lkml.org 
[lkml]   [2015]   [May]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v3 04/22] posix-timers:Split out the guts of the syscall and change the implementation for timer_gettime
Date
This patch splits out the guts of the timer_gettime syscall and changes the
timer_gettime syscall implementation to prepare the converting to 64bit methods
for the timer_gettime syscall function in posix-timers.c file.

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 31ea01f..9df664a 100644
--- a/kernel/time/posix-timers.c
+++ b/kernel/time/posix-timers.c
@@ -766,11 +766,8 @@ common_timer_get(struct k_itimer *timr, struct itimerspec *cur_setting)
cur_setting->it_value = ktime_to_timespec(remaining);
}

-/* Get the time remaining on a POSIX.1b interval timer. */
-SYSCALL_DEFINE2(timer_gettime, timer_t, timer_id,
- struct itimerspec __user *, setting)
+static int __timer_gettime(timer_t timer_id, struct itimerspec *cur_setting)
{
- struct itimerspec cur_setting;
struct k_itimer *timr;
struct k_clock *kc;
unsigned long flags;
@@ -784,9 +781,18 @@ SYSCALL_DEFINE2(timer_gettime, timer_t, timer_id,
if (WARN_ON_ONCE(!kc || !kc->timer_get))
ret = -EINVAL;
else
- kc->timer_get(timr, &cur_setting);
+ kc->timer_get(timr, cur_setting);

unlock_timer(timr, flags);
+ return ret;
+}
+
+/* Get the time remaining on a POSIX.1b interval timer. */
+SYSCALL_DEFINE2(timer_gettime, timer_t, timer_id,
+ struct itimerspec __user *, setting)
+{
+ struct itimerspec cur_setting;
+ int ret = __timer_gettime(timer_id, &cur_setting);

if (!ret && copy_to_user(setting, &cur_setting, sizeof (cur_setting)))
return -EFAULT;
--
1.7.9.5


\
 
 \ /
  Last update: 2015-05-11 13:21    [W:0.024 / U:2.260 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site