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authorAnton Blanchard <anton@samba.org>2007-10-15 16:13:56 -0500
committerThomas Gleixner <tglx@linutronix.de>2007-10-18 22:54:18 +0200
commitc70878b4e0b6cf8d2f1e46319e48e821ef4a8aba (patch)
treea05d3dc9f2dfe2a0f18819b4eb60ba7f9d7833f6 /kernel/compat.c
parent04c227140fed77587432667a574b14736a06dd7f (diff)
downloadlinux-sh-c70878b4e0b6cf8d2f1e46319e48e821ef4a8aba.tar.gz
hrtimer: hook compat_sys_nanosleep up to high res timer code
Now we have high res timers on ppc64 I thought Id test them. It turns out compat_sys_nanosleep hasnt been converted to the hrtimer code and so is limited to HZ resolution. The follow patch converts compat_sys_nanosleep to use high res timers. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/compat.c')
-rw-r--r--kernel/compat.c57
1 files changed, 11 insertions, 46 deletions
diff --git a/kernel/compat.c b/kernel/compat.c
index 3bae3742c2aa..252a446fb0d0 100644
--- a/kernel/compat.c
+++ b/kernel/compat.c
@@ -40,62 +40,27 @@ int put_compat_timespec(const struct timespec *ts, struct compat_timespec __user
__put_user(ts->tv_nsec, &cts->tv_nsec)) ? -EFAULT : 0;
}
-static long compat_nanosleep_restart(struct restart_block *restart)
-{
- unsigned long expire = restart->arg0, now = jiffies;
- struct compat_timespec __user *rmtp;
-
- /* Did it expire while we handled signals? */
- if (!time_after(expire, now))
- return 0;
-
- expire = schedule_timeout_interruptible(expire - now);
- if (expire == 0)
- return 0;
-
- rmtp = (struct compat_timespec __user *)restart->arg1;
- if (rmtp) {
- struct compat_timespec ct;
- struct timespec t;
-
- jiffies_to_timespec(expire, &t);
- ct.tv_sec = t.tv_sec;
- ct.tv_nsec = t.tv_nsec;
- if (copy_to_user(rmtp, &ct, sizeof(ct)))
- return -EFAULT;
- }
- /* The 'restart' block is already filled in */
- return -ERESTART_RESTARTBLOCK;
-}
-
asmlinkage long compat_sys_nanosleep(struct compat_timespec __user *rqtp,
- struct compat_timespec __user *rmtp)
+ struct compat_timespec __user *rmtp)
{
- struct timespec t;
- struct restart_block *restart;
- unsigned long expire;
+ struct timespec tu, rmt;
+ long ret;
- if (get_compat_timespec(&t, rqtp))
+ if (get_compat_timespec(&tu, rqtp))
return -EFAULT;
- if ((t.tv_nsec >= 1000000000L) || (t.tv_nsec < 0) || (t.tv_sec < 0))
+ if (!timespec_valid(&tu))
return -EINVAL;
- expire = timespec_to_jiffies(&t) + (t.tv_sec || t.tv_nsec);
- expire = schedule_timeout_interruptible(expire);
- if (expire == 0)
- return 0;
+ ret = hrtimer_nanosleep(&tu, rmtp ? &rmt : NULL, HRTIMER_MODE_REL,
+ CLOCK_MONOTONIC);
- if (rmtp) {
- jiffies_to_timespec(expire, &t);
- if (put_compat_timespec(&t, rmtp))
+ if (ret && rmtp) {
+ if (put_compat_timespec(&rmt, rmtp))
return -EFAULT;
}
- restart = &current_thread_info()->restart_block;
- restart->fn = compat_nanosleep_restart;
- restart->arg0 = jiffies + expire;
- restart->arg1 = (unsigned long) rmtp;
- return -ERESTART_RESTARTBLOCK;
+
+ return ret;
}
static inline long get_compat_itimerval(struct itimerval *o,