[PATCH 11/11] k_clock:Remove the 32bit methods with timespec type

Baolin Wang
2015-04-20T05:57:39Z

All of the k_clock users have been converted to the new methods. This patch
removes the older methods with timepsec/itimerspec type. As a result, the k_clock
structure is ready for the year 2038.

Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
---
include/linux/posix-timers.h | 9 ------
kernel/time/posix-timers.c | 72 +++++++++++++++++-------------------------
2 files changed, 29 insertions(+), 52 deletions(-)

diff --git a/include/linux/posix-timers.h b/include/linux/posix-timers.h
index 35786c5..7c3dae2 100644
--- a/include/linux/posix-timers.h
+++ b/include/linux/posix-timers.h
@@ -97,29 +97,20 @@ struct k_itimer {
};

struct k_clock {
- int (*clock_getres) (const clockid_t which_clock, struct timespec *tp);
int (*clock_getres64) (const clockid_t which_clock, struct timespec64 *tp);
- int (*clock_set) (const clockid_t which_clock,
- const struct timespec *tp);
int (*clock_set64) (const clockid_t which_clock,
const struct timespec64 *tp);
- int (*clock_get) (const clockid_t which_clock, struct timespec * tp);
int (*clock_get64) (const clockid_t which_clock, struct timespec64 *tp);
int (*clock_adj) (const clockid_t which_clock, struct timex *tx);
int (*timer_create) (struct k_itimer *timer);
int (*nsleep) (const clockid_t which_clock, int flags,
struct timespec *, struct timespec __user *);
long (*nsleep_restart) (struct restart_block *restart_block);
- int (*timer_set) (struct k_itimer * timr, int flags,
- struct itimerspec * new_setting,
- struct itimerspec * old_setting);
int (*timer_set64) (struct k_itimer *timr, int flags,
struct itimerspec64 *new_setting,
struct itimerspec64 *old_setting);
int (*timer_del) (struct k_itimer * timr);
#define TIMER_RETRY 1
- void (*timer_get) (struct k_itimer * timr,
- struct itimerspec * cur_setting);
void (*timer_get64) (struct k_itimer *timr,
struct itimerspec64 *cur_setting);
};
diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c
index 47d1abf..3196ec0 100644
--- a/kernel/time/posix-timers.c
+++ b/kernel/time/posix-timers.c
@@ -528,13 +528,13 @@ void posix_timers_register_clock(const clockid_t clock_id,
return;
}

- if (!new_clock->clock_get && !new_clock->clock_get64) {
- printk(KERN_WARNING "POSIX clock id %d lacks clock_get() and clock_get64()\n",
+ if (!new_clock->clock_get64) {
+ printk(KERN_WARNING "POSIX clock id %d lacks clock_get64()\n",
clock_id);
return;
}
- if (!new_clock->clock_getres && !new_clock->clock_getres64) {
- printk(KERN_WARNING "POSIX clock id %d lacks clock_getres() and clock_getres64()\n",
+ if (!!new_clock->clock_getres64) {
+ printk(KERN_WARNING "POSIX clock id %d lacks clock_getres64()\n",
clock_id);
return;
}
@@ -585,7 +585,7 @@ static struct k_clock *clockid_to_kclock(const clockid_t id)
return (id & CLOCKFD_MASK) == CLOCKFD ?
&clock_posix_dynamic : &clock_posix_cpu;

- if (id >= MAX_CLOCKS || (!posix_clocks[id].clock_getres && !posix_clocks[id].clock_getres64))
+ if (id >= MAX_CLOCKS || !posix_clocks[id].clock_getres64)
return NULL;
return &posix_clocks[id];
}
@@ -788,15 +788,11 @@ SYSCALL_DEFINE2(timer_gettime, timer_t, timer_id,
return -EINVAL;

kc = clockid_to_kclock(timr->it_clock);
- if (WARN_ON_ONCE(!kc || (!kc->timer_get && !kc->timer_get64))) {
+ if (WARN_ON_ONCE(!kc || !kc->timer_get64)) {
ret = -EINVAL;
} else {
- if (kc->timer_get64) {
- kc->timer_get64(timr, &cur_setting64);
- cur_setting = itimerspec64_to_itimerspec(cur_setting64);
- } else {
- kc->timer_get(timr, &cur_setting);
- }
+ kc->timer_get64(timr, &cur_setting64);
+ cur_setting = itimerspec64_to_itimerspec(cur_setting64);
}

unlock_timer(timr, flags);
@@ -911,18 +907,14 @@ retry:
return -EINVAL;

kc = clockid_to_kclock(timr->it_clock);
- if (WARN_ON_ONCE(!kc || (!kc->timer_set && !kc->timer_set64))) {
+ if (WARN_ON_ONCE(!kc || !kc->timer_set64)) {
error = -EINVAL;
} else {
- if (kc->timer_set64) {
- new_spec64 = itimerspec_to_itimerspec64(new_spec);
- error = kc->timer_set64(timr, flags, &new_spec64,
- &old_spec64);
- if (old_setting)
- old_spec = itimerspec64_to_itimerspec(old_spec64);
- } else {
- error = kc->timer_set(timr, flags, &new_spec, rtn);
- }
+ new_spec64 = itimerspec_to_itimerspec64(new_spec);
+ error = kc->timer_set64(timr, flags, &new_spec64,
+ &old_spec64);
+ if (old_setting)
+ old_spec = itimerspec64_to_itimerspec(old_spec64);
}

unlock_timer(timr, flag);
@@ -1032,18 +1024,14 @@ SYSCALL_DEFINE2(clock_settime, const clockid_t, which_clock,
struct timespec new_tp;
struct timespec64 new_tp64;

- if (!kc || (!kc->clock_set && !kc->clock_set64))
+ if (!kc || !kc->clock_set64)
return -EINVAL;

if (copy_from_user(&new_tp, tp, sizeof (*tp)))
return -EFAULT;

- if (kc->clock_set64) {
- new_tp64 = timespec_to_timespec64(new_tp);
- return kc->clock_set64(which_clock, &new_tp64);
- } else {
- return kc->clock_set(which_clock, &new_tp);
- }
+ new_tp64 = timespec_to_timespec64(new_tp);
+ return kc->clock_set64(which_clock, &new_tp64);
}

SYSCALL_DEFINE2(clock_gettime, const clockid_t, which_clock,
@@ -1057,14 +1045,13 @@ SYSCALL_DEFINE2(clock_gettime, const clockid_t, which_clock,
if (!kc)
return -EINVAL;

- if (kc->clock_get64) {
- error = kc->clock_get64(which_clock, &kernel_tp64);
- kernel_tp = timespec64_to_timespec(kernel_tp64);
- } else {
- error = kc->clock_get(which_clock, &kernel_tp);
- }
+ error = kc->clock_get64(which_clock, &kernel_tp64);
+ if (!error)
+ return error;
+
+ kernel_tp = timespec64_to_timespec(kernel_tp64);

- if (!error && copy_to_user(tp, &kernel_tp, sizeof (kernel_tp)))
+ if (copy_to_user(tp, &kernel_tp, sizeof (kernel_tp)))
error = -EFAULT;

return error;
@@ -1104,14 +1091,13 @@ SYSCALL_DEFINE2(clock_getres, const clockid_t, which_clock,
if (!kc)
return -EINVAL;

- if (kc->clock_getres64) {
- error = kc->clock_getres64(which_clock, &rtn_tp64);
- rtn_tp = timespec64_to_timespec(rtn_tp64);
- } else {
- error = kc->clock_getres(which_clock, &rtn_tp);
- }
+ error = kc->clock_getres64(which_clock, &rtn_tp64);
+ if (!error)
+ return error;
+
+ rtn_tp = timespec64_to_timespec(rtn_tp64);

- if (!error && tp && copy_to_user(tp, &rtn_tp, sizeof (rtn_tp)))
+ if (tp && copy_to_user(tp, &rtn_tp, sizeof (rtn_tp)))
error = -EFAULT;

return error;
--
1.7.9.5