x86, olpc: Constify an olpc_ofw() arg

The arguments passed to OFW shouldn't be modified; update the 'args'
argument of olpc_ofw to reflect this.  This saves us some later
casting away of consts.
Signed-off-by: Andres Salomon <dilinger@queued.net>
LKML-Reference: <20100628220029.1555ac24@debian>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

arch/x86/include/asm/olpc_ofw.h

@@ -12,7 +12,7 @@
 #define olpc_ofw(name, args, res) \
 	__olpc_ofw((name), ARRAY_SIZE(args), args, ARRAY_SIZE(res), res)
 
-extern int __olpc_ofw(const char *name, int nr_args, void **args, int nr_res,
+extern int __olpc_ofw(const char *name, int nr_args, const void **args, int nr_res,
 		void **res);
 
 /* determine whether OFW is available and lives in the proper memory */

arch/x86/kernel/olpc.c

@@ -188,7 +188,7 @@ static void __init platform_detect(void)
 {
 	size_t propsize;
 	__be32 rev;
-	void *args[] = { NULL, "board-revision-int", &rev, (void *)4 };
+	const void *args[] = { NULL, "board-revision-int", &rev, (void *)4 };
 	void *res[] = { &propsize };
 
 	if (olpc_ofw("getprop", args, res) || propsize != 4) {

arch/x86/kernel/olpc_ofw.c

@@ -40,7 +40,7 @@ void __init setup_olpc_ofw_pgd(void)
 	early_iounmap(base, sizeof(olpc_ofw_pgd) * PTRS_PER_PGD);
 }
 
-int __olpc_ofw(const char *name, int nr_args, void **args, int nr_res,
+int __olpc_ofw(const char *name, int nr_args, const void **args, int nr_res,
 		void **res)
 {
 	int ofw_args[MAXARGS + 3];