[PATCH v3 08/22] posix-timers:Split out the guts of the syscall and change the implementation for clock_settime

From: Baolin Wang
Date: Mon May 11 2015 - 07:16:24 EST

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.wang@xxxxxxxxxx>
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 f2fde32..dcc35fc 100644
--- a/kernel/time/posix-timers.c
+++ b/kernel/time/posix-timers.c
@@ -1072,19 +1072,25 @@ 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,

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/