kernel/reboot.c: convert simple_strtoul to kstrtoint

Replace obsolete function.
kstrtoint is used as reboot_cpu is an integer.
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

kernel/reboot.c

@@ -388,15 +388,22 @@ static int __init reboot_setup(char *str)
 			break;
 
 		case 's':
-			if (isdigit(*(str+1)))
-				reboot_cpu = simple_strtoul(str+1, NULL, 0);
-			else if (str[1] == 'm' && str[2] == 'p' &&
-							isdigit(*(str+3)))
-				reboot_cpu = simple_strtoul(str+3, NULL, 0);
-			else
+		{
+			int rc;
+
+			if (isdigit(*(str+1))) {
+				rc = kstrtoint(str+1, 0, &reboot_cpu);
+				if (rc)
+					return rc;
+			} else if (str[1] == 'm' && str[2] == 'p' &&
+				   isdigit(*(str+3))) {
+				rc = kstrtoint(str+3, 0, &reboot_cpu);
+				if (rc)
+					return rc;
+			} else
 				reboot_mode = REBOOT_SOFT;
 			break;
-
+		}
 		case 'g':
 			reboot_mode = REBOOT_GPIO;
 			break;