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authorAnton Blanchard <anton@samba.org>2007-10-15 16:06:04 -0500
committerThomas Gleixner <tglx@linutronix.de>2007-10-18 22:54:18 +0200
commit04c227140fed77587432667a574b14736a06dd7f (patch)
tree56cc470fae9f0d78d499c9ab2ab526acb35440e4 /kernel/posix-timers.c
parentd85714d81cc0408daddb68c10f7fd69eafe7c213 (diff)
hrtimer: Rework hrtimer_nanosleep to make sys_compat_nanosleep easier
Pull the copy_to_user out of hrtimer_nanosleep and into the callers (common_nsleep, sys_nanosleep) in preparation for converting compat_sys_nanosleep to use hrtimers. Signed-off-by: Anton Blanchard <anton@samba.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/posix-timers.c')
-rw-r--r--kernel/posix-timers.c17
1 files changed, 14 insertions, 3 deletions
diff --git a/kernel/posix-timers.c b/kernel/posix-timers.c
index d71ed09fe1d..d11f579d189 100644
--- a/kernel/posix-timers.c
+++ b/kernel/posix-timers.c
@@ -981,9 +981,20 @@ sys_clock_getres(const clockid_t which_clock, struct timespec __user *tp)
static int common_nsleep(const clockid_t which_clock, int flags,
struct timespec *tsave, struct timespec __user *rmtp)
{
- return hrtimer_nanosleep(tsave, rmtp, flags & TIMER_ABSTIME ?
- HRTIMER_MODE_ABS : HRTIMER_MODE_REL,
- which_clock);
+ struct timespec rmt;
+ int ret;
+
+ ret = hrtimer_nanosleep(tsave, rmtp ? &rmt : NULL,
+ flags & TIMER_ABSTIME ?
+ HRTIMER_MODE_ABS : HRTIMER_MODE_REL,
+ which_clock);
+
+ if (ret && rmtp) {
+ if (copy_to_user(rmtp, &rmt, sizeof(*rmtp)))
+ return -EFAULT;
+ }
+
+ return ret;
}
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