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Subject[PATCH v5 10/24] posix-timers: Factor out the guts of 'clock_settime' for reusing
Date
In order to reuse the very same logic for the year 2038 safe syscalls
which we need to introduce for 32bit system, factor out the guts of
the 'clock_settime' syscall.

Signed-off-by: Baolin Wang <baolin.wang@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 778610c..65610ac 100644
--- a/kernel/time/posix-timers.c
+++ b/kernel/time/posix-timers.c
@@ -1089,19 +1089,25 @@ 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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