ext4 crypto: fix sparse warnings in fs/ext4/ioctl.c

[ Added another sparse fix for EXT4_IOC_GET_ENCRYPTION_POLICY while
  we're at it. --tytso ]

Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

fs/ext4/ioctl.c

@@ -675,8 +675,8 @@ long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 			if (err)
 				return err;
 		}
-		if (copy_to_user((void *) arg, sbi->s_es->s_encrypt_pw_salt,
-				 16))
+		if (copy_to_user((void __user *) arg,
+				 sbi->s_es->s_encrypt_pw_salt, 16))
 			return -EFAULT;
 		return 0;
 	}
@@ -690,7 +690,7 @@ long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 		err = ext4_get_policy(inode, &policy);
 		if (err)
 			return err;
-		if (copy_to_user((void *)arg, &policy, sizeof(policy)))
+		if (copy_to_user((void __user *)arg, &policy, sizeof(policy)))
 			return -EFAULT;
 		return 0;
 #else