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Subject[patch 06/28] posix-timers: Convert clock_nanosleep to clockid_to_kclock()
Use the new kclock decoding function in clock_nanosleep and cleanup all
kclocks which use the default functions.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Richard Cochran <richard.cochran@omicron.at>
---
drivers/char/mmtimer.c | 1 -
include/linux/posix-timers.h | 2 --
kernel/posix-timers.c | 26 +++++++-------------------
3 files changed, 7 insertions(+), 22 deletions(-)
Index: linux-2.6-tip/drivers/char/mmtimer.c
===================================================================
--- linux-2.6-tip.orig/drivers/char/mmtimer.c
+++ linux-2.6-tip/drivers/char/mmtimer.c
@@ -768,7 +768,6 @@ static struct k_clock sgi_clock = {
.clock_set = sgi_clock_set,
.clock_get = sgi_clock_get,
.timer_create = sgi_timer_create,
- .nsleep = do_posix_clock_nonanosleep,
.timer_set = sgi_timer_set,
.timer_del = sgi_timer_del,
.timer_get = sgi_timer_get
Index: linux-2.6-tip/include/linux/posix-timers.h
===================================================================
--- linux-2.6-tip.orig/include/linux/posix-timers.h
+++ linux-2.6-tip/include/linux/posix-timers.h
@@ -90,8 +90,6 @@ extern struct k_clock clock_posix_cpu;
void register_posix_clock(const clockid_t clock_id, struct k_clock *new_clock);

/* error handlers for timer_create, nanosleep and settime */
-int do_posix_clock_nonanosleep(const clockid_t, int flags, struct timespec *,
- struct timespec __user *);
int do_posix_clock_nosettime(const clockid_t, const struct timespec *tp);

/* function to call to trigger timer event */
Index: linux-2.6-tip/kernel/posix-timers.c
===================================================================
--- linux-2.6-tip.orig/kernel/posix-timers.c
+++ linux-2.6-tip/kernel/posix-timers.c
@@ -216,12 +216,6 @@ static int no_timer_create(struct k_itim
return -EOPNOTSUPP;
}

-static int no_nsleep(const clockid_t which_clock, int flags,
- struct timespec *tsave, struct timespec __user *rmtp)
-{
- return -EOPNOTSUPP;
-}
-
/*
* Return nonzero if we know a priori this clockid_t value is bogus.
*/
@@ -282,32 +276,31 @@ static __init int init_posix_timers(void
{
struct k_clock clock_realtime = {
.clock_getres = hrtimer_get_res,
+ .nsleep = common_nsleep,
};
struct k_clock clock_monotonic = {
.clock_getres = hrtimer_get_res,
.clock_get = posix_ktime_get_ts,
.clock_set = do_posix_clock_nosettime,
+ .nsleep = common_nsleep,
};
struct k_clock clock_monotonic_raw = {
.clock_getres = hrtimer_get_res,
.clock_get = posix_get_monotonic_raw,
.clock_set = do_posix_clock_nosettime,
.timer_create = no_timer_create,
- .nsleep = no_nsleep,
};
struct k_clock clock_realtime_coarse = {
.clock_getres = posix_get_coarse_res,
.clock_get = posix_get_realtime_coarse,
.clock_set = do_posix_clock_nosettime,
.timer_create = no_timer_create,
- .nsleep = no_nsleep,
};
struct k_clock clock_monotonic_coarse = {
.clock_getres = posix_get_coarse_res,
.clock_get = posix_get_monotonic_coarse,
.clock_set = do_posix_clock_nosettime,
.timer_create = no_timer_create,
- .nsleep = no_nsleep,
};

register_posix_clock(CLOCK_REALTIME, &clock_realtime);
@@ -952,13 +945,6 @@ int do_posix_clock_nosettime(const clock
}
EXPORT_SYMBOL_GPL(do_posix_clock_nosettime);

-int do_posix_clock_nonanosleep(const clockid_t clock, int flags,
- struct timespec *t, struct timespec __user *r)
-{
- return -ENANOSLEEP_NOTSUP;
-}
-EXPORT_SYMBOL_GPL(do_posix_clock_nonanosleep);
-
SYSCALL_DEFINE2(clock_settime, const clockid_t, which_clock,
const struct timespec __user *, tp)
{
@@ -1023,10 +1009,13 @@ SYSCALL_DEFINE4(clock_nanosleep, const c
const struct timespec __user *, rqtp,
struct timespec __user *, rmtp)
{
+ struct k_clock *kc = clockid_to_kclock(which_clock);
struct timespec t;

- if (invalid_clockid(which_clock))
+ if (!kc)
return -EINVAL;
+ if (!kc->nsleep)
+ return -ENANOSLEEP_NOTSUP;

if (copy_from_user(&t, rqtp, sizeof (struct timespec)))
return -EFAULT;
@@ -1034,8 +1023,7 @@ SYSCALL_DEFINE4(clock_nanosleep, const c
if (!timespec_valid(&t))
return -EINVAL;

- return CLOCK_DISPATCH(which_clock, nsleep,
- (which_clock, flags, &t, rmtp));
+ return kc->nsleep(which_clock, flags, &t, rmtp);
}

/*



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