Y2038

y2038@lists.linaro.org

1135 discussions

[PATCH v4 16/25] 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. 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 | 31 ++++++++++++++++++++++++------- 2 files changed, 25 insertions(+), 7 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 3bb5bee..d2975d9 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -596,6 +596,20 @@ 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) { @@ -610,8 +624,8 @@ 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; } @@ -624,6 +638,8 @@ 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; } @@ -671,7 +687,8 @@ 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]; } @@ -1180,25 +1197,25 @@ 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; + struct timespec64 rtn_tp; int error; error = __clock_getres(which_clock, &rtn_tp); - if (!error && tp && copy_to_user(tp, &rtn_tp, sizeof (rtn_tp))) + if (!error && tp && put_timespec(&rtn_tp, tp)) error = -EFAULT; return error; -- 1.7.9.5

10 years, 1 month

[PATCH v4 15/25] posix-timers:Change the implementation for clock_getres syscall function

by Baolin Wang

This patch splits out the guts of the clock_getres syscall and changes the clock_getres syscall implementation to prepare the converting to 64bit methods for the clock_getres syscall function in posix-timers.c file. Signed-off-by: Baolin Wang <baolin.wang(a)linaro.org> --- kernel/time/posix-timers.c | 16 +++++++++++----- 1 file changed, 11 insertions(+), 5 deletions(-) diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index 9b5352a..3bb5bee 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -1180,17 +1180,23 @@ SYSCALL_DEFINE2(clock_adjtime, const clockid_t, which_clock, return err; } -SYSCALL_DEFINE2(clock_getres, const clockid_t, which_clock, - struct timespec __user *, tp) +static int __clock_getres(clockid_t which_clock, struct timespec *ts) { struct k_clock *kc = clockid_to_kclock(which_clock); - struct timespec rtn_tp; - int error; if (!kc) return -EINVAL; - error = kc->clock_getres(which_clock, &rtn_tp); + return kc->clock_getres(which_clock, ts); +} + +SYSCALL_DEFINE2(clock_getres, const clockid_t, which_clock, + struct timespec __user *, tp) +{ + struct timespec rtn_tp; + int error; + + error = __clock_getres(which_clock, &rtn_tp); if (!error && tp && copy_to_user(tp, &rtn_tp, sizeof (rtn_tp))) error = -EFAULT; -- 1.7.9.5

10 years, 1 month

[PATCH v4 14/25] 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. 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 | 28 ++++++++++++++++++++++------ 2 files changed, 23 insertions(+), 6 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 12affd5..9b5352a 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -582,6 +582,20 @@ 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) { @@ -591,8 +605,8 @@ 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; } @@ -608,6 +622,8 @@ 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; } @@ -1117,25 +1133,25 @@ SYSCALL_DEFINE2(clock_settime, const clockid_t, which_clock, return __clock_settime(which_clock, &new_tp); } -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; + struct timespec64 kernel_tp; int error; error = __clock_gettime(which_clock, &kernel_tp); - if (!error && copy_to_user(tp, &kernel_tp, sizeof (kernel_tp))) + if (!error && put_timespec(&kernel_tp, tp)) error = -EFAULT; return error; -- 1.7.9.5

10 years, 1 month

[PATCH v4 13/25] posix-timers:Change the implementation for clock_gettime syscall function

by Baolin Wang

This patch splits out the guts of the clock_gettime syscall and changes the clock_gettime syscall implementation to prepare the converting to 64bit methods for the clock_gettime syscall function in posix-timers.c file. Signed-off-by: Baolin Wang <baolin.wang(a)linaro.org> --- kernel/time/posix-timers.c | 16 +++++++++++----- 1 file changed, 11 insertions(+), 5 deletions(-) diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index 06e2549..12affd5 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -1117,17 +1117,23 @@ SYSCALL_DEFINE2(clock_settime, const clockid_t, which_clock, return __clock_settime(which_clock, &new_tp); } -SYSCALL_DEFINE2(clock_gettime, const clockid_t, which_clock, - struct timespec __user *,tp) +static int __clock_gettime(clockid_t which_clock, struct timespec *ts) { struct k_clock *kc = clockid_to_kclock(which_clock); - struct timespec kernel_tp; - int error; if (!kc) return -EINVAL; - error = kc->clock_get(which_clock, &kernel_tp); + return kc->clock_get(which_clock, ts); +} + +SYSCALL_DEFINE2(clock_gettime, const clockid_t, which_clock, + struct timespec __user *,tp) +{ + struct timespec kernel_tp; + int error; + + error = __clock_gettime(which_clock, &kernel_tp); if (!error && copy_to_user(tp, &kernel_tp, sizeof (kernel_tp))) error = -EFAULT; -- 1.7.9.5

10 years, 1 month

[PATCH v4 12/25] 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. 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 | 24 +++++++++++++++++++----- 2 files changed, 21 insertions(+), 5 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 9912745..06e2549 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -570,6 +570,18 @@ 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) { @@ -594,6 +606,8 @@ 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; } @@ -1082,22 +1096,22 @@ 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) { - struct timespec new_tp; + struct timespec64 new_tp; - if (copy_from_user(&new_tp, tp, sizeof (*tp))) + if (get_timespec(&new_tp, tp)) return -EFAULT; return __clock_settime(which_clock, &new_tp); -- 1.7.9.5

10 years, 1 month

[PATCH v4 11/25] posix-timers:Change the implementation for clock_settime syscall function

by Baolin Wang

This patch splits out the guts of the clock_settime syscall and changes the clock_settime syscall implementation to prepare the converting to 64bit methods for the clock_settime syscall function in posix-timers.c file. Signed-off-by: Baolin Wang <baolin.wang(a)linaro.org> --- kernel/time/posix-timers.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index c034a53..9912745 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -1082,19 +1082,25 @@ void exit_itimers(struct signal_struct *sig) } } -SYSCALL_DEFINE2(clock_settime, const clockid_t, which_clock, - const struct timespec __user *, tp) +static int __clock_settime(clockid_t which_clock, struct timespec *ts) { struct k_clock *kc = clockid_to_kclock(which_clock); - struct timespec new_tp; if (!kc || !kc->clock_set) return -EINVAL; + return kc->clock_set(which_clock, ts); +} + +SYSCALL_DEFINE2(clock_settime, const clockid_t, which_clock, + const struct timespec __user *, tp) +{ + struct timespec new_tp; + if (copy_from_user(&new_tp, tp, sizeof (*tp))) return -EFAULT; - return kc->clock_set(which_clock, &new_tp); + return __clock_settime(which_clock, &new_tp); } SYSCALL_DEFINE2(clock_gettime, const clockid_t, which_clock, -- 1.7.9.5

10 years, 1 month

[PATCH v4 10/25] posix-timers:Convert to the 64bit methods for the timer_settime syscall function

by Baolin Wang

This patch introduces the timer_set64 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_settime syscall function, and change the timer_settime syscall implementation. Also add a default 64bit method for the timer_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 | 3 +++ kernel/time/posix-timers.c | 39 +++++++++++++++++++++++++++++---------- 2 files changed, 32 insertions(+), 10 deletions(-) diff --git a/include/linux/posix-timers.h b/include/linux/posix-timers.h index e84436b..16c3364 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 99ccb3c..c034a53 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -553,6 +553,23 @@ static void default_timer_get64(struct k_itimer *timr, *cur_setting64 = itimerspec_to_itimerspec64(&cur_setting); } +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; + struct itimerspec *rtn = old_setting64 ? &old_setting : NULL; + int ret; + + new_setting = itimerspec64_to_itimerspec(new_setting64); + ret = kc->timer_set(timr, flags, &new_setting, rtn); + if (!ret && old_setting64) + *old_setting64 = itimerspec_to_itimerspec64(&old_setting); + + return ret; +} + void posix_timers_register_clock(const clockid_t clock_id, struct k_clock *new_clock) { @@ -575,6 +592,8 @@ 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; } @@ -920,16 +939,16 @@ 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; unsigned long flag; struct k_clock *kc; - if (!timespec_valid(&new_spec->it_interval) || - !timespec_valid(&new_spec->it_value)) + if (!timespec64_valid(&new_spec->it_interval) || + !timespec64_valid(&new_spec->it_value)) return -EINVAL; retry: @@ -938,10 +957,10 @@ 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) { @@ -957,20 +976,20 @@ 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; + struct itimerspec64 new_spec, old_spec; int error = 0; - struct itimerspec *rtn = old_setting ? &old_spec : NULL; + struct itimerspec64 *rtn = old_setting ? &old_spec : NULL; if (!new_setting) return -EINVAL; - if (copy_from_user(&new_spec, new_setting, sizeof (new_spec))) + if (get_itimerspec(&new_spec, new_setting)) return -EFAULT; error = __timer_settime(timer_id, flags, &new_spec, rtn); if (old_setting && !error && - copy_to_user(old_setting, &old_spec, sizeof (old_spec))) + put_itimerspec(&old_spec, old_setting)) error = -EFAULT; return error; -- 1.7.9.5

10 years, 1 month

[PATCH v4 09/25] posix-timers:Change the implementation for timer_settime syscall

by Baolin Wang

This patch splits out the guts of the timer_settime syscall and changes the timer_settime syscall implementation to prepare the converting to 64bit methods for the timer_settime syscall function in posix-timers.c file. Signed-off-by: Baolin Wang <baolin.wang(a)linaro.org> --- kernel/time/posix-timers.c | 41 ++++++++++++++++++++++++++--------------- 1 file changed, 26 insertions(+), 15 deletions(-) diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index 2adeb29..99ccb3c 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -920,27 +920,18 @@ common_timer_set(struct k_itimer *timr, int flags, return 0; } -/* Set a POSIX.1b interval timer */ -SYSCALL_DEFINE4(timer_settime, timer_t, timer_id, int, flags, - const struct itimerspec __user *, new_setting, - struct itimerspec __user *, old_setting) +static int __timer_settime(timer_t timer_id, int flags, struct itimerspec *new_spec, + struct itimerspec *old_spec) { struct k_itimer *timr; - struct itimerspec new_spec, old_spec; int error = 0; unsigned long flag; - struct itimerspec *rtn = old_setting ? &old_spec : NULL; struct k_clock *kc; - if (!new_setting) + if (!timespec_valid(&new_spec->it_interval) || + !timespec_valid(&new_spec->it_value)) return -EINVAL; - if (copy_from_user(&new_spec, new_setting, sizeof (new_spec))) - return -EFAULT; - - if (!timespec_valid(&new_spec.it_interval) || - !timespec_valid(&new_spec.it_value)) - return -EINVAL; retry: timr = lock_timer(timer_id, &flag); if (!timr) @@ -950,14 +941,34 @@ retry: if (WARN_ON_ONCE(!kc || !kc->timer_set)) error = -EINVAL; else - error = kc->timer_set(timr, flags, &new_spec, rtn); + error = kc->timer_set(timr, flags, new_spec, old_spec); unlock_timer(timr, flag); if (error == TIMER_RETRY) { - rtn = NULL; // We already got the old time... + old_spec = NULL; // We already got the old time... goto retry; } + return error; +} + +/* Set a POSIX.1b interval timer */ +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; + struct itimerspec *rtn = old_setting ? &old_spec : NULL; + + if (!new_setting) + return -EINVAL; + + if (copy_from_user(&new_spec, new_setting, sizeof (new_spec))) + return -EFAULT; + + error = __timer_settime(timer_id, flags, &new_spec, rtn); + if (old_setting && !error && copy_to_user(old_setting, &old_spec, sizeof (old_spec))) error = -EFAULT; -- 1.7.9.5

10 years, 1 month

[PATCH v4] 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 do_gettimeofday (wall-clock time) with ktime_get (monotonic time) since we only care about elapsed time here. Signed-off-by: Tina Ruchandani <ruchandani.tina(a)gmail.com> Suggested-by: Arnd Bergmnann <arnd(a)arndb.de> -- Changes in v4: - Fix compile error (NS_PER_SEC -> NSEC_PER_SEC) Changes in v3: - Use division scheme suggested by Arnd Bergmann to avoid a (64-bit variable) / (32-bit variable) expression. Changes in v2: - Avoid possible truncation bug caused by assigning ktime_us_delta output to a 16-bit number. - Use ktime_us_delta, more concise than a combination of ktime_sub and ktime_to_us. --- drivers/isdn/mISDN/clock.c | 56 ++++++++++++++++++---------------------------- include/linux/mISDNif.h | 2 +- 2 files changed, 23 insertions(+), 35 deletions(-) diff --git a/drivers/isdn/mISDN/clock.c b/drivers/isdn/mISDN/clock.c index 693fb7c..409c508 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 +160,22 @@ 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; - } else - do_gettimeofday(&iclock_tv); + iclock_tv = *tv; + } else { + 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; - } 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 = *tv; + } else { + tv_now = ktime_get(); } + delta = ktime_divns(ktime_sub(tv_now, iclock_tv), + (NSEC_PER_SEC / 8000)); /* 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 +189,16 @@ 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_divns(ktime_sub(tv_now, iclock_tv), + (NSEC_PER_SEC / 8000)); /* 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

10 years, 1 month

[PATCH] drm/exynos/ipp: Replace struct timeval usage

by Tina Ruchandani

'struct timeval' uses a 32-bit seconds representation which will overflow in the year 2038 and beyond. This patch replaces the use of struct timeval with struct timespec64 which uses a 64-bit seconds representation and is y2038 safe. The patch is part of a larger effort to remove all 32-bit timekeeping variables (timeval, time_t and timespec) from the kernel. --- drivers/gpu/drm/exynos/exynos_drm_ipp.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/exynos/exynos_drm_ipp.c b/drivers/gpu/drm/exynos/exynos_drm_ipp.c index b7f1cbc..7cd4a97 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_ipp.c +++ b/drivers/gpu/drm/exynos/exynos_drm_ipp.c @@ -16,6 +16,7 @@ #include <linux/types.h> #include <linux/clk.h> #include <linux/pm_runtime.h> +#include <linux/time64.h> #include <drm/drmP.h> #include <drm/exynos_drm.h> @@ -1414,7 +1415,7 @@ static int ipp_send_event(struct exynos_drm_ippdrv *ippdrv, struct drm_exynos_ipp_queue_buf qbuf; struct drm_exynos_ipp_send_event *e; struct list_head *head; - struct timeval now; + struct timespec64 now; unsigned long flags; u32 tbuf_id[EXYNOS_DRM_OPS_MAX] = {0, }; int ret, i; @@ -1518,10 +1519,11 @@ static int ipp_send_event(struct exynos_drm_ippdrv *ippdrv, e = list_first_entry(&c_node->event_list, struct drm_exynos_ipp_send_event, base.link); - do_gettimeofday(&now); - DRM_DEBUG_KMS("tv_sec[%ld]tv_usec[%ld]\n", now.tv_sec, now.tv_usec); + getnstimeofday64(&now); + DRM_DEBUG_KMS("tv_sec[%lld]tv_usec[%lld]\n", now.tv_sec, (now.tv_nsec / + NSEC_PER_SEC)); e->event.tv_sec = now.tv_sec; - e->event.tv_usec = now.tv_usec; + e->event.tv_usec = now.tv_nsec / NSEC_PER_SEC; e->event.prop_id = property->prop_id; /* set buffer id about source destination */ -- 2.2.0.rc0.207.ga3a616c

10 years, 1 month

Jump to page:

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

Y2038