Annotate sys_nfsservctl() with user pointer annotations

fs/nfsctl.c

@@ -87,10 +87,10 @@ static struct {
 };
 
 long
-asmlinkage sys_nfsservctl(int cmd, struct nfsctl_arg *arg, void *res)
+asmlinkage sys_nfsservctl(int cmd, struct nfsctl_arg __user *arg, void __user *res)
 {
 	struct file *file;
-	void *p = &arg->u;
+	void __user *p = &arg->u;
 	int version;
 	int err;
 

include/linux/nfsd/syscall.h

@@ -116,7 +116,7 @@ union nfsctl_res {
 /*
  * Kernel syscall implementation.
  */
-extern asmlinkage long	sys_nfsservctl(int, struct nfsctl_arg *, void *);
+extern asmlinkage long	sys_nfsservctl(int, struct nfsctl_arg __user *, void __user *);
 extern int		exp_addclient(struct nfsctl_client *ncp);
 extern int		exp_delclient(struct nfsctl_client *ncp);
 extern int		exp_export(struct nfsctl_export *nxp);