Merge branch 'perf/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic...

[safe/jmp/linux-2.6] / kernel / posix-timers.c

diff --git a/kernel/posix-timers.c b/kernel/posix-timers.c
index aa922bb..ad72342 100644 (file)
--- a/kernel/posix-timers.c
+++ b/kernel/posix-timers.c
@@ -197,6 +197,17 @@ static int common_timer_create(struct k_itimer *new_timer)
        return 0;
 }
 
+static int no_timer_create(struct k_itimer *new_timer)
+{
+       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.
  */
@@ -231,6 +242,25 @@ static int posix_get_monotonic_raw(clockid_t which_clock, struct timespec *tp)
        return 0;
 }
 
+
+static int posix_get_realtime_coarse(clockid_t which_clock, struct timespec *tp)
+{
+       *tp = current_kernel_time();
+       return 0;
+}
+
+static int posix_get_monotonic_coarse(clockid_t which_clock,
+                                               struct timespec *tp)
+{
+       *tp = get_monotonic_coarse();
+       return 0;
+}
+
+static int posix_get_coarse_res(const clockid_t which_clock, struct timespec *tp)
+{
+       *tp = ktime_to_timespec(KTIME_LOW_RES);
+       return 0;
+}
 /*
  * Initialize everything, well, just everything in Posix clocks/timers ;)
  */
@@ -248,11 +278,29 @@ static __init int init_posix_timers(void)
                .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);
        register_posix_clock(CLOCK_MONOTONIC, &clock_monotonic);
        register_posix_clock(CLOCK_MONOTONIC_RAW, &clock_monotonic_raw);
+       register_posix_clock(CLOCK_REALTIME_COARSE, &clock_realtime_coarse);
+       register_posix_clock(CLOCK_MONOTONIC_COARSE, &clock_monotonic_coarse);
 
        posix_timers_cache = kmem_cache_create("posix_timers_cache",
                                        sizeof (struct k_itimer), 0, SLAB_PANIC,
@@ -471,10 +519,9 @@ static void release_posix_timer(struct k_itimer *tmr, int it_id_set)
 
 /* Create a POSIX.1b interval timer. */
 
-asmlinkage long
-sys_timer_create(const clockid_t which_clock,
-                struct sigevent __user *timer_event_spec,
-                timer_t __user * created_timer_id)
+SYSCALL_DEFINE3(timer_create, const clockid_t, which_clock,
+               struct sigevent __user *, timer_event_spec,
+               timer_t __user *, created_timer_id)
 {
        struct k_itimer *new_timer;
        int error, new_timer_id;
@@ -512,14 +559,7 @@ sys_timer_create(const clockid_t which_clock,
        new_timer->it_id = (timer_t) new_timer_id;
        new_timer->it_clock = which_clock;
        new_timer->it_overrun = -1;
-       error = CLOCK_DISPATCH(which_clock, timer_create, (new_timer));
-       if (error)
-               goto out;
 
-       /*
-        * return the timer_id now.  The next step is hard to
-        * back out if there is an error.
-        */
        if (copy_to_user(created_timer_id,
                         &new_timer_id, sizeof (new_timer_id))) {
                error = -EFAULT;
@@ -550,6 +590,10 @@ sys_timer_create(const clockid_t which_clock,
        new_timer->sigq->info.si_tid   = new_timer->it_id;
        new_timer->sigq->info.si_code  = SI_TIMER;
 
+       error = CLOCK_DISPATCH(which_clock, timer_create, (new_timer));
+       if (error)
+               goto out;
+
        spin_lock_irq(&current->sighand->siglock);
        new_timer->it_signal = current->signal;
        list_add(&new_timer->list, &current->signal->posix_timers);
@@ -655,8 +699,8 @@ common_timer_get(struct k_itimer *timr, struct itimerspec *cur_setting)
 }
 
 /* Get the time remaining on a POSIX.1b interval timer. */
-asmlinkage long
-sys_timer_gettime(timer_t timer_id, struct itimerspec __user *setting)
+SYSCALL_DEFINE2(timer_gettime, timer_t, timer_id,
+               struct itimerspec __user *, setting)
 {
        struct k_itimer *timr;
        struct itimerspec cur_setting;
@@ -685,8 +729,7 @@ sys_timer_gettime(timer_t timer_id, struct itimerspec __user *setting)
  * the call back to do_schedule_next_timer().  So all we need to do is
  * to pick up the frozen overrun.
  */
-asmlinkage long
-sys_timer_getoverrun(timer_t timer_id)
+SYSCALL_DEFINE1(timer_getoverrun, timer_t, timer_id)
 {
        struct k_itimer *timr;
        int overrun;
@@ -754,10 +797,9 @@ common_timer_set(struct k_itimer *timr, int flags,
 }
 
 /* Set a POSIX.1b interval timer */
-asmlinkage long
-sys_timer_settime(timer_t timer_id, int flags,
-                 const struct itimerspec __user *new_setting,
-                 struct itimerspec __user *old_setting)
+SYSCALL_DEFINE4(timer_settime, timer_t, timer_id, int, flags,
+               const struct itimerspec __user *, new_setting,
+               struct itimerspec __user *, old_setting)
 {
        struct k_itimer *timr;
        struct itimerspec new_spec, old_spec;
@@ -810,8 +852,7 @@ static inline int timer_delete_hook(struct k_itimer *timer)
 }
 
 /* Delete a POSIX.1b interval timer. */
-asmlinkage long
-sys_timer_delete(timer_t timer_id)
+SYSCALL_DEFINE1(timer_delete, timer_t, timer_id)
 {
        struct k_itimer *timer;
        unsigned long flags;
@@ -897,8 +938,8 @@ int do_posix_clock_nonanosleep(const clockid_t clock, int flags,
 }
 EXPORT_SYMBOL_GPL(do_posix_clock_nonanosleep);
 
-asmlinkage long sys_clock_settime(const clockid_t which_clock,
-                                 const struct timespec __user *tp)
+SYSCALL_DEFINE2(clock_settime, const clockid_t, which_clock,
+               const struct timespec __user *, tp)
 {
        struct timespec new_tp;
 
@@ -910,8 +951,8 @@ asmlinkage long sys_clock_settime(const clockid_t which_clock,
        return CLOCK_DISPATCH(which_clock, clock_set, (which_clock, &new_tp));
 }
 
-asmlinkage long
-sys_clock_gettime(const clockid_t which_clock, struct timespec __user *tp)
+SYSCALL_DEFINE2(clock_gettime, const clockid_t, which_clock,
+               struct timespec __user *,tp)
 {
        struct timespec kernel_tp;
        int error;
@@ -927,8 +968,8 @@ sys_clock_gettime(const clockid_t which_clock, struct timespec __user *tp)
 
 }
 
-asmlinkage long
-sys_clock_getres(const clockid_t which_clock, struct timespec __user *tp)
+SYSCALL_DEFINE2(clock_getres, const clockid_t, which_clock,
+               struct timespec __user *, tp)
 {
        struct timespec rtn_tp;
        int error;
@@ -957,10 +998,9 @@ static int common_nsleep(const clockid_t which_clock, int flags,
                                 which_clock);
 }
 
-asmlinkage long
-sys_clock_nanosleep(const clockid_t which_clock, int flags,
-                   const struct timespec __user *rqtp,
-                   struct timespec __user *rmtp)
+SYSCALL_DEFINE4(clock_nanosleep, const clockid_t, which_clock, int, flags,
+               const struct timespec __user *, rqtp,
+               struct timespec __user *, rmtp)
 {
        struct timespec t;