,7 @@ void _insl_ns(const volatile u32 __iomem *port, void *buf, long count)
 		return;
 	asm volatile("sync");
 	do {
-		tmp = *port;
+		tmp = *(u32 __force *)port;
 		eieio();
 		*tbuf++ = tmp;
 	} while (--count != 0);