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From: Baolin Wang <baolin.wang@linaro.org>
To: tglx@linutronix.de
Cc: arnd@arndb.de, linux-kernel@vger.kernel.org, baolin.wang@linaro.org,
        y2038@lists.linaro.org
Subject: [PATCH v5 12/24] posix-timers: Factor out the guts of 'clock_gettime' for reusing
Date: Fri, 12 Jun 2015 15:48:27 +0800
Message-Id: <46722fb0d735b973caa3a4d52ce25b2448e144d2.1434079263.git.baolin.wang@linaro.org>
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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_gettime' syscall.

Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
---
 kernel/time/posix-timers.c |   16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c
index dcc632c..ca63626 100644
--- a/kernel/time/posix-timers.c
+++ b/kernel/time/posix-timers.c
@@ -1124,17 +1124,23 @@ SYSCALL_DEFINE2(clock_settime, const clockid_t, which_clock,
 	return __clock_settime(which_clock, &new_tp);
 }
 
-SYSCALL_DEFINE2(clock_gettime, const clockid_t, which_clock,
-		struct timespec __user *,tp)
+static int __clock_gettime(clockid_t which_clock, struct timespec *ts)
 {
 	struct k_clock *kc = clockid_to_kclock(which_clock);
-	struct timespec kernel_tp;
-	int error;
 
 	if (!kc)
 		return -EINVAL;
 
-	error = kc->clock_get(which_clock, &kernel_tp);
+	return kc->clock_get(which_clock, ts);
+}
+
+SYSCALL_DEFINE2(clock_gettime, const clockid_t, which_clock,
+		struct timespec __user *,tp)
+{
+	struct timespec kernel_tp;
+	int error;
+
+	error = __clock_gettime(which_clock, &kernel_tp);
 
 	if (!error && copy_to_user(tp, &kernel_tp, sizeof (kernel_tp)))
 		error = -EFAULT;
-- 
1.7.9.5

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