fix osf_wait4() breakage

kernel_wait4() expects a userland address for status - it's only rusage that goes as a kernel one (and needs a copyout afterwards)

---

index 6e921754c8fc..c210a25dd6da 100644
@@ -1180,13 +1180,10 @@ SYSCALL_DEFINE2(osf_getrusage, int, who, struct rusage32 __user *, ru)
 SYSCALL_DEFINE4(osf_wait4, pid_t, pid, int __user *, ustatus, int, options,
 		struct rusage32 __user *, ur)
 {
-	unsigned int status = 0;
 	struct rusage r;
-	long err = kernel_wait4(pid, &status, options, &r);
+	long err = kernel_wait4(pid, ustatus, options, &r);
 	if (err <= 0)
 		return err;
-	if (put_user(status, ustatus))
-		return -EFAULT;
 	if (!ur)
 		return err;
 	if (put_tv_to_tv32(&ur->ru_utime, &r.ru_utime))

Applied.

Just a note:

Please put the actual commit ID there too, because that's what people with automation check.

.. and when you do that, you'll see that it wasn't actually in 4.12, but got merged during the 4.13 merge window:

    $ git name-rev 92ebce5ac55d
    92ebce5ac55d tags/v4.13-rc1~154^2

(unless it was backported, but I don't think it was).

Also, the prototype for kernel_wait4() (in <linux/sched/task.h>) is wrong, and doesn't have the __user annotation.

Linus