Y2038

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[PATCH v3 14/23] posix-timers:Convert to the 64bit methods for the clock_getres syscall function

by Baolin Wang

This patch introduces the clock_getres64 method with timespec64 type for k_clock structure, that makes it ready for the 2038 year. Convert to the 64bit method with timespec64 type for the clock_getres syscall function, and change the clock_getres syscall implementation according to the CONFIG_64BIT macro. Also add a default 64bit method for the clock_getres64 pointer of k_clock structure, and it will be removed after all the drivers are converted to 64bit methods. Signed-off-by: Baolin Wang <baolin.wang(a)linaro.org> --- include/linux/posix-timers.h | 1 + kernel/time/posix-timers.c | 38 ++++++++++++++++++++++++++++++++------ 2 files changed, 33 insertions(+), 6 deletions(-) diff --git a/include/linux/posix-timers.h b/include/linux/posix-timers.h index be2123d..35786c5 100644 --- a/include/linux/posix-timers.h +++ b/include/linux/posix-timers.h @@ -98,6 +98,7 @@ 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, diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index a9e14cf..e0a6a09 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -567,6 +567,20 @@ static int default_clock_get64(const clockid_t which_clock, return ret; } +static int default_clock_getres64(const clockid_t which_clock, + struct timespec64 *tp64) +{ + struct k_clock *kc = clockid_to_kclock(which_clock); + struct timespec tp; + int ret; + + ret = kc->clock_getres(which_clock, &tp); + if (!ret) + *tp64 = timespec_to_timespec64(tp); + + return 0; +} + void posix_timers_register_clock(const clockid_t clock_id, struct k_clock *new_clock) { @@ -581,8 +595,8 @@ void posix_timers_register_clock(const clockid_t clock_id, clock_id); return; } - if (!new_clock->clock_getres) { - printk(KERN_WARNING "POSIX clock id %d lacks clock_getres()\n", + if (!new_clock->clock_getres && !new_clock->clock_getres64) { + printk(KERN_WARNING "POSIX clock id %d lacks clock_getres() and clock_getres64()\n", clock_id); return; } @@ -595,6 +609,8 @@ void posix_timers_register_clock(const clockid_t clock_id, new_clock->clock_set64 = default_clock_set64; if (new_clock->clock_get && !new_clock->clock_get64) new_clock->clock_get64 = default_clock_get64; + if (new_clock->clock_getres && !new_clock->clock_getres64) + new_clock->clock_getres64 = default_clock_getres64; posix_clocks[clock_id] = *new_clock; } @@ -642,7 +658,8 @@ 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) + if (id >= MAX_CLOCKS || (!posix_clocks[id].clock_getres + && !posix_clocks[id].clock_getres64)) return NULL; return &posix_clocks[id]; } @@ -1195,23 +1212,32 @@ SYSCALL_DEFINE2(clock_adjtime, const clockid_t, which_clock, return err; } -static int __clock_getres(clockid_t which_clock, struct timespec *ts) +static int __clock_getres(clockid_t which_clock, struct timespec64 *ts) { struct k_clock *kc = clockid_to_kclock(which_clock); if (!kc) return -EINVAL; - return kc->clock_getres(which_clock, ts); + return kc->clock_getres64(which_clock, ts); } SYSCALL_DEFINE2(clock_getres, const clockid_t, which_clock, struct timespec __user *, tp) { - struct timespec rtn_tp; int error; +#ifdef CONFIG_64BIT + struct timespec64 rtn_tp; error = __clock_getres(which_clock, &rtn_tp); +#else + struct timespec64 rtn_tp64; + struct timespec rtn_tp; + + error = __clock_getres(which_clock, &rtn_tp64); + if (!error) + rtn_tp = timespec64_to_timespec(rtn_tp64); +#endif if (!error && tp && copy_to_user(tp, &rtn_tp, sizeof (rtn_tp))) error = -EFAULT; -- 1.7.9.5

9 years, 7 months

[PATCH v3 12/23] posix-timers:Convert to the 64bit methods for the clock_gettime syscall function

by Baolin Wang

This patch introduces the clock_get64 method with timespec64 type for k_clock structure, that makes it ready for the 2038 year. Convert to the 64bit method with timespec64 type for the clock_gettime syscall function, and change the clock_gettime syscall implementation according to the CONFIG_64BIT macro. Also add a default 64bit method for the clock_get64 pointer of k_clock structure, and it will be removed after all the drivers are converted to 64bit methods. Signed-off-by: Baolin Wang <baolin.wang(a)linaro.org> --- include/linux/posix-timers.h | 1 + kernel/time/posix-timers.c | 35 ++++++++++++++++++++++++++++++----- 2 files changed, 31 insertions(+), 5 deletions(-) diff --git a/include/linux/posix-timers.h b/include/linux/posix-timers.h index 2b19ec8..be2123d 100644 --- a/include/linux/posix-timers.h +++ b/include/linux/posix-timers.h @@ -103,6 +103,7 @@ struct k_clock { 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, diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index ca85793..ddd681c 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -553,6 +553,20 @@ static int default_clock_set64(const clockid_t which_clock, return ret; } +static int default_clock_get64(const clockid_t which_clock, + struct timespec64 *tp64) +{ + struct k_clock *kc = clockid_to_kclock(which_clock); + struct timespec tp; + int ret; + + ret = kc->clock_get(which_clock, &tp); + if (!ret) + *tp64 = timespec_to_timespec64(tp); + + return ret; +} + void posix_timers_register_clock(const clockid_t clock_id, struct k_clock *new_clock) { @@ -562,8 +576,8 @@ void posix_timers_register_clock(const clockid_t clock_id, return; } - if (!new_clock->clock_get) { - printk(KERN_WARNING "POSIX clock id %d lacks clock_get()\n", + if (!new_clock->clock_get && !new_clock->clock_get64) { + printk(KERN_WARNING "POSIX clock id %d lacks clock_get() and clock_get64()\n", clock_id); return; } @@ -579,6 +593,8 @@ void posix_timers_register_clock(const clockid_t clock_id, new_clock->timer_set64 = default_timer_set64; if (new_clock->clock_set && !new_clock->clock_set64) new_clock->clock_set64 = default_clock_set64; + if (new_clock->clock_get && !new_clock->clock_get64) + new_clock->clock_get64 = default_clock_get64; posix_clocks[clock_id] = *new_clock; } @@ -1123,23 +1139,32 @@ SYSCALL_DEFINE2(clock_settime, const clockid_t, which_clock, #endif } -static int __clock_gettime(clockid_t which_clock, struct timespec *ts) +static int __clock_gettime(clockid_t which_clock, struct timespec64 *ts) { struct k_clock *kc = clockid_to_kclock(which_clock); if (!kc) return -EINVAL; - return kc->clock_get(which_clock, ts); + return kc->clock_get64(which_clock, ts); } SYSCALL_DEFINE2(clock_gettime, const clockid_t, which_clock, struct timespec __user *,tp) { - struct timespec kernel_tp; int error; +#ifdef CONFIG_64BIT + struct timespec64 kernel_tp; error = __clock_gettime(which_clock, &kernel_tp); +#else + struct timespec64 kernel_tp64; + struct timespec kernel_tp; + + error = __clock_gettime(which_clock, &kernel_tp64); + if (!error) + kernel_tp = timespec64_to_timespec(kernel_tp64); +#endif if (!error && copy_to_user(tp, &kernel_tp, sizeof (kernel_tp))) error = -EFAULT; -- 1.7.9.5

9 years, 7 months

[PATCH v3 10/23] posix-timers:Convert to the 64bit methods for the clock_settime syscall function

by Baolin Wang

This patch introduces the clock_set64 method with timespec64 type for k_clock structure, that makes it ready for the 2038 year. Convert to the 64bit method with timespec64 type for the clock_settime syscall function, and change the clock_settime syscall implementation according to the CONFIG_64BIT macro. Also add a default 64bit method for the clock_set64 pointer of k_clock structure, and it will be removed after all the drivers are converted to 64bit methods. Signed-off-by: Baolin Wang <baolin.wang(a)linaro.org> --- include/linux/posix-timers.h | 2 ++ kernel/time/posix-timers.c | 30 +++++++++++++++++++++++++++--- 2 files changed, 29 insertions(+), 3 deletions(-) diff --git a/include/linux/posix-timers.h b/include/linux/posix-timers.h index 16c3364..2b19ec8 100644 --- a/include/linux/posix-timers.h +++ b/include/linux/posix-timers.h @@ -100,6 +100,8 @@ struct k_clock { int (*clock_getres) (const clockid_t which_clock, struct timespec *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_adj) (const clockid_t which_clock, struct timex *tx); int (*timer_create) (struct k_itimer *timer); diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index a986a61..b8fae69 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -541,6 +541,18 @@ static int default_timer_set64(struct k_itimer *timr, int flags, return ret; } +static int default_clock_set64(const clockid_t which_clock, + const struct timespec64 *tp64) +{ + struct k_clock *kc = clockid_to_kclock(which_clock); + struct timespec tp; + int ret; + + tp = timespec64_to_timespec(*tp64); + ret = kc->clock_set(which_clock, &tp); + return ret; +} + void posix_timers_register_clock(const clockid_t clock_id, struct k_clock *new_clock) { @@ -565,6 +577,8 @@ void posix_timers_register_clock(const clockid_t clock_id, new_clock->timer_get64 = default_timer_get64; if (new_clock->timer_set && !new_clock->timer_set64) new_clock->timer_set64 = default_timer_set64; + if (new_clock->clock_set && !new_clock->clock_set64) + new_clock->clock_set64 = default_clock_set64; posix_clocks[clock_id] = *new_clock; } @@ -1078,25 +1092,35 @@ void exit_itimers(struct signal_struct *sig) } } -static int __clock_settime(clockid_t which_clock, struct timespec *ts) +static int __clock_settime(clockid_t which_clock, struct timespec64 *ts) { struct k_clock *kc = clockid_to_kclock(which_clock); - if (!kc || !kc->clock_set) + if (!kc || !kc->clock_set64) return -EINVAL; - return kc->clock_set(which_clock, ts); + return kc->clock_set64(which_clock, ts); } SYSCALL_DEFINE2(clock_settime, const clockid_t, which_clock, const struct timespec __user *, tp) { +#ifdef CONFIG_64BIT + struct timespec64 new_tp; +#else struct timespec new_tp; + struct timespec64 new_tp64; +#endif if (copy_from_user(&new_tp, tp, sizeof (*tp))) return -EFAULT; +#ifdef CONFIG_64BIT return __clock_settime(which_clock, &new_tp); +#else + new_tp64 = timespec_to_timespec64(new_tp); + return __clock_settime(which_clock, &new_tp64); +#endif } SYSCALL_DEFINE2(clock_gettime, const clockid_t, which_clock, -- 1.7.9.5

9 years, 7 months

[PATCH v3 05/23] posix-timers:Convert to the 64bit methods for the timer_gettime syscall function

by Baolin Wang

This patch introduces the timer_get64 method with itimerspec64 type for k_clock structure, that makes it ready for the 2038 year. Convert to the 64bit method with itimerspec64 type for the timer_gettime syscall function, and change the timer_gettime syscall implementation according to the CONFIG_64BIT macro. Also add a default 64bit method for the timer_get64 pointer of k_clock structure, and it will be removed after all the drivers are converted to 64bit methods. Signed-off-by: Baolin Wang <baolin.wang(a)linaro.org> --- include/linux/posix-timers.h | 2 ++ kernel/time/posix-timers.c | 31 +++++++++++++++++++++++++++---- 2 files changed, 29 insertions(+), 4 deletions(-) diff --git a/include/linux/posix-timers.h b/include/linux/posix-timers.h index 907f3fd..e84436b 100644 --- a/include/linux/posix-timers.h +++ b/include/linux/posix-timers.h @@ -113,6 +113,8 @@ struct k_clock { #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); }; extern struct k_clock clock_posix_cpu; diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index 9df664a..91036b1 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -140,6 +140,7 @@ static int common_timer_del(struct k_itimer *timer); static enum hrtimer_restart posix_timer_fn(struct hrtimer *data); static struct k_itimer *__lock_timer(timer_t timer_id, unsigned long *flags); +static struct k_clock *clockid_to_kclock(const clockid_t id); #define lock_timer(tid, flags) \ ({ struct k_itimer *__timr; \ @@ -513,6 +514,16 @@ static struct pid *good_sigevent(sigevent_t * event) return task_pid(rtn); } +static void default_timer_get64(struct k_itimer *timr, + struct itimerspec64 *cur_setting64) +{ + struct itimerspec cur_setting; + struct k_clock *kc = clockid_to_kclock(timr->it_clock); + + kc->timer_get(timr, &cur_setting); + *cur_setting64 = itimerspec_to_itimerspec64(&cur_setting); +} + void posix_timers_register_clock(const clockid_t clock_id, struct k_clock *new_clock) { @@ -533,6 +544,9 @@ void posix_timers_register_clock(const clockid_t clock_id, return; } + if (new_clock->timer_get && !new_clock->timer_get64) + new_clock->timer_get64 = default_timer_get64; + posix_clocks[clock_id] = *new_clock; } EXPORT_SYMBOL_GPL(posix_timers_register_clock); @@ -766,7 +780,7 @@ common_timer_get(struct k_itimer *timr, struct itimerspec *cur_setting) cur_setting->it_value = ktime_to_timespec(remaining); } -static int __timer_gettime(timer_t timer_id, struct itimerspec *cur_setting) +static int __timer_gettime(timer_t timer_id, struct itimerspec64 *cur_setting) { struct k_itimer *timr; struct k_clock *kc; @@ -778,10 +792,10 @@ static int __timer_gettime(timer_t timer_id, struct itimerspec *cur_setting) return -EINVAL; kc = clockid_to_kclock(timr->it_clock); - if (WARN_ON_ONCE(!kc || !kc->timer_get)) + if (WARN_ON_ONCE(!kc || !kc->timer_get64)) ret = -EINVAL; else - kc->timer_get(timr, cur_setting); + kc->timer_get64(timr, cur_setting); unlock_timer(timr, flags); return ret; @@ -791,8 +805,17 @@ static int __timer_gettime(timer_t timer_id, struct itimerspec *cur_setting) SYSCALL_DEFINE2(timer_gettime, timer_t, timer_id, struct itimerspec __user *, setting) { - struct itimerspec cur_setting; +#ifdef CONFIG_64BIT + struct itimerspec64 cur_setting; int ret = __timer_gettime(timer_id, &cur_setting); +#else + struct itimerspec64 cur_setting64; + struct itimerspec cur_setting; + + int ret = __timer_gettime(timer_id, &cur_setting64); + if (!ret) + cur_setting = itimerspec64_to_itimerspec(&cur_setting64); +#endif if (!ret && copy_to_user(setting, &cur_setting, sizeof (cur_setting))) return -EFAULT; -- 1.7.9.5

9 years, 7 months

[PATCH v3 15/22] time/posix-timers:Convert to the 64bit methods for k_clock callback functions

by Baolin Wang

This patch converts the timepsec type to timespec64 type, and converts the itimerspec type to itimerspec64 type for the k_clock callback functions. This patch also converts the timespec type to timespec64 type for timekeeping_clocktai() function which is used only in the posix-timers.c file. Signed-off-by: Baolin Wang <baolin.wang(a)linaro.org> --- include/linux/timekeeping.h | 4 +- kernel/time/posix-timers.c | 96 +++++++++++++++++++++---------------------- kernel/time/timekeeping.h | 2 +- 3 files changed, 51 insertions(+), 51 deletions(-) diff --git a/include/linux/timekeeping.h b/include/linux/timekeeping.h index 89beb62..c3345d5 100644 --- a/include/linux/timekeeping.h +++ b/include/linux/timekeeping.h @@ -250,9 +250,9 @@ static inline void get_monotonic_boottime64(struct timespec64 *ts) *ts = ktime_to_timespec64(ktime_get_boottime()); } -static inline void timekeeping_clocktai(struct timespec *ts) +static inline void timekeeping_clocktai(struct timespec64 *ts) { - *ts = ktime_to_timespec(ktime_get_clocktai()); + *ts = ktime_to_timespec64(ktime_get_clocktai()); } /* diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index b93b637..a5bf0cf 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -132,9 +132,9 @@ static struct k_clock posix_clocks[MAX_CLOCKS]; static int common_nsleep(const clockid_t, int flags, struct timespec *t, struct timespec __user *rmtp); static int common_timer_create(struct k_itimer *new_timer); -static void common_timer_get(struct k_itimer *, struct itimerspec *); +static void common_timer_get(struct k_itimer *, struct itimerspec64 *); static int common_timer_set(struct k_itimer *, int, - struct itimerspec *, struct itimerspec *); + struct itimerspec64 *, struct itimerspec64 *); static int common_timer_del(struct k_itimer *timer); static enum hrtimer_restart posix_timer_fn(struct hrtimer *data); @@ -204,17 +204,17 @@ static inline void unlock_timer(struct k_itimer *timr, unsigned long flags) } /* Get clock_realtime */ -static int posix_clock_realtime_get(clockid_t which_clock, struct timespec *tp) +static int posix_clock_realtime_get(clockid_t which_clock, struct timespec64 *tp) { - ktime_get_real_ts(tp); + ktime_get_real_ts64(tp); return 0; } /* Set clock_realtime */ static int posix_clock_realtime_set(const clockid_t which_clock, - const struct timespec *tp) + const struct timespec64 *tp) { - return do_sys_settimeofday(tp, NULL); + return do_sys_settimeofday64(tp, NULL); } static int posix_clock_realtime_adj(const clockid_t which_clock, @@ -226,48 +226,48 @@ static int posix_clock_realtime_adj(const clockid_t which_clock, /* * Get monotonic time for posix timers */ -static int posix_ktime_get_ts(clockid_t which_clock, struct timespec *tp) +static int posix_ktime_get_ts(clockid_t which_clock, struct timespec64 *tp) { - ktime_get_ts(tp); + ktime_get_ts64(tp); return 0; } /* * Get monotonic-raw time for posix timers */ -static int posix_get_monotonic_raw(clockid_t which_clock, struct timespec *tp) +static int posix_get_monotonic_raw(clockid_t which_clock, struct timespec64 *tp) { - getrawmonotonic(tp); + getrawmonotonic64(tp); return 0; } -static int posix_get_realtime_coarse(clockid_t which_clock, struct timespec *tp) +static int posix_get_realtime_coarse(clockid_t which_clock, struct timespec64 *tp) { - *tp = current_kernel_time(); + *tp = current_kernel_time64(); return 0; } static int posix_get_monotonic_coarse(clockid_t which_clock, - struct timespec *tp) + struct timespec64 *tp) { - *tp = get_monotonic_coarse(); + *tp = get_monotonic_coarse64(); return 0; } -static int posix_get_coarse_res(const clockid_t which_clock, struct timespec *tp) +static int posix_get_coarse_res(const clockid_t which_clock, struct timespec64 *tp) { - *tp = ktime_to_timespec(KTIME_LOW_RES); + *tp = ktime_to_timespec64(KTIME_LOW_RES); return 0; } -static int posix_get_boottime(const clockid_t which_clock, struct timespec *tp) +static int posix_get_boottime(const clockid_t which_clock, struct timespec64 *tp) { - get_monotonic_boottime(tp); + get_monotonic_boottime64(tp); return 0; } -static int posix_get_tai(clockid_t which_clock, struct timespec *tp) +static int posix_get_tai(clockid_t which_clock, struct timespec64 *tp) { timekeeping_clocktai(tp); return 0; @@ -279,57 +279,57 @@ static int posix_get_tai(clockid_t which_clock, struct timespec *tp) static __init int init_posix_timers(void) { struct k_clock clock_realtime = { - .clock_getres = hrtimer_get_res, - .clock_get = posix_clock_realtime_get, - .clock_set = posix_clock_realtime_set, + .clock_getres64 = hrtimer_get_res64, + .clock_get64 = posix_clock_realtime_get, + .clock_set64 = posix_clock_realtime_set, .clock_adj = posix_clock_realtime_adj, .nsleep = common_nsleep, .nsleep_restart = hrtimer_nanosleep_restart, .timer_create = common_timer_create, - .timer_set = common_timer_set, - .timer_get = common_timer_get, + .timer_set64 = common_timer_set, + .timer_get64 = common_timer_get, .timer_del = common_timer_del, }; struct k_clock clock_monotonic = { - .clock_getres = hrtimer_get_res, - .clock_get = posix_ktime_get_ts, + .clock_getres64 = hrtimer_get_res64, + .clock_get64 = posix_ktime_get_ts, .nsleep = common_nsleep, .nsleep_restart = hrtimer_nanosleep_restart, .timer_create = common_timer_create, - .timer_set = common_timer_set, - .timer_get = common_timer_get, + .timer_set64 = common_timer_set, + .timer_get64 = common_timer_get, .timer_del = common_timer_del, }; struct k_clock clock_monotonic_raw = { - .clock_getres = hrtimer_get_res, - .clock_get = posix_get_monotonic_raw, + .clock_getres64 = hrtimer_get_res64, + .clock_get64 = posix_get_monotonic_raw, }; struct k_clock clock_realtime_coarse = { - .clock_getres = posix_get_coarse_res, - .clock_get = posix_get_realtime_coarse, + .clock_getres64 = posix_get_coarse_res, + .clock_get64 = posix_get_realtime_coarse, }; struct k_clock clock_monotonic_coarse = { - .clock_getres = posix_get_coarse_res, - .clock_get = posix_get_monotonic_coarse, + .clock_getres64 = posix_get_coarse_res, + .clock_get64 = posix_get_monotonic_coarse, }; struct k_clock clock_tai = { - .clock_getres = hrtimer_get_res, - .clock_get = posix_get_tai, + .clock_getres64 = hrtimer_get_res64, + .clock_get64 = posix_get_tai, .nsleep = common_nsleep, .nsleep_restart = hrtimer_nanosleep_restart, .timer_create = common_timer_create, - .timer_set = common_timer_set, - .timer_get = common_timer_get, + .timer_set64 = common_timer_set, + .timer_get64 = common_timer_get, .timer_del = common_timer_del, }; struct k_clock clock_boottime = { - .clock_getres = hrtimer_get_res, - .clock_get = posix_get_boottime, + .clock_getres64 = hrtimer_get_res64, + .clock_get64 = posix_get_boottime, .nsleep = common_nsleep, .nsleep_restart = hrtimer_nanosleep_restart, .timer_create = common_timer_create, - .timer_set = common_timer_set, - .timer_get = common_timer_get, + .timer_set64 = common_timer_set, + .timer_get64 = common_timer_get, .timer_del = common_timer_del, }; @@ -790,7 +790,7 @@ static struct k_itimer *__lock_timer(timer_t timer_id, unsigned long *flags) * report. */ static void -common_timer_get(struct k_itimer *timr, struct itimerspec *cur_setting) +common_timer_get(struct k_itimer *timr, struct itimerspec64 *cur_setting) { ktime_t now, remaining, iv; struct hrtimer *timer = &timr->it.real.timer; @@ -801,7 +801,7 @@ common_timer_get(struct k_itimer *timr, struct itimerspec *cur_setting) /* interval timer ? */ if (iv.tv64) - cur_setting->it_interval = ktime_to_timespec(iv); + cur_setting->it_interval = ktime_to_timespec64(iv); else if (!hrtimer_active(timer) && (timr->it_sigev_notify & ~SIGEV_THREAD_ID) != SIGEV_NONE) return; @@ -827,7 +827,7 @@ common_timer_get(struct k_itimer *timr, struct itimerspec *cur_setting) if ((timr->it_sigev_notify & ~SIGEV_THREAD_ID) != SIGEV_NONE) cur_setting->it_value.tv_nsec = 1; } else - cur_setting->it_value = ktime_to_timespec(remaining); + cur_setting->it_value = ktime_to_timespec64(remaining); } static int __timer_gettime(timer_t timer_id, struct itimerspec64 *cur_setting) @@ -902,7 +902,7 @@ SYSCALL_DEFINE1(timer_getoverrun, timer_t, timer_id) /* timr->it_lock is taken. */ static int common_timer_set(struct k_itimer *timr, int flags, - struct itimerspec *new_setting, struct itimerspec *old_setting) + struct itimerspec64 *new_setting, struct itimerspec64 *old_setting) { struct hrtimer *timer = &timr->it.real.timer; enum hrtimer_mode mode; @@ -931,10 +931,10 @@ common_timer_set(struct k_itimer *timr, int flags, hrtimer_init(&timr->it.real.timer, timr->it_clock, mode); timr->it.real.timer.function = posix_timer_fn; - hrtimer_set_expires(timer, timespec_to_ktime(new_setting->it_value)); + hrtimer_set_expires(timer, timespec64_to_ktime(new_setting->it_value)); /* Convert interval */ - timr->it.real.interval = timespec_to_ktime(new_setting->it_interval); + timr->it.real.interval = timespec64_to_ktime(new_setting->it_interval); /* SIGEV_NONE timers are not queued ! See common_timer_get */ if (((timr->it_sigev_notify & ~SIGEV_THREAD_ID) == SIGEV_NONE)) { diff --git a/kernel/time/timekeeping.h b/kernel/time/timekeeping.h index 1d91416..144af14 100644 --- a/kernel/time/timekeeping.h +++ b/kernel/time/timekeeping.h @@ -15,7 +15,7 @@ extern u64 timekeeping_max_deferment(void); extern int timekeeping_inject_offset(struct timespec *ts); extern s32 timekeeping_get_tai_offset(void); extern void timekeeping_set_tai_offset(s32 tai_offset); -extern void timekeeping_clocktai(struct timespec *ts); +extern void timekeeping_clocktai(struct timespec64 *ts); extern int timekeeping_suspend(void); extern void timekeeping_resume(void); -- 1.7.9.5

9 years, 7 months

[PATCH] Staging: media: Replace timeva with ktime_t

by Ksenija Stanojevic

'struct timeval last_tv' is used to get the time of last signal change and 'struct timeval last_intr_tv' is used to get the time of last UART interrupt. 32-bit systems using 'struct timeval' will break in the year 2038, so we have to replace that code with more appropriate types. Here struct timeval is replaced with ktime_t. Signed-off-by: Ksenija Stanojevic <ksenija.stanojevic(a)gmail.com> --- drivers/staging/media/lirc/lirc_sir.c | 41 ++++++++++++++--------------------- 1 file changed, 16 insertions(+), 25 deletions(-) diff --git a/drivers/staging/media/lirc/lirc_sir.c b/drivers/staging/media/lirc/lirc_sir.c index 29087f6..a4ea2b1 100644 --- a/drivers/staging/media/lirc/lirc_sir.c +++ b/drivers/staging/media/lirc/lirc_sir.c @@ -44,7 +44,7 @@ #include <linux/ioport.h> #include <linux/kernel.h> #include <linux/serial_reg.h> -#include <linux/time.h> +#include <linux/ktime.h> #include <linux/string.h> #include <linux/types.h> #include <linux/wait.h> @@ -127,9 +127,9 @@ static int threshold = 3; static DEFINE_SPINLOCK(timer_lock); static struct timer_list timerlist; /* time of last signal change detected */ -static struct timeval last_tv = {0, 0}; +static ktime_t last_tv; /* time of last UART data ready interrupt */ -static struct timeval last_intr_tv = {0, 0}; +static ktime_t last_intr_tv; static int last_value; static DECLARE_WAIT_QUEUE_HEAD(lirc_read_queue); @@ -400,17 +400,16 @@ static void drop_chrdev(void) } /* SECTION: Hardware */ -static long delta(struct timeval *tv1, struct timeval *tv2) +static long delta(ktime_t tv1, ktime_t tv2) { unsigned long deltv; + ktime_t delkt; - deltv = tv2->tv_sec - tv1->tv_sec; - if (deltv > 15) + delkt = ktime_sub(tv2, tv1); + if (ktime_compare(delkt, ktime_set(15, 0)) > 0) deltv = 0xFFFFFF; else - deltv = deltv*1000000 + - tv2->tv_usec - - tv1->tv_usec; + deltv = (int)ktime_to_us(delkt); return deltv; } @@ -432,7 +431,7 @@ static void sir_timeout(unsigned long data) /* clear unread bits in UART and restart */ outb(UART_FCR_CLEAR_RCVR, io + UART_FCR); /* determine 'virtual' pulse end: */ - pulse_end = delta(&last_tv, &last_intr_tv); + pulse_end = delta(last_tv, last_intr_tv); dev_dbg(driver.dev, "timeout add %d for %lu usec\n", last_value, pulse_end); add_read_queue(last_value, pulse_end); @@ -445,7 +444,7 @@ static void sir_timeout(unsigned long data) static irqreturn_t sir_interrupt(int irq, void *dev_id) { unsigned char data; - struct timeval curr_tv; + ktime_t curr_tv; static unsigned long deltv; unsigned long deltintrtv; unsigned long flags; @@ -471,9 +470,9 @@ static irqreturn_t sir_interrupt(int irq, void *dev_id) do { del_timer(&timerlist); data = inb(io + UART_RX); - do_gettimeofday(&curr_tv); - deltv = delta(&last_tv, &curr_tv); - deltintrtv = delta(&last_intr_tv, &curr_tv); + curr_tv = ktime_get(); + deltv = delta(last_tv, curr_tv); + deltintrtv = delta(last_intr_tv, curr_tv); dev_dbg(driver.dev, "t %lu, d %d\n", deltintrtv, (int)data); /* @@ -488,10 +487,7 @@ static irqreturn_t sir_interrupt(int irq, void *dev_id) deltv - deltintrtv); last_value = 0; - last_tv.tv_sec = - last_intr_tv.tv_sec; - last_tv.tv_usec = - last_intr_tv.tv_usec; + last_tv = last_intr_tv; deltv = deltintrtv; } } @@ -505,13 +501,8 @@ static irqreturn_t sir_interrupt(int irq, void *dev_id) deltv-TIME_CONST); last_value = data; last_tv = curr_tv; - if (last_tv.tv_usec >= TIME_CONST) { - last_tv.tv_usec -= TIME_CONST; - } else { - last_tv.tv_sec--; - last_tv.tv_usec += 1000000 - - TIME_CONST; - } + last_tv = ktime_sub_us(last_tv, + TIME_CONST); } last_intr_tv = curr_tv; if (data) { -- 1.9.1

9 years, 7 months

[PATCH v3 07/22] posix-timers:Convert to the 64bit methods for the timer_settime syscall function

by Baolin Wang

This patch introduces the timer_settime64 methods with itimerspec64 type for k_clock structure. Convert to the 64bit methods with timespec64/itimerspec64 type for the timer_settime syscall function, and change the timer_settime syscall implementation according the the CONFIG_64BIT macro. Signed-off-by: Baolin Wang <baolin.wang(a)linaro.org> --- include/linux/posix-timers.h | 3 +++ kernel/time/posix-timers.c | 40 +++++++++++++++++++++++++++++++++++----- 2 files changed, 38 insertions(+), 5 deletions(-) diff --git a/include/linux/posix-timers.h b/include/linux/posix-timers.h index e84436b..870ab93 100644 --- a/include/linux/posix-timers.h +++ b/include/linux/posix-timers.h @@ -109,6 +109,9 @@ struct k_clock { 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, diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index 0ec9647..f2fde32 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -524,6 +524,17 @@ static int default_timer_get64(struct k_itimer *timr, return 0; } +static int default_timer_set64(struct k_itimer *timr, int flags, + struct itimerspec64 *new_setting64, + struct itimerspec64 *old_setting64) +{ + struct k_clock *kc = clockid_to_kclock(timr->it_clock); + struct itimerspec new_setting, old_setting; + + kc->timer_set(timr, flags, &new_setting, &old_setting); + return 0; +} + void posix_timers_register_clock(const clockid_t clock_id, struct k_clock *new_clock) { @@ -546,6 +557,8 @@ void posix_timers_register_clock(const clockid_t clock_id, if (new_clock->timer_get && !new_clock->timer_get64) new_clock->timer_get64 = default_timer_get64; + if (new_clock->timer_set && !new_clock->timer_set64) + new_clock->timer_set64 = default_timer_set64; posix_clocks[clock_id] = *new_clock; } @@ -899,8 +912,8 @@ common_timer_set(struct k_itimer *timr, int flags, return 0; } -static int __timer_settime(timer_t timer_id, int flags, struct itimerspec *new_spec, - struct itimerspec *old_spec) +static int __timer_settime(timer_t timer_id, int flags, struct itimerspec64 *new_spec, + struct itimerspec64 *old_spec) { struct k_itimer *timr; int error = 0; @@ -913,10 +926,10 @@ retry: return -EINVAL; kc = clockid_to_kclock(timr->it_clock); - if (WARN_ON_ONCE(!kc || !kc->timer_set)) + if (WARN_ON_ONCE(!kc || !kc->timer_set64)) error = -EINVAL; else - error = kc->timer_set(timr, flags, new_spec, old_spec); + error = kc->timer_set64(timr, flags, new_spec, old_spec); unlock_timer(timr, flag); if (error == TIMER_RETRY) { @@ -932,9 +945,16 @@ SYSCALL_DEFINE4(timer_settime, timer_t, timer_id, int, flags, const struct itimerspec __user *, new_setting, struct itimerspec __user *, old_setting) { - struct itimerspec new_spec, old_spec; int error = 0; +#ifdef CONFIG_64BIT + struct itimerspec64 new_spec, old_spec; + struct itimerspec64 *rtn = old_setting ? &old_spec : NULL; +#else + struct itimerspec new_spec, old_spec; struct itimerspec *rtn = old_setting ? &old_spec : NULL; + struct itimerspec64 new_spec64; + struct itimerspec64 *rtn64; +#endif if (!new_setting) return -EINVAL; @@ -946,7 +966,17 @@ SYSCALL_DEFINE4(timer_settime, timer_t, timer_id, int, flags, !timespec_valid(&new_spec.it_value)) return -EINVAL; +#ifdef CONFIG_64BIT error = __timer_settime(timer_id, flags, &new_spec, rtn); +#else + new_spec64 = itimerspec_to_itimerspec64(&new_spec); + if (rtn) + *rtn64 = itimerspec_to_itimerspec64(rtn); + else + rtn64 = NULL; + + error = __timer_settime(timer_id, flags, &new_spec64, rtn64); +#endif if (old_setting && !error && copy_to_user(old_setting, &old_spec, sizeof (old_spec))) -- 1.7.9.5

9 years, 7 months

[PATCH] [media] dvb-frontend: Replace timeval with ktime_t

by Tina Ruchandani

struct timeval uses a 32-bit seconds representation which will overflow in the year 2038 and beyond. This patch replaces the usage of struct timeval with ktime_t which is a 64-bit timestamp and is year 2038 safe. This patch is part of a larger attempt to remove all instances of 32-bit timekeeping variables (timeval, timespec, time_t) which are not year 2038 safe, from the kernel. The patch is a work-in-progress - correctness of the following changes is unclear: (a) Usage of timeval_usec_diff - The function seems to subtract usec values without caring about the difference of the seconds field. There may be an implicit assumption in the original code that the time delta is always of the order of microseconds. The patch replaces the usage of timeval_usec_diff with ktime_to_us(ktime_sub()) which computes the real timestamp difference, not just the difference in the usec field. (b) printk diffing the tv[i] and tv[i-1] values. The original printk statement seems to get the order wrong. This patch preserves that order. Signed-off-by: Tina Ruchandani <ruchandani.tina(a)gmail.com> --- drivers/media/dvb-core/dvb_frontend.c | 46 ++++++++++++----------------------- drivers/media/dvb-core/dvb_frontend.h | 3 +-- drivers/media/dvb-frontends/stv0299.c | 15 ++++++------ 3 files changed, 24 insertions(+), 40 deletions(-) diff --git a/drivers/media/dvb-core/dvb_frontend.c b/drivers/media/dvb-core/dvb_frontend.c index 882ca41..48c3daf 100644 --- a/drivers/media/dvb-core/dvb_frontend.c +++ b/drivers/media/dvb-core/dvb_frontend.c @@ -40,6 +40,7 @@ #include <linux/freezer.h> #include <linux/jiffies.h> #include <linux/kthread.h> +#include <linux/ktime.h> #include <asm/processor.h> #include "dvb_frontend.h" @@ -889,42 +890,25 @@ static void dvb_frontend_stop(struct dvb_frontend *fe) fepriv->thread); } -s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime) -{ - return ((curtime.tv_usec < lasttime.tv_usec) ? - 1000000 - lasttime.tv_usec + curtime.tv_usec : - curtime.tv_usec - lasttime.tv_usec); -} -EXPORT_SYMBOL(timeval_usec_diff); - -static inline void timeval_usec_add(struct timeval *curtime, u32 add_usec) -{ - curtime->tv_usec += add_usec; - if (curtime->tv_usec >= 1000000) { - curtime->tv_usec -= 1000000; - curtime->tv_sec++; - } -} - /* * Sleep until gettimeofday() > waketime + add_usec * This needs to be as precise as possible, but as the delay is * usually between 2ms and 32ms, it is done using a scheduled msleep * followed by usleep (normally a busy-wait loop) for the remainder */ -void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec) +void dvb_frontend_sleep_until(ktime_t waketime, u32 add_usec) { - struct timeval lasttime; + ktime_t lasttime; s32 delta, newdelta; - timeval_usec_add(waketime, add_usec); + ktime_add_us(waketime, add_usec); - do_gettimeofday(&lasttime); - delta = timeval_usec_diff(lasttime, *waketime); + lasttime = ktime_get_real(); + delta = ktime_to_us(ktime_sub(lasttime, waketime)); if (delta > 2500) { msleep((delta - 1500) / 1000); - do_gettimeofday(&lasttime); - newdelta = timeval_usec_diff(lasttime, *waketime); + lasttime = ktime_get_real(); + newdelta = ktime_to_us(ktime_sub(lasttime, waketime)); delta = (newdelta > delta) ? 0 : newdelta; } if (delta > 0) @@ -2458,24 +2442,24 @@ static int dvb_frontend_ioctl_legacy(struct file *file, * include the initialization or start bit */ unsigned long swcmd = ((unsigned long) parg) << 1; - struct timeval nexttime; - struct timeval tv[10]; + ktime_t nexttime; + ktime_t tv[10]; int i; u8 last = 1; if (dvb_frontend_debug) printk("%s switch command: 0x%04lx\n", __func__, swcmd); - do_gettimeofday(&nexttime); + nexttime = ktime_get_real(); if (dvb_frontend_debug) tv[0] = nexttime; /* before sending a command, initialize by sending * a 32ms 18V to the switch */ fe->ops.set_voltage(fe, SEC_VOLTAGE_18); - dvb_frontend_sleep_until(&nexttime, 32000); + dvb_frontend_sleep_until(nexttime, 32000); for (i = 0; i < 9; i++) { if (dvb_frontend_debug) - do_gettimeofday(&tv[i + 1]); + tv[i+1] = ktime_get_real(); if ((swcmd & 0x01) != last) { /* set voltage to (last ? 13V : 18V) */ fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18); @@ -2483,13 +2467,13 @@ static int dvb_frontend_ioctl_legacy(struct file *file, } swcmd = swcmd >> 1; if (i != 8) - dvb_frontend_sleep_until(&nexttime, 8000); + dvb_frontend_sleep_until(nexttime, 8000); } if (dvb_frontend_debug) { printk("%s(%d): switch delay (should be 32k followed by all 8k\n", __func__, fe->dvb->num); for (i = 1; i < 10; i++) - printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i])); + printk("%d: %d\n", i, (int) ktime_to_us(ktime_sub(tv[i-1], tv[i]))); } err = 0; fepriv->state = FESTATE_DISEQC; diff --git a/drivers/media/dvb-core/dvb_frontend.h b/drivers/media/dvb-core/dvb_frontend.h index 816269e..5ddd55f 100644 --- a/drivers/media/dvb-core/dvb_frontend.h +++ b/drivers/media/dvb-core/dvb_frontend.h @@ -439,7 +439,6 @@ extern void dvb_frontend_reinitialise(struct dvb_frontend *fe); extern int dvb_frontend_suspend(struct dvb_frontend *fe); extern int dvb_frontend_resume(struct dvb_frontend *fe); -extern void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec); -extern s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime); +extern void dvb_frontend_sleep_until(ktime_t waketime, u32 add_usec); #endif diff --git a/drivers/media/dvb-frontends/stv0299.c b/drivers/media/dvb-frontends/stv0299.c index b57ecf4..8d30865 100644 --- a/drivers/media/dvb-frontends/stv0299.c +++ b/drivers/media/dvb-frontends/stv0299.c @@ -44,6 +44,7 @@ #include <linux/init.h> #include <linux/kernel.h> +#include <linux/ktime.h> #include <linux/module.h> #include <linux/string.h> #include <linux/slab.h> @@ -404,8 +405,8 @@ static int stv0299_send_legacy_dish_cmd (struct dvb_frontend* fe, unsigned long u8 lv_mask = 0x40; u8 last = 1; int i; - struct timeval nexttime; - struct timeval tv[10]; + ktime_t nexttime; + ktime_t tv[10]; reg0x08 = stv0299_readreg (state, 0x08); reg0x0c = stv0299_readreg (state, 0x0c); @@ -418,16 +419,16 @@ static int stv0299_send_legacy_dish_cmd (struct dvb_frontend* fe, unsigned long if (debug_legacy_dish_switch) printk ("%s switch command: 0x%04lx\n",__func__, cmd); - do_gettimeofday (&nexttime); + nexttime = ktime_get_real(); if (debug_legacy_dish_switch) tv[0] = nexttime; stv0299_writeregI (state, 0x0c, reg0x0c | 0x50); /* set LNB to 18V */ - dvb_frontend_sleep_until(&nexttime, 32000); + dvb_frontend_sleep_until(nexttime, 32000); for (i=0; i<9; i++) { if (debug_legacy_dish_switch) - do_gettimeofday (&tv[i+1]); + tv[i+1] = ktime_get_real(); if((cmd & 0x01) != last) { /* set voltage to (last ? 13V : 18V) */ stv0299_writeregI (state, 0x0c, reg0x0c | (last ? lv_mask : 0x50)); @@ -437,13 +438,13 @@ static int stv0299_send_legacy_dish_cmd (struct dvb_frontend* fe, unsigned long cmd = cmd >> 1; if (i != 8) - dvb_frontend_sleep_until(&nexttime, 8000); + dvb_frontend_sleep_until(nexttime, 8000); } if (debug_legacy_dish_switch) { printk ("%s(%d): switch delay (should be 32k followed by all 8k\n", __func__, fe->dvb->num); for (i = 1; i < 10; i++) - printk ("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i])); + printk("%d: %d\n", i, (int) ktime_to_us(ktime_sub(tv[i-1], tv[i]))); } return 0; -- 2.2.0.rc0.207.ga3a616c

9 years, 7 months

[PATCH v2] Staging: media: Replace timeval with ktime_t

by Ksenija Stanojevic

'struct timeval last_tv' is used to get the time of last signal change and 'struct timeval last_intr_tv' is used to get the time of last UART interrupt. 32-bit systems using 'struct timeval' will break in the year 2038, so we have to replace that code with more appropriate types. Here struct timeval is replaced with ktime_t. Signed-off-by: Ksenija Stanojevic <ksenija.stanojevic(a)gmail.com> --- Changes in v2: - change subject line drivers/staging/media/lirc/lirc_sir.c | 41 ++++++++++++++--------------------- 1 file changed, 16 insertions(+), 25 deletions(-) diff --git a/drivers/staging/media/lirc/lirc_sir.c b/drivers/staging/media/lirc/lirc_sir.c index 29087f6..a4ea2b1 100644 --- a/drivers/staging/media/lirc/lirc_sir.c +++ b/drivers/staging/media/lirc/lirc_sir.c @@ -44,7 +44,7 @@ #include <linux/ioport.h> #include <linux/kernel.h> #include <linux/serial_reg.h> -#include <linux/time.h> +#include <linux/ktime.h> #include <linux/string.h> #include <linux/types.h> #include <linux/wait.h> @@ -127,9 +127,9 @@ static int threshold = 3; static DEFINE_SPINLOCK(timer_lock); static struct timer_list timerlist; /* time of last signal change detected */ -static struct timeval last_tv = {0, 0}; +static ktime_t last_tv; /* time of last UART data ready interrupt */ -static struct timeval last_intr_tv = {0, 0}; +static ktime_t last_intr_tv; static int last_value; static DECLARE_WAIT_QUEUE_HEAD(lirc_read_queue); @@ -400,17 +400,16 @@ static void drop_chrdev(void) } /* SECTION: Hardware */ -static long delta(struct timeval *tv1, struct timeval *tv2) +static long delta(ktime_t tv1, ktime_t tv2) { unsigned long deltv; + ktime_t delkt; - deltv = tv2->tv_sec - tv1->tv_sec; - if (deltv > 15) + delkt = ktime_sub(tv2, tv1); + if (ktime_compare(delkt, ktime_set(15, 0)) > 0) deltv = 0xFFFFFF; else - deltv = deltv*1000000 + - tv2->tv_usec - - tv1->tv_usec; + deltv = (int)ktime_to_us(delkt); return deltv; } @@ -432,7 +431,7 @@ static void sir_timeout(unsigned long data) /* clear unread bits in UART and restart */ outb(UART_FCR_CLEAR_RCVR, io + UART_FCR); /* determine 'virtual' pulse end: */ - pulse_end = delta(&last_tv, &last_intr_tv); + pulse_end = delta(last_tv, last_intr_tv); dev_dbg(driver.dev, "timeout add %d for %lu usec\n", last_value, pulse_end); add_read_queue(last_value, pulse_end); @@ -445,7 +444,7 @@ static void sir_timeout(unsigned long data) static irqreturn_t sir_interrupt(int irq, void *dev_id) { unsigned char data; - struct timeval curr_tv; + ktime_t curr_tv; static unsigned long deltv; unsigned long deltintrtv; unsigned long flags; @@ -471,9 +470,9 @@ static irqreturn_t sir_interrupt(int irq, void *dev_id) do { del_timer(&timerlist); data = inb(io + UART_RX); - do_gettimeofday(&curr_tv); - deltv = delta(&last_tv, &curr_tv); - deltintrtv = delta(&last_intr_tv, &curr_tv); + curr_tv = ktime_get(); + deltv = delta(last_tv, curr_tv); + deltintrtv = delta(last_intr_tv, curr_tv); dev_dbg(driver.dev, "t %lu, d %d\n", deltintrtv, (int)data); /* @@ -488,10 +487,7 @@ static irqreturn_t sir_interrupt(int irq, void *dev_id) deltv - deltintrtv); last_value = 0; - last_tv.tv_sec = - last_intr_tv.tv_sec; - last_tv.tv_usec = - last_intr_tv.tv_usec; + last_tv = last_intr_tv; deltv = deltintrtv; } } @@ -505,13 +501,8 @@ static irqreturn_t sir_interrupt(int irq, void *dev_id) deltv-TIME_CONST); last_value = data; last_tv = curr_tv; - if (last_tv.tv_usec >= TIME_CONST) { - last_tv.tv_usec -= TIME_CONST; - } else { - last_tv.tv_sec--; - last_tv.tv_usec += 1000000 - - TIME_CONST; - } + last_tv = ktime_sub_us(last_tv, + TIME_CONST); } last_intr_tv = curr_tv; if (data) { -- 1.9.1

9 years, 7 months

[PATCH] isdn: Use ktime_t instead of 'struct timeval'

by Tina Ruchandani

'struct timeval' uses 32-bit representation for seconds which will overflow in year 2038 and beyond. mISDN/clock.c needs to compute and store elapsed time in intervals of 125 microseconds. This patch replaces the usage of 'struct timeval' with 64-bit ktime_t which is y2038 safe. The patch also replaces use of wall-clock time (do_gettimeofday) with monotonic time (ktime_get) since we only care about elapsed time here. Signed-off-by: Tina Ruchandani <ruchandani.tina(a)gmail.com> --- drivers/isdn/mISDN/clock.c | 53 +++++++++++++++++----------------------------- include/linux/mISDNif.h | 2 +- 2 files changed, 21 insertions(+), 34 deletions(-) diff --git a/drivers/isdn/mISDN/clock.c b/drivers/isdn/mISDN/clock.c index 693fb7c..7550f2e 100644 --- a/drivers/isdn/mISDN/clock.c +++ b/drivers/isdn/mISDN/clock.c @@ -37,6 +37,7 @@ #include <linux/types.h> #include <linux/stddef.h> #include <linux/spinlock.h> +#include <linux/ktime.h> #include <linux/mISDNif.h> #include <linux/export.h> #include "core.h" @@ -45,7 +46,7 @@ static u_int *debug; static LIST_HEAD(iclock_list); static DEFINE_RWLOCK(iclock_lock); static u16 iclock_count; /* counter of last clock */ -static struct timeval iclock_tv; /* time stamp of last clock */ +static ktime_t iclock_tv; /* time stamp of last clock */ static int iclock_tv_valid; /* already received one timestamp */ static struct mISDNclock *iclock_current; @@ -53,7 +54,7 @@ void mISDN_init_clock(u_int *dp) { debug = dp; - do_gettimeofday(&iclock_tv); + iclock_tv = ktime_get(); } static void @@ -139,12 +140,11 @@ mISDN_unregister_clock(struct mISDNclock *iclock) EXPORT_SYMBOL(mISDN_unregister_clock); void -mISDN_clock_update(struct mISDNclock *iclock, int samples, struct timeval *tv) +mISDN_clock_update(struct mISDNclock *iclock, int samples, ktime_t *tv) { u_long flags; - struct timeval tv_now; - time_t elapsed_sec; - int elapsed_8000th; + ktime_t tv_now; + u16 delta; write_lock_irqsave(&iclock_lock, flags); if (iclock_current != iclock) { @@ -160,28 +160,20 @@ mISDN_clock_update(struct mISDNclock *iclock, int samples, struct timeval *tv) /* increment sample counter by given samples */ iclock_count += samples; if (tv) { /* tv must be set, if function call is delayed */ - iclock_tv.tv_sec = tv->tv_sec; - iclock_tv.tv_usec = tv->tv_usec; + iclock_tv = *tv; } else - do_gettimeofday(&iclock_tv); + iclock_tv = ktime_get(); } else { /* calc elapsed time by system clock */ if (tv) { /* tv must be set, if function call is delayed */ - tv_now.tv_sec = tv->tv_sec; - tv_now.tv_usec = tv->tv_usec; + tv_now = *tv; } else - do_gettimeofday(&tv_now); - elapsed_sec = tv_now.tv_sec - iclock_tv.tv_sec; - elapsed_8000th = (tv_now.tv_usec / 125) - - (iclock_tv.tv_usec / 125); - if (elapsed_8000th < 0) { - elapsed_sec -= 1; - elapsed_8000th += 8000; - } + tv_now = ktime_get(); + delta = ktime_to_us(ktime_sub(tv_now, iclock_tv)); + delta = delta / 125; /* add elapsed time to counter and set new timestamp */ - iclock_count += elapsed_sec * 8000 + elapsed_8000th; - iclock_tv.tv_sec = tv_now.tv_sec; - iclock_tv.tv_usec = tv_now.tv_usec; + iclock_count += delta; + iclock_tv = tv_now; iclock_tv_valid = 1; if (*debug & DEBUG_CLOCK) printk("Received first clock from source '%s'.\n", @@ -195,22 +187,17 @@ unsigned short mISDN_clock_get(void) { u_long flags; - struct timeval tv_now; - time_t elapsed_sec; - int elapsed_8000th; + ktime_t tv_now; + u16 delta; u16 count; read_lock_irqsave(&iclock_lock, flags); /* calc elapsed time by system clock */ - do_gettimeofday(&tv_now); - elapsed_sec = tv_now.tv_sec - iclock_tv.tv_sec; - elapsed_8000th = (tv_now.tv_usec / 125) - (iclock_tv.tv_usec / 125); - if (elapsed_8000th < 0) { - elapsed_sec -= 1; - elapsed_8000th += 8000; - } + tv_now = ktime_get(); + delta = ktime_to_us(ktime_sub(tv_now, iclock_tv)); + delta = delta / 125; /* add elapsed time to counter */ - count = iclock_count + elapsed_sec * 8000 + elapsed_8000th; + count = iclock_count + delta; read_unlock_irqrestore(&iclock_lock, flags); return count; } diff --git a/include/linux/mISDNif.h b/include/linux/mISDNif.h index 246a352..ac02c54 100644 --- a/include/linux/mISDNif.h +++ b/include/linux/mISDNif.h @@ -596,7 +596,7 @@ static inline struct mISDNdevice *dev_to_mISDN(struct device *dev) } extern void set_channel_address(struct mISDNchannel *, u_int, u_int); -extern void mISDN_clock_update(struct mISDNclock *, int, struct timeval *); +extern void mISDN_clock_update(struct mISDNclock *, int, ktime_t *); extern unsigned short mISDN_clock_get(void); extern const char *mISDNDevName4ch(struct mISDNchannel *); -- 2.2.0.rc0.207.ga3a616c

9 years, 7 months

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