This patch splits out the guts of the clock_settime syscall and
changes the clock_settime syscall implementation to prepare the
converting to 64bit methods for the clock_settime syscall function
in posix-timers.c file.

Signed-off-by: Baolin Wang <baolin.w...@linaro.org>
---
 kernel/time/posix-timers.c |   14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c
index c034a53..9912745 100644
--- a/kernel/time/posix-timers.c
+++ b/kernel/time/posix-timers.c
@@ -1082,19 +1082,25 @@ void exit_itimers(struct signal_struct *sig)
        }
 }
 
-SYSCALL_DEFINE2(clock_settime, const clockid_t, which_clock,
-               const struct timespec __user *, tp)
+static int __clock_settime(clockid_t which_clock, struct timespec *ts)
 {
        struct k_clock *kc = clockid_to_kclock(which_clock);
-       struct timespec new_tp;
 
        if (!kc || !kc->clock_set)
                return -EINVAL;
 
+       return kc->clock_set(which_clock, ts);
+}
+
+SYSCALL_DEFINE2(clock_settime, const clockid_t, which_clock,
+               const struct timespec __user *, tp)
+{
+       struct timespec new_tp;
+
        if (copy_from_user(&new_tp, tp, sizeof (*tp)))
                return -EFAULT;
 
-       return kc->clock_set(which_clock, &new_tp);
+       return __clock_settime(which_clock, &new_tp);
 }
 
 SYSCALL_DEFINE2(clock_gettime, const clockid_t, which_clock,
-- 
1.7.9.5

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