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@arndb.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: John Stultz <john.stultz@linaro.org>
Cc: y2038@lists.linaro.org
Cc: Stephen Boyd <sboyd@kernel.org>
Cc: Deepa Dinamani <deepa.kernel@gmail.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Link: https://lkml.kernel.org/r/20180618140811.2998503-2-arnd@arndb.de

diff --git a/kernel/time/time.c b/kernel/time/time.c
index 6fa99213fc720e4b77c467ae69a87007c22b37d2..b1225db61eb2c3bd6955fc0cf0695a20bec9c4e2 100644 (file)
--- 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))