[ARM PATCH] 1964/1: Wrong cache block operations checking

Patch from Catalin Marinas

The "err" is rotated in the blockops_check() function and all the error bits are cleared, the subsequent conditions being always true.

arch/arm/mm/blockops.c

@@ -130,6 +130,7 @@ static struct undef_hook blockops_hook __initdata = {
 static int __init blockops_check(void)
 {
 	register unsigned int err asm("r4") = 0;
+	unsigned int err_pos = 1;
 	unsigned int cache_type;
 	int i;
 
@@ -156,8 +157,8 @@ static int __init blockops_check(void)
 
 	unregister_undef_hook(&blockops_hook);
 
-	for (i = 0; i < ARRAY_SIZE(func); i++, err >>= 1)
-		printk("%30s: %ssupported\n", func[i], err & 1 ? "not " : "");
+	for (i = 0; i < ARRAY_SIZE(func); i++, err_pos <<= 1)
+		printk("%30s: %ssupported\n", func[i], err & err_pos ? "not " : "");
 
 	if ((err & 8) == 0) {
 		printk(" --> Using %s block cache invalidate\n",