time: Move compat_gettimeofday()/settimeofday() to native

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20170607084241.28657-16-viro@ZenIV.linux.org.uk

kernel/compat.c

@@ -92,44 +92,6 @@ int compat_put_timex(struct compat_timex __user *utp, const struct timex *txc)
 	return 0;
 }
 
-COMPAT_SYSCALL_DEFINE2(gettimeofday, struct compat_timeval __user *, tv,
-		       struct timezone __user *, tz)
-{
-	if (tv) {
-		struct timeval ktv;
-		do_gettimeofday(&ktv);
-		if (compat_put_timeval(&ktv, tv))
-			return -EFAULT;
-	}
-	if (tz) {
-		if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
-			return -EFAULT;
-	}
-
-	return 0;
-}
-
-COMPAT_SYSCALL_DEFINE2(settimeofday, struct compat_timeval __user *, tv,
-		       struct timezone __user *, tz)
-{
-	struct timespec64 new_ts;
-	struct timeval user_tv;
-	struct timezone new_tz;
-
-	if (tv) {
-		if (compat_get_timeval(&user_tv, tv))
-			return -EFAULT;
-		new_ts.tv_sec = user_tv.tv_sec;
-		new_ts.tv_nsec = user_tv.tv_usec * NSEC_PER_USEC;
-	}
-	if (tz) {
-		if (copy_from_user(&new_tz, tz, sizeof(*tz)))
-			return -EFAULT;
-	}
-
-	return do_sys_settimeofday64(tv ? &new_ts : NULL, tz ? &new_tz : NULL);
-}
-
 static int __compat_get_timeval(struct timeval *tv, const struct compat_timeval __user *ctv)
 {
 	return (!access_ok(VERIFY_READ, ctv, sizeof(*ctv)) ||

kernel/time/time.c

@@ -257,6 +257,47 @@ SYSCALL_DEFINE2(settimeofday, struct timeval __user *, tv,
 	return do_sys_settimeofday64(tv ? &new_ts : NULL, tz ? &new_tz : NULL);
 }
 
+#ifdef CONFIG_COMPAT
+COMPAT_SYSCALL_DEFINE2(gettimeofday, struct compat_timeval __user *, tv,
+		       struct timezone __user *, tz)
+{
+	if (tv) {
+		struct timeval ktv;
+
+		do_gettimeofday(&ktv);
+		if (compat_put_timeval(&ktv, tv))
+			return -EFAULT;
+	}
+	if (tz) {
+		if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
+			return -EFAULT;
+	}
+
+	return 0;
+}
+
+COMPAT_SYSCALL_DEFINE2(settimeofday, struct compat_timeval __user *, tv,
+		       struct timezone __user *, tz)
+{
+	struct timespec64 new_ts;
+	struct timeval user_tv;
+	struct timezone new_tz;
+
+	if (tv) {
+		if (compat_get_timeval(&user_tv, tv))
+			return -EFAULT;
+		new_ts.tv_sec = user_tv.tv_sec;
+		new_ts.tv_nsec = user_tv.tv_usec * NSEC_PER_USEC;
+	}
+	if (tz) {
+		if (copy_from_user(&new_tz, tz, sizeof(*tz)))
+			return -EFAULT;
+	}
+
+	return do_sys_settimeofday64(tv ? &new_ts : NULL, tz ? &new_tz : NULL);
+}
+#endif
+
 SYSCALL_DEFINE1(adjtimex, struct timex __user *, txc_p)
 {
 	struct timex txc;		/* Local copy of parameter */