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author | Anton Blanchard <anton@samba.org> | 2007-10-15 16:13:56 -0500 |
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committer | Thomas Gleixner <tglx@linutronix.de> | 2007-10-18 22:54:18 +0200 |
commit | c70878b4e0b6cf8d2f1e46319e48e821ef4a8aba (patch) | |
tree | a05d3dc9f2dfe2a0f18819b4eb60ba7f9d7833f6 /kernel/compat.c | |
parent | 04c227140fed77587432667a574b14736a06dd7f (diff) | |
download | linux-stable-c70878b4e0b6cf8d2f1e46319e48e821ef4a8aba.tar.gz linux-stable-c70878b4e0b6cf8d2f1e46319e48e821ef4a8aba.tar.bz2 linux-stable-c70878b4e0b6cf8d2f1e46319e48e821ef4a8aba.zip |
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.c | 57 |
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 = ¤t_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, |