init: mark __user address space on string literals

When calling syscall service routines in kernel, some of arguments should
be user pointers but were missing __user markup on string literals.  Add
it.  Removes some sparse warnings.

Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Cc: Phillip Lougher <phillip@lougher.demon.co.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

init/do_mounts.c

@@ -291,7 +291,7 @@ static int __init do_mount_root(char *name, char *fs, int flags, void *data)
 	if (err)
 		return err;
 
-	sys_chdir("/root");
+	sys_chdir((const char __user __force *)"/root");
 	ROOT_DEV = current->fs->pwd.mnt->mnt_sb->s_dev;
 	printk("VFS: Mounted root (%s filesystem)%s on device %u:%u.\n",
 	       current->fs->pwd.mnt->mnt_sb->s_type->name,
@@ -488,5 +488,5 @@ void __init prepare_namespace(void)
 out:
 	devtmpfs_mount("dev");
 	sys_mount(".", "/", NULL, MS_MOVE, NULL);
-	sys_chroot(".");
+	sys_chroot((const char __user __force *)".");
 }

init/do_mounts_md.c

@@ -283,7 +283,7 @@ static void __init autodetect_raid(void)
 
 	wait_for_device_probe();
 
-	fd = sys_open("/dev/md0", 0, 0);
+	fd = sys_open((const char __user __force *) "/dev/md0", 0, 0);
 	if (fd >= 0) {
 		sys_ioctl(fd, RAID_AUTORUN, raid_autopart);
 		sys_close(fd);

init/do_mounts_rd.c

@@ -168,7 +168,7 @@ int __init rd_load_image(char *from)
 	char rotator[4] = { '|' , '/' , '-' , '\\' };
 #endif
 
-	out_fd = sys_open("/dev/ram", O_RDWR, 0);
+	out_fd = sys_open((const char __user __force *) "/dev/ram", O_RDWR, 0);
 	if (out_fd < 0)
 		goto out;
 
@@ -267,7 +267,7 @@ noclose_input:
 	sys_close(out_fd);
 out:
 	kfree(buf);
-	sys_unlink("/dev/ram");
+	sys_unlink((const char __user __force *) "/dev/ram");
 	return res;
 }
 

init/initramfs.c

@@ -528,7 +528,7 @@ static void __init clean_rootfs(void)
 	struct linux_dirent64 *dirp;
 	int num;
 
-	fd = sys_open("/", O_RDONLY, 0);
+	fd = sys_open((const char __user __force *) "/", O_RDONLY, 0);
 	WARN_ON(fd < 0);
 	if (fd < 0)
 		return;
@@ -590,7 +590,8 @@ static int __init populate_rootfs(void)
 		}
 		printk(KERN_INFO "rootfs image is not initramfs (%s)"
 				"; looks like an initrd\n", err);
-		fd = sys_open("/initrd.image", O_WRONLY|O_CREAT, 0700);
+		fd = sys_open((const char __user __force *) "/initrd.image",
+			      O_WRONLY|O_CREAT, 0700);
 		if (fd >= 0) {
 			sys_write(fd, (char *)initrd_start,
 					initrd_end - initrd_start);

init/noinitramfs.c

@@ -29,17 +29,17 @@ static int __init default_rootfs(void)
 {
 	int err;
 
-	err = sys_mkdir("/dev", 0755);
+	err = sys_mkdir((const char __user __force *) "/dev", 0755);
 	if (err < 0)
 		goto out;
 
-	err = sys_mknod((const char __user *) "/dev/console",
+	err = sys_mknod((const char __user __force *) "/dev/console",
 			S_IFCHR | S_IRUSR | S_IWUSR,
 			new_encode_dev(MKDEV(5, 1)));
 	if (err < 0)
 		goto out;
 
-	err = sys_mkdir("/root", 0700);
+	err = sys_mkdir((const char __user __force *) "/root", 0700);
 	if (err < 0)
 		goto out;