[tip:timers/core] time: Use ktime_get_real_seconds() in time syscall

[tip-bot for Arnd Bergmann]

Commit-ID:  f5a89295e2f566d8e9f1d4f3d524d8d3c966958c
Gitweb:     https://git.kernel.org/tip/f5a89295e2f566d8e9f1d4f3d524d8d3c966958c
Author:     Arnd Bergmann <arnd@xxxxxxxx>
AuthorDate: Mon, 18 Jun 2018 16:08:00 +0200
Committer:  Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Tue, 19 Jun 2018 09:56:26 +0200

time: Use ktime_get_real_seconds() in time syscall

Both get_seconds() and do_gettimeofday() are deprecated. Change the time()
implementation to use the replacement function instead.

Obviously the system call will still overflow in 2038, but this gets us
closer to removing the old helper functions.

Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: John Stultz <john.stultz@xxxxxxxxxx>
Cc: y2038@xxxxxxxxxxxxxxxx
Cc: Stephen Boyd <sboyd@xxxxxxxxxx>
Cc: Deepa Dinamani <deepa.kernel@xxxxxxxxx>
Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Link: https://lkml.kernel.org/r/20180618140811.2998503-2-arnd@xxxxxxxx

---
 kernel/time/time.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/kernel/time/time.c b/kernel/time/time.c
index 6fa99213fc72..b1225db61eb2 100644
--- a/kernel/time/time.c
+++ b/kernel/time/time.c
@@ -63,7 +63,7 @@ EXPORT_SYMBOL(sys_tz);
  */
 SYSCALL_DEFINE1(time, time_t __user *, tloc)
 {
-	time_t i = get_seconds();
+	time_t i = (time_t)ktime_get_real_seconds();
 
 	if (tloc) {
 		if (put_user(i,tloc))
@@ -106,11 +106,9 @@ SYSCALL_DEFINE1(stime, time_t __user *, tptr)
 /* compat_time_t is a 32 bit "long" and needs to get converted. */
 COMPAT_SYSCALL_DEFINE1(time, compat_time_t __user *, tloc)
 {
-	struct timeval tv;
 	compat_time_t i;
 
-	do_gettimeofday(&tv);
-	i = tv.tv_sec;
+	i = (compat_time_t)ktime_get_real_seconds();
 
 	if (tloc) {
 		if (put_user(i,tloc))