Y2038 May 2015

y2038@lists.linaro.org

18 participants
63 discussions

[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

8 years, 11 months

[PATCH] xen/pcifront: Remove usage of struct timeval

by Tina Ruchandani

struct timeval uses a 32-bit field for representing seconds, which will overflow in the year 2038 and beyond. This patch replaces struct timeval with 64-bit ktime_t which is 2038 safe. The patch is part of a larger effort to remove instances of 32-bit timekeeping variables (timeval, time_t and timespec) from the kernel. Signed-off-by: Tina Ruchandani <ruchandani.tina(a)gmail.com> --- drivers/pci/xen-pcifront.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/drivers/pci/xen-pcifront.c b/drivers/pci/xen-pcifront.c index 7cfd2db..43d1d6c 100644 --- a/drivers/pci/xen-pcifront.c +++ b/drivers/pci/xen-pcifront.c @@ -20,6 +20,7 @@ #include <linux/workqueue.h> #include <linux/bitops.h> #include <linux/time.h> +#include <linux/ktime.h> #include <xen/platform_pci.h> #include <asm/xen/swiotlb-xen.h> @@ -115,7 +116,7 @@ static int do_pci_op(struct pcifront_device *pdev, struct xen_pci_op *op) evtchn_port_t port = pdev->evtchn; unsigned irq = pdev->irq; s64 ns, ns_timeout; - struct timeval tv; + ktime_t tv; spin_lock_irqsave(&pdev->sh_info_lock, irq_flags); @@ -132,8 +133,8 @@ static int do_pci_op(struct pcifront_device *pdev, struct xen_pci_op *op) * (in the latter case we end up continually re-executing poll() with a * timeout in the past). 1s difference gives plenty of slack for error. */ - do_gettimeofday(&tv); - ns_timeout = timeval_to_ns(&tv) + 2 * (s64)NSEC_PER_SEC; + tv = ktime_get_real(); + ns_timeout = ktime_to_ns(tv) + 2 * (s64)NSEC_PER_SEC; xen_clear_irq_pending(irq); @@ -141,8 +142,8 @@ static int do_pci_op(struct pcifront_device *pdev, struct xen_pci_op *op) (unsigned long *)&pdev->sh_info->flags)) { xen_poll_irq_timeout(irq, jiffies + 3*HZ); xen_clear_irq_pending(irq); - do_gettimeofday(&tv); - ns = timeval_to_ns(&tv); + tv = ktime_get_real(); + ns = ktime_to_ns(tv); if (ns > ns_timeout) { dev_err(&pdev->xdev->dev, "pciback not responding!!!\n"); -- 2.2.0.rc0.207.ga3a616c

8 years, 11 months

[PATCH v3 22/22] k_clock:Remove the 32bit methods with timespec/itimerspec type

by Baolin Wang

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(a)linaro.org> --- include/linux/posix-timers.h | 9 ----- kernel/time/posix-timers.c | 74 +++--------------------------------------- 2 files changed, 5 insertions(+), 78 deletions(-) diff --git a/include/linux/posix-timers.h b/include/linux/posix-timers.h index 9a5a211..2b47d04 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 a5bf0cf..845955f 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -140,7 +140,6 @@ 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; \ @@ -514,57 +513,6 @@ static struct pid *good_sigevent(sigevent_t * event) return task_pid(rtn); } -static int 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); - 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; -} - -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; - - kc->clock_set(which_clock, &tp); - return 0; -} - -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; - - kc->clock_get(which_clock, &tp); - return 0; -} - -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; - - kc->clock_getres(which_clock, &tp); - return 0; -} - void posix_timers_register_clock(const clockid_t clock_id, struct k_clock *new_clock) { @@ -574,28 +522,17 @@ 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; } - 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; - 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; - if (new_clock->clock_getres && !new_clock->clock_getres64) - new_clock->clock_getres64 = default_clock_getres64; - posix_clocks[clock_id] = *new_clock; } EXPORT_SYMBOL_GPL(posix_timers_register_clock); @@ -642,8 +579,7 @@ 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]; } -- 1.7.9.5

8 years, 11 months

[PATCH v3 21/22] time/posix-cpu-timers:Convert to the 64bit methods for k_clock structure

by Baolin Wang

This patch changes to the new methods of k_clock structure with timespec64 type, converts the timespec/itimerspec type to timespec64/itimerspec64 type for the callback function in posix-cpu-timers.c file. Signed-off-by: Baolin Wang <baolin.wang(a)linaro.org> --- kernel/time/posix-cpu-timers.c | 83 +++++++++++++++++++++------------------- 1 file changed, 44 insertions(+), 39 deletions(-) diff --git a/kernel/time/posix-cpu-timers.c b/kernel/time/posix-cpu-timers.c index 0075da7..a4651cd 100644 --- a/kernel/time/posix-cpu-timers.c +++ b/kernel/time/posix-cpu-timers.c @@ -52,7 +52,7 @@ static int check_clock(const clockid_t which_clock) } static inline unsigned long long -timespec_to_sample(const clockid_t which_clock, const struct timespec *tp) +timespec64_to_sample(const clockid_t which_clock, const struct timespec64 *tp) { unsigned long long ret; @@ -60,19 +60,19 @@ timespec_to_sample(const clockid_t which_clock, const struct timespec *tp) if (CPUCLOCK_WHICH(which_clock) == CPUCLOCK_SCHED) { ret = (unsigned long long)tp->tv_sec * NSEC_PER_SEC + tp->tv_nsec; } else { - ret = cputime_to_expires(timespec_to_cputime(tp)); + ret = cputime_to_expires(timespec64_to_cputime(tp)); } return ret; } -static void sample_to_timespec(const clockid_t which_clock, +static void sample_to_timespec64(const clockid_t which_clock, unsigned long long expires, - struct timespec *tp) + struct timespec64 *tp) { if (CPUCLOCK_WHICH(which_clock) == CPUCLOCK_SCHED) - *tp = ns_to_timespec(expires); + *tp = ns_to_timespec64(expires); else - cputime_to_timespec((__force cputime_t)expires, tp); + cputime_to_timespec64((__force cputime_t)expires, tp); } /* @@ -141,7 +141,7 @@ static inline unsigned long long virt_ticks(struct task_struct *p) } static int -posix_cpu_clock_getres(const clockid_t which_clock, struct timespec *tp) +posix_cpu_clock_getres(const clockid_t which_clock, struct timespec64 *tp) { int error = check_clock(which_clock); if (!error) { @@ -160,7 +160,7 @@ posix_cpu_clock_getres(const clockid_t which_clock, struct timespec *tp) } static int -posix_cpu_clock_set(const clockid_t which_clock, const struct timespec *tp) +posix_cpu_clock_set(const clockid_t which_clock, const struct timespec64 *tp) { /* * You can never reset a CPU clock, but we check for other errors @@ -263,7 +263,7 @@ static int cpu_clock_sample_group(const clockid_t which_clock, static int posix_cpu_clock_get_task(struct task_struct *tsk, const clockid_t which_clock, - struct timespec *tp) + struct timespec64 *tp) { int err = -EINVAL; unsigned long long rtn; @@ -277,13 +277,14 @@ static int posix_cpu_clock_get_task(struct task_struct *tsk, } if (!err) - sample_to_timespec(which_clock, rtn, tp); + sample_to_timespec64(which_clock, rtn, tp); return err; } -static int posix_cpu_clock_get(const clockid_t which_clock, struct timespec *tp) +static int posix_cpu_clock_get(const clockid_t which_clock, + struct timespec64 *tp) { const pid_t pid = CPUCLOCK_PID(which_clock); int err = -EINVAL; @@ -598,7 +599,7 @@ static inline void posix_cpu_timer_kick_nohz(void) { } * and try again. (This happens when the timer is in the middle of firing.) */ static int posix_cpu_timer_set(struct k_itimer *timer, int timer_flags, - struct itimerspec *new, struct itimerspec *old) + struct itimerspec64 *new, struct itimerspec64 *old) { unsigned long flags; struct sighand_struct *sighand; @@ -608,7 +609,7 @@ static int posix_cpu_timer_set(struct k_itimer *timer, int timer_flags, WARN_ON_ONCE(p == NULL); - new_expires = timespec_to_sample(timer->it_clock, &new->it_value); + new_expires = timespec64_to_sample(timer->it_clock, &new->it_value); /* * Protect against sighand release/switch in exit/exec and p->cpu_timers @@ -669,7 +670,7 @@ static int posix_cpu_timer_set(struct k_itimer *timer, int timer_flags, bump_cpu_timer(timer, val); if (val < timer->it.cpu.expires) { old_expires = timer->it.cpu.expires - val; - sample_to_timespec(timer->it_clock, + sample_to_timespec64(timer->it_clock, old_expires, &old->it_value); } else { @@ -709,7 +710,7 @@ static int posix_cpu_timer_set(struct k_itimer *timer, int timer_flags, * Install the new reload setting, and * set up the signal and overrun bookkeeping. */ - timer->it.cpu.incr = timespec_to_sample(timer->it_clock, + timer->it.cpu.incr = timespec64_to_sample(timer->it_clock, &new->it_interval); /* @@ -734,7 +735,7 @@ static int posix_cpu_timer_set(struct k_itimer *timer, int timer_flags, ret = 0; out: if (old) { - sample_to_timespec(timer->it_clock, + sample_to_timespec64(timer->it_clock, old_incr, &old->it_interval); } if (!ret) @@ -742,7 +743,7 @@ static int posix_cpu_timer_set(struct k_itimer *timer, int timer_flags, return ret; } -static void posix_cpu_timer_get(struct k_itimer *timer, struct itimerspec *itp) +static void posix_cpu_timer_get(struct k_itimer *timer, struct itimerspec64 *itp) { unsigned long long now; struct task_struct *p = timer->it.cpu.task; @@ -752,7 +753,7 @@ static void posix_cpu_timer_get(struct k_itimer *timer, struct itimerspec *itp) /* * Easy part: convert the reload time. */ - sample_to_timespec(timer->it_clock, + sample_to_timespec64(timer->it_clock, timer->it.cpu.incr, &itp->it_interval); if (timer->it.cpu.expires == 0) { /* Timer not armed at all. */ @@ -782,7 +783,7 @@ static void posix_cpu_timer_get(struct k_itimer *timer, struct itimerspec *itp) * Call the timer disarmed, nothing else to do. */ timer->it.cpu.expires = 0; - sample_to_timespec(timer->it_clock, timer->it.cpu.expires, + sample_to_timespec64(timer->it_clock, timer->it.cpu.expires, &itp->it_value); } else { cpu_timer_sample_group(timer->it_clock, p, &now); @@ -791,7 +792,7 @@ static void posix_cpu_timer_get(struct k_itimer *timer, struct itimerspec *itp) } if (now < timer->it.cpu.expires) { - sample_to_timespec(timer->it_clock, + sample_to_timespec64(timer->it_clock, timer->it.cpu.expires - now, &itp->it_value); } else { @@ -1248,6 +1249,8 @@ static int do_cpu_nanosleep(const clockid_t which_clock, int flags, struct timespec *rqtp, struct itimerspec *it) { struct k_itimer timer; + struct timespec64 ts64; + struct itimerspec64 *it64; int error; /* @@ -1260,13 +1263,14 @@ static int do_cpu_nanosleep(const clockid_t which_clock, int flags, error = posix_cpu_timer_create(&timer); timer.it_process = current; if (!error) { - static struct itimerspec zero_it; + static struct itimerspec64 zero_it; memset(it, 0, sizeof *it); it->it_value = *rqtp; spin_lock_irq(&timer.it_lock); - error = posix_cpu_timer_set(&timer, flags, it, NULL); + *it64 = itimerspec_to_itimerspec64(it); + error = posix_cpu_timer_set(&timer, flags, it64, NULL); if (error) { spin_unlock_irq(&timer.it_lock); return error; @@ -1295,8 +1299,9 @@ static int do_cpu_nanosleep(const clockid_t which_clock, int flags, /* * We were interrupted by a signal. */ - sample_to_timespec(which_clock, timer.it.cpu.expires, rqtp); - error = posix_cpu_timer_set(&timer, 0, &zero_it, it); + sample_to_timespec64(which_clock, timer.it.cpu.expires, &ts64); + *rqtp = timespec64_to_timespec(ts64); + error = posix_cpu_timer_set(&timer, 0, &zero_it, it64); if (!error) { /* * Timer is now unarmed, deletion can not fail. @@ -1395,12 +1400,12 @@ static long posix_cpu_nsleep_restart(struct restart_block *restart_block) #define THREAD_CLOCK MAKE_THREAD_CPUCLOCK(0, CPUCLOCK_SCHED) static int process_cpu_clock_getres(const clockid_t which_clock, - struct timespec *tp) + struct timespec64 *tp) { return posix_cpu_clock_getres(PROCESS_CLOCK, tp); } static int process_cpu_clock_get(const clockid_t which_clock, - struct timespec *tp) + struct timespec64 *tp) { return posix_cpu_clock_get(PROCESS_CLOCK, tp); } @@ -1420,12 +1425,12 @@ static long process_cpu_nsleep_restart(struct restart_block *restart_block) return -EINVAL; } static int thread_cpu_clock_getres(const clockid_t which_clock, - struct timespec *tp) + struct timespec64 *tp) { return posix_cpu_clock_getres(THREAD_CLOCK, tp); } static int thread_cpu_clock_get(const clockid_t which_clock, - struct timespec *tp) + struct timespec64 *tp) { return posix_cpu_clock_get(THREAD_CLOCK, tp); } @@ -1436,37 +1441,37 @@ static int thread_cpu_timer_create(struct k_itimer *timer) } struct k_clock clock_posix_cpu = { - .clock_getres = posix_cpu_clock_getres, - .clock_set = posix_cpu_clock_set, - .clock_get = posix_cpu_clock_get, + .clock_getres64 = posix_cpu_clock_getres, + .clock_set64 = posix_cpu_clock_set, + .clock_get64 = posix_cpu_clock_get, .timer_create = posix_cpu_timer_create, .nsleep = posix_cpu_nsleep, .nsleep_restart = posix_cpu_nsleep_restart, - .timer_set = posix_cpu_timer_set, + .timer_set64 = posix_cpu_timer_set, .timer_del = posix_cpu_timer_del, - .timer_get = posix_cpu_timer_get, + .timer_get64 = posix_cpu_timer_get, }; static __init int init_posix_cpu_timers(void) { struct k_clock process = { - .clock_getres = process_cpu_clock_getres, - .clock_get = process_cpu_clock_get, + .clock_getres64 = process_cpu_clock_getres, + .clock_get64 = process_cpu_clock_get, .timer_create = process_cpu_timer_create, .nsleep = process_cpu_nsleep, .nsleep_restart = process_cpu_nsleep_restart, }; struct k_clock thread = { - .clock_getres = thread_cpu_clock_getres, - .clock_get = thread_cpu_clock_get, + .clock_getres64 = thread_cpu_clock_getres, + .clock_get64 = thread_cpu_clock_get, .timer_create = thread_cpu_timer_create, }; - struct timespec ts; + struct timespec64 ts; posix_timers_register_clock(CLOCK_PROCESS_CPUTIME_ID, &process); posix_timers_register_clock(CLOCK_THREAD_CPUTIME_ID, &thread); - cputime_to_timespec(cputime_one_jiffy, &ts); + cputime_to_timespec64(cputime_one_jiffy, &ts); onecputick = ts.tv_nsec; WARN_ON(ts.tv_sec != 0); -- 1.7.9.5

8 years, 11 months

[PATCH v3 20/22] cputime:Introduce the cputime_to_timespec64/timespec64_to_cputime function

by Baolin Wang

This patch introduces some functions for converting cputime to timespec64 and back, that repalce the timespec type with timespec64 type, as well as for arch/s390 and arch/powerpc architecture. And these new methods will replace the old cputime_to_timespec/timespec_to_cputime function to ready for 2038 issue. The cputime_to_timespec/timespec_to_cputime functions are moved to include/linux/cputime.h file for removing conveniently. Signed-off-by: Baolin Wang <baolin.wang(a)linaro.org> --- arch/powerpc/include/asm/cputime.h | 6 +++--- arch/s390/include/asm/cputime.h | 8 ++++---- include/asm-generic/cputime_jiffies.h | 10 +++++----- include/asm-generic/cputime_nsecs.h | 4 ++-- include/linux/cputime.h | 15 +++++++++++++++ 5 files changed, 29 insertions(+), 14 deletions(-) diff --git a/arch/powerpc/include/asm/cputime.h b/arch/powerpc/include/asm/cputime.h index e245255..5dda5c0 100644 --- a/arch/powerpc/include/asm/cputime.h +++ b/arch/powerpc/include/asm/cputime.h @@ -154,9 +154,9 @@ static inline cputime_t secs_to_cputime(const unsigned long sec) } /* - * Convert cputime <-> timespec + * Convert cputime <-> timespec64 */ -static inline void cputime_to_timespec(const cputime_t ct, struct timespec *p) +static inline void cputime_to_timespec64(const cputime_t ct, struct timespec64 *p) { u64 x = (__force u64) ct; unsigned int frac; @@ -168,7 +168,7 @@ static inline void cputime_to_timespec(const cputime_t ct, struct timespec *p) p->tv_nsec = x; } -static inline cputime_t timespec_to_cputime(const struct timespec *p) +static inline cputime_t timespec64_to_cputime(const struct timespec64 *p) { u64 ct; diff --git a/arch/s390/include/asm/cputime.h b/arch/s390/include/asm/cputime.h index b91e960..1266697 100644 --- a/arch/s390/include/asm/cputime.h +++ b/arch/s390/include/asm/cputime.h @@ -89,16 +89,16 @@ static inline cputime_t secs_to_cputime(const unsigned int s) } /* - * Convert cputime to timespec and back. + * Convert cputime to timespec64 and back. */ -static inline cputime_t timespec_to_cputime(const struct timespec *value) +static inline cputime_t timespec64_to_cputime(const struct timespec64 *value) { unsigned long long ret = value->tv_sec * CPUTIME_PER_SEC; return (__force cputime_t)(ret + __div(value->tv_nsec * CPUTIME_PER_USEC, NSEC_PER_USEC)); } -static inline void cputime_to_timespec(const cputime_t cputime, - struct timespec *value) +static inline void cputime_to_timespec64(const cputime_t cputime, + struct timespec64 *value) { unsigned long long __cputime = (__force unsigned long long) cputime; #ifndef CONFIG_64BIT diff --git a/include/asm-generic/cputime_jiffies.h b/include/asm-generic/cputime_jiffies.h index fe386fc..54e034c 100644 --- a/include/asm-generic/cputime_jiffies.h +++ b/include/asm-generic/cputime_jiffies.h @@ -44,12 +44,12 @@ typedef u64 __nocast cputime64_t; #define secs_to_cputime(sec) jiffies_to_cputime((sec) * HZ) /* - * Convert cputime to timespec and back. + * Convert cputime to timespec64 and back. */ -#define timespec_to_cputime(__val) \ - jiffies_to_cputime(timespec_to_jiffies(__val)) -#define cputime_to_timespec(__ct,__val) \ - jiffies_to_timespec(cputime_to_jiffies(__ct),__val) +#define timespec64_to_cputime(__val) \ + jiffies_to_cputime(timespec64_to_jiffies(__val)) +#define cputime_to_timespec64(__ct,__val) \ + jiffies_to_timespec64(cputime_to_jiffies(__ct),__val) /* * Convert cputime to timeval and back. diff --git a/include/asm-generic/cputime_nsecs.h b/include/asm-generic/cputime_nsecs.h index 0419485..65c875b 100644 --- a/include/asm-generic/cputime_nsecs.h +++ b/include/asm-generic/cputime_nsecs.h @@ -73,12 +73,12 @@ typedef u64 __nocast cputime64_t; /* * Convert cputime <-> timespec (nsec) */ -static inline cputime_t timespec_to_cputime(const struct timespec *val) +static inline cputime_t timespec64_to_cputime(const struct timespec64 *val) { u64 ret = val->tv_sec * NSEC_PER_SEC + val->tv_nsec; return (__force cputime_t) ret; } -static inline void cputime_to_timespec(const cputime_t ct, struct timespec *val) +static inline void cputime_to_timespec64(const cputime_t ct, struct timespec64 *val) { u32 rem; diff --git a/include/linux/cputime.h b/include/linux/cputime.h index f2eb2ee..f01896f 100644 --- a/include/linux/cputime.h +++ b/include/linux/cputime.h @@ -13,4 +13,19 @@ usecs_to_cputime((__nsecs) / NSEC_PER_USEC) #endif +static inline cputime_t timespec_to_cputime(const struct timespec *ts) +{ + struct timespec64 ts64 = timespec_to_timespec64(*ts); + return timespec64_to_cputime(&ts64); +} + +static inline void cputime_to_timespec(const cputime_t cputime, + struct timespec *value) +{ + struct timespec64 *ts64; + + *ts64 = timespec_to_timespec64(*value); + cputime_to_timespec64(cputime, ts64); +} + #endif /* __LINUX_CPUTIME_H */ -- 1.7.9.5

8 years, 11 months

[PATCH v3 19/22] time/time:Introduce the timespec64_to_jiffies/jiffies_to_timespec64 function

by Baolin Wang

This patch introduces the timespec64_to_jiffies() and jiffies_to_timespec64() functions, that implement the conversion between cputime and timespec64. And remove the old functions timespec64_to_jiffies()/jiffies_to_timespec64() to jiffies.h file. Signed-off-by: Baolin Wang <baolin.wang(a)linaro.org> --- include/linux/jiffies.h | 21 ++++++++++++++++++--- kernel/time/time.c | 12 ++++++------ 2 files changed, 24 insertions(+), 9 deletions(-) diff --git a/include/linux/jiffies.h b/include/linux/jiffies.h index c367cbd..16a30c1 100644 --- a/include/linux/jiffies.h +++ b/include/linux/jiffies.h @@ -290,9 +290,24 @@ static inline u64 jiffies_to_nsecs(const unsigned long j) extern unsigned long msecs_to_jiffies(const unsigned int m); extern unsigned long usecs_to_jiffies(const unsigned int u); -extern unsigned long timespec_to_jiffies(const struct timespec *value); -extern void jiffies_to_timespec(const unsigned long jiffies, - struct timespec *value); +extern unsigned long __timespec_to_jiffies(unsigned long sec, long nsec); +extern unsigned long timespec64_to_jiffies(const struct timespec64 *value); +extern void jiffies_to_timespec64(const unsigned long jiffies, + struct timespec64 *value); +static inline unsigned long timespec_to_jiffies(const struct timespec *value) +{ + return __timespec_to_jiffies(value->tv_sec, value->tv_nsec); +} + +static inline void jiffies_to_timespec(const unsigned long jiffies, + struct timespec *value) +{ + struct timespec64 *ts; + + *ts = timespec_to_timespec64(*value); + jiffies_to_timespec64(jiffies, ts); +} + extern unsigned long timeval_to_jiffies(const struct timeval *value); extern void jiffies_to_timeval(const unsigned long jiffies, struct timeval *value); diff --git a/kernel/time/time.c b/kernel/time/time.c index f43011b..3aba16f 100644 --- a/kernel/time/time.c +++ b/kernel/time/time.c @@ -571,7 +571,7 @@ EXPORT_SYMBOL(usecs_to_jiffies); * The >> (NSEC_JIFFIE_SC - SEC_JIFFIE_SC) converts the scaled nsec * value to a scaled second value. */ -static unsigned long +unsigned long __timespec_to_jiffies(unsigned long sec, long nsec) { nsec = nsec + TICK_NSEC - 1; @@ -585,17 +585,17 @@ __timespec_to_jiffies(unsigned long sec, long nsec) (NSEC_JIFFIE_SC - SEC_JIFFIE_SC))) >> SEC_JIFFIE_SC; } +EXPORT_SYMBOL(__timespec_to_jiffies); unsigned long -timespec_to_jiffies(const struct timespec *value) +timespec64_to_jiffies(const struct timespec64 *value) { return __timespec_to_jiffies(value->tv_sec, value->tv_nsec); } - -EXPORT_SYMBOL(timespec_to_jiffies); +EXPORT_SYMBOL(timespec64_to_jiffies); void -jiffies_to_timespec(const unsigned long jiffies, struct timespec *value) +jiffies_to_timespec64(const unsigned long jiffies, struct timespec64 *value) { /* * Convert jiffies to nanoseconds and separate with @@ -606,7 +606,7 @@ jiffies_to_timespec(const unsigned long jiffies, struct timespec *value) NSEC_PER_SEC, &rem); value->tv_nsec = rem; } -EXPORT_SYMBOL(jiffies_to_timespec); +EXPORT_SYMBOL(jiffies_to_timespec64); /* * We could use a similar algorithm to timespec_to_jiffies (with a -- 1.7.9.5

8 years, 11 months

[PATCH v3 18/22] time/posix-clock:Convert to the 64bit methods for k_clock and posix_clock_operations structure

by Baolin Wang

This patch converts the posix clock operations over to the new methods with timespec64/itimerspec64 type to making them ready for 2038, and it is based on the ptp patch series. And also changes to the 64bit methods for k_clock structure, that converts the timespec/itimerspec type to timespec64/itimerspec64 type. Signed-off-by: Baolin Wang <baolin.wang(a)linaro.org> --- drivers/ptp/ptp_clock.c | 26 ++++++++------------------ include/linux/posix-clock.h | 10 +++++----- kernel/time/posix-clock.c | 20 ++++++++++---------- 3 files changed, 23 insertions(+), 33 deletions(-) diff --git a/drivers/ptp/ptp_clock.c b/drivers/ptp/ptp_clock.c index bee8270..8c086e7 100644 --- a/drivers/ptp/ptp_clock.c +++ b/drivers/ptp/ptp_clock.c @@ -97,32 +97,24 @@ static s32 scaled_ppm_to_ppb(long ppm) /* posix clock implementation */ -static int ptp_clock_getres(struct posix_clock *pc, struct timespec *tp) +static int ptp_clock_getres(struct posix_clock *pc, struct timespec64 *tp) { tp->tv_sec = 0; tp->tv_nsec = 1; return 0; } -static int ptp_clock_settime(struct posix_clock *pc, const struct timespec *tp) +static int ptp_clock_settime(struct posix_clock *pc, + const struct timespec64 *tp) { struct ptp_clock *ptp = container_of(pc, struct ptp_clock, clock); - struct timespec64 ts = timespec_to_timespec64(*tp); - - return ptp->info->settime64(ptp->info, &ts); + return ptp->info->settime64(ptp->info, tp); } -static int ptp_clock_gettime(struct posix_clock *pc, struct timespec *tp) +static int ptp_clock_gettime(struct posix_clock *pc, struct timespec64 *tp) { struct ptp_clock *ptp = container_of(pc, struct ptp_clock, clock); - struct timespec64 ts; - int err; - - err = ptp->info->gettime64(ptp->info, &ts); - if (!err) - *tp = timespec64_to_timespec(ts); - - return err; + return ptp->info->gettime64(ptp->info, tp); } static int ptp_clock_adjtime(struct posix_clock *pc, struct timex *tx) @@ -134,8 +126,7 @@ static int ptp_clock_adjtime(struct posix_clock *pc, struct timex *tx) ops = ptp->info; if (tx->modes & ADJ_SETOFFSET) { - struct timespec ts; - ktime_t kt; + struct timespec64 ts; s64 delta; ts.tv_sec = tx->time.tv_sec; @@ -147,8 +138,7 @@ static int ptp_clock_adjtime(struct posix_clock *pc, struct timex *tx) if ((unsigned long) ts.tv_nsec >= NSEC_PER_SEC) return -EINVAL; - kt = timespec_to_ktime(ts); - delta = ktime_to_ns(kt); + delta = timespec64_to_ns(&ts); err = ops->adjtime(ops, delta); } else if (tx->modes & ADJ_FREQUENCY) { s32 ppb = scaled_ppm_to_ppb(tx->freq); diff --git a/include/linux/posix-clock.h b/include/linux/posix-clock.h index 34c4498..fd7e22c 100644 --- a/include/linux/posix-clock.h +++ b/include/linux/posix-clock.h @@ -59,23 +59,23 @@ struct posix_clock_operations { int (*clock_adjtime)(struct posix_clock *pc, struct timex *tx); - int (*clock_gettime)(struct posix_clock *pc, struct timespec *ts); + int (*clock_gettime)(struct posix_clock *pc, struct timespec64 *ts); - int (*clock_getres) (struct posix_clock *pc, struct timespec *ts); + int (*clock_getres)(struct posix_clock *pc, struct timespec64 *ts); int (*clock_settime)(struct posix_clock *pc, - const struct timespec *ts); + const struct timespec64 *ts); int (*timer_create) (struct posix_clock *pc, struct k_itimer *kit); int (*timer_delete) (struct posix_clock *pc, struct k_itimer *kit); void (*timer_gettime)(struct posix_clock *pc, - struct k_itimer *kit, struct itimerspec *tsp); + struct k_itimer *kit, struct itimerspec64 *tsp); int (*timer_settime)(struct posix_clock *pc, struct k_itimer *kit, int flags, - struct itimerspec *tsp, struct itimerspec *old); + struct itimerspec64 *tsp, struct itimerspec64 *old); /* * Optional character device methods: */ diff --git a/kernel/time/posix-clock.c b/kernel/time/posix-clock.c index ce033c7..e21e4c1 100644 --- a/kernel/time/posix-clock.c +++ b/kernel/time/posix-clock.c @@ -297,7 +297,7 @@ out: return err; } -static int pc_clock_gettime(clockid_t id, struct timespec *ts) +static int pc_clock_gettime(clockid_t id, struct timespec64 *ts) { struct posix_clock_desc cd; int err; @@ -316,7 +316,7 @@ static int pc_clock_gettime(clockid_t id, struct timespec *ts) return err; } -static int pc_clock_getres(clockid_t id, struct timespec *ts) +static int pc_clock_getres(clockid_t id, struct timespec64 *ts) { struct posix_clock_desc cd; int err; @@ -335,7 +335,7 @@ static int pc_clock_getres(clockid_t id, struct timespec *ts) return err; } -static int pc_clock_settime(clockid_t id, const struct timespec *ts) +static int pc_clock_settime(clockid_t id, const struct timespec64 *ts) { struct posix_clock_desc cd; int err; @@ -399,7 +399,7 @@ static int pc_timer_delete(struct k_itimer *kit) return err; } -static void pc_timer_gettime(struct k_itimer *kit, struct itimerspec *ts) +static void pc_timer_gettime(struct k_itimer *kit, struct itimerspec64 *ts) { clockid_t id = kit->it_clock; struct posix_clock_desc cd; @@ -414,7 +414,7 @@ static void pc_timer_gettime(struct k_itimer *kit, struct itimerspec *ts) } static int pc_timer_settime(struct k_itimer *kit, int flags, - struct itimerspec *ts, struct itimerspec *old) + struct itimerspec64 *ts, struct itimerspec64 *old) { clockid_t id = kit->it_clock; struct posix_clock_desc cd; @@ -435,12 +435,12 @@ static int pc_timer_settime(struct k_itimer *kit, int flags, } struct k_clock clock_posix_dynamic = { - .clock_getres = pc_clock_getres, - .clock_set = pc_clock_settime, - .clock_get = pc_clock_gettime, + .clock_getres64 = pc_clock_getres, + .clock_set64 = pc_clock_settime, + .clock_get64 = pc_clock_gettime, .clock_adj = pc_clock_adjtime, .timer_create = pc_timer_create, - .timer_set = pc_timer_settime, + .timer_set64 = pc_timer_settime, .timer_del = pc_timer_delete, - .timer_get = pc_timer_gettime, + .timer_get64 = pc_timer_gettime, }; -- 1.7.9.5

8 years, 11 months

[PATCH v3 17/22] time/alarmtimer:Convert to the new 64bit methods for k_clock structure

by Baolin Wang

This patch changes to the new methods with timespec64/itimerspec64 type of k_clock structure, and converts the timespec/itimerspec type to timespec64/itimerspec64 typein alarmtimer.c file. Signed-off-by: Baolin Wang <baolin.wang(a)linaro.org> --- kernel/time/alarmtimer.c | 43 ++++++++++++++++++++++--------------------- 1 file changed, 22 insertions(+), 21 deletions(-) diff --git a/kernel/time/alarmtimer.c b/kernel/time/alarmtimer.c index 1b001ed..68186e1 100644 --- a/kernel/time/alarmtimer.c +++ b/kernel/time/alarmtimer.c @@ -489,35 +489,36 @@ static enum alarmtimer_restart alarm_handle_timer(struct alarm *alarm, /** * alarm_clock_getres - posix getres interface * @which_clock: clockid - * @tp: timespec to fill + * @tp: timespec64 to fill * * Returns the granularity of underlying alarm base clock */ -static int alarm_clock_getres(const clockid_t which_clock, struct timespec *tp) +static int alarm_clock_getres(const clockid_t which_clock, + struct timespec64 *tp) { clockid_t baseid = alarm_bases[clock2alarm(which_clock)].base_clockid; if (!alarmtimer_get_rtcdev()) return -EINVAL; - return hrtimer_get_res(baseid, tp); + return hrtimer_get_res64(baseid, tp); } /** * alarm_clock_get - posix clock_get interface * @which_clock: clockid - * @tp: timespec to fill. + * @tp: timespec64 to fill. * * Provides the underlying alarm base time. */ -static int alarm_clock_get(clockid_t which_clock, struct timespec *tp) +static int alarm_clock_get(clockid_t which_clock, struct timespec64 *tp) { struct alarm_base *base = &alarm_bases[clock2alarm(which_clock)]; if (!alarmtimer_get_rtcdev()) return -EINVAL; - *tp = ktime_to_timespec(base->gettime()); + *tp = ktime_to_timespec64(base->gettime()); return 0; } @@ -547,24 +548,24 @@ static int alarm_timer_create(struct k_itimer *new_timer) /** * alarm_timer_get - posix timer_get interface * @new_timer: k_itimer pointer - * @cur_setting: itimerspec data to fill + * @cur_setting: itimerspec64 data to fill * * Copies out the current itimerspec data */ static void alarm_timer_get(struct k_itimer *timr, - struct itimerspec *cur_setting) + struct itimerspec64 *cur_setting) { ktime_t relative_expiry_time = alarm_expires_remaining(&(timr->it.alarm.alarmtimer)); if (ktime_to_ns(relative_expiry_time) > 0) { - cur_setting->it_value = ktime_to_timespec(relative_expiry_time); + cur_setting->it_value = ktime_to_timespec64(relative_expiry_time); } else { cur_setting->it_value.tv_sec = 0; cur_setting->it_value.tv_nsec = 0; } - cur_setting->it_interval = ktime_to_timespec(timr->it.alarm.interval); + cur_setting->it_interval = ktime_to_timespec64(timr->it.alarm.interval); } /** @@ -588,14 +589,14 @@ static int alarm_timer_del(struct k_itimer *timr) * alarm_timer_set - posix timer_set interface * @timr: k_itimer pointer to be deleted * @flags: timer flags - * @new_setting: itimerspec to be used - * @old_setting: itimerspec being replaced + * @new_setting: itimerspec64 to be used + * @old_setting: itimerspec64 being replaced * * Sets the timer to new_setting, and starts the timer. */ static int alarm_timer_set(struct k_itimer *timr, int flags, - struct itimerspec *new_setting, - struct itimerspec *old_setting) + struct itimerspec64 *new_setting, + struct itimerspec64 *old_setting) { ktime_t exp; @@ -613,8 +614,8 @@ static int alarm_timer_set(struct k_itimer *timr, int flags, return TIMER_RETRY; /* start the timer */ - timr->it.alarm.interval = timespec_to_ktime(new_setting->it_interval); - exp = timespec_to_ktime(new_setting->it_value); + timr->it.alarm.interval = timespec64_to_ktime(new_setting->it_interval); + exp = timespec64_to_ktime(new_setting->it_value); /* Convert (if necessary) to absolute time */ if (flags != TIMER_ABSTIME) { ktime_t now; @@ -670,7 +671,7 @@ static int alarmtimer_do_nsleep(struct alarm *alarm, ktime_t absexp) /** - * update_rmtp - Update remaining timespec value + * update_rmtp - Update remaining timespec64 value * @exp: expiration time * @type: timer type * @rmtp: user pointer to remaining timepsec value @@ -824,12 +825,12 @@ static int __init alarmtimer_init(void) int error = 0; int i; struct k_clock alarm_clock = { - .clock_getres = alarm_clock_getres, - .clock_get = alarm_clock_get, + .clock_getres64 = alarm_clock_getres, + .clock_get64 = alarm_clock_get, .timer_create = alarm_timer_create, - .timer_set = alarm_timer_set, + .timer_set64 = alarm_timer_set, .timer_del = alarm_timer_del, - .timer_get = alarm_timer_get, + .timer_get64 = alarm_timer_get, .nsleep = alarm_timer_nsleep, }; -- 1.7.9.5

8 years, 11 months

[PATCH v3 16/22] char/mmtimer:Convert to the 64bit methods for k_clock callback function

by Baolin Wang

This patch converts to the 64bit methods for k_clock callback function, that converts the timespec type to timespec64 type and converts the itimerspec type to itimerspec64 type. Signed-off-by: Baolin Wang <baolin.wang(a)linaro.org> --- drivers/char/mmtimer.c | 36 +++++++++++++++++------------------- 1 file changed, 17 insertions(+), 19 deletions(-) diff --git a/drivers/char/mmtimer.c b/drivers/char/mmtimer.c index 3d6c067..213d0bb 100644 --- a/drivers/char/mmtimer.c +++ b/drivers/char/mmtimer.c @@ -478,18 +478,18 @@ static int sgi_clock_period; static struct timespec sgi_clock_offset; static int sgi_clock_period; -static int sgi_clock_get(clockid_t clockid, struct timespec *tp) +static int sgi_clock_get(clockid_t clockid, struct timespec64 *tp) { u64 nsec; nsec = rtc_time() * sgi_clock_period + sgi_clock_offset.tv_nsec; - *tp = ns_to_timespec(nsec); + *tp = ns_to_timespec64(nsec); tp->tv_sec += sgi_clock_offset.tv_sec; return 0; }; -static int sgi_clock_set(const clockid_t clockid, const struct timespec *tp) +static int sgi_clock_set(const clockid_t clockid, const struct timespec64 *tp) { u64 nsec; @@ -657,7 +657,7 @@ static int sgi_timer_del(struct k_itimer *timr) } /* Assumption: it_lock is already held with irq's disabled */ -static void sgi_timer_get(struct k_itimer *timr, struct itimerspec *cur_setting) +static void sgi_timer_get(struct k_itimer *timr, struct itimerspec64 *cur_setting) { if (timr->it.mmtimer.clock == TIMER_OFF) { @@ -668,14 +668,14 @@ static void sgi_timer_get(struct k_itimer *timr, struct itimerspec *cur_setting) return; } - cur_setting->it_interval = ns_to_timespec(timr->it.mmtimer.incr * sgi_clock_period); - cur_setting->it_value = ns_to_timespec((timr->it.mmtimer.expires - rtc_time()) * sgi_clock_period); + cur_setting->it_interval = ns_to_timespec64(timr->it.mmtimer.incr * sgi_clock_period); + cur_setting->it_value = ns_to_timespec64((timr->it.mmtimer.expires - rtc_time()) * sgi_clock_period); } static int sgi_timer_set(struct k_itimer *timr, int flags, - struct itimerspec * new_setting, - struct itimerspec * old_setting) + struct itimerspec64 *new_setting, + struct itimerspec64 *old_setting) { unsigned long when, period, irqflags; int err = 0; @@ -687,8 +687,8 @@ static int sgi_timer_set(struct k_itimer *timr, int flags, sgi_timer_get(timr, old_setting); sgi_timer_del(timr); - when = timespec_to_ns(&new_setting->it_value); - period = timespec_to_ns(&new_setting->it_interval); + when = timespec64_to_ns(&new_setting->it_value); + period = timespec64_to_ns(&new_setting->it_interval); if (when == 0) /* Clear timer */ @@ -699,11 +699,9 @@ static int sgi_timer_set(struct k_itimer *timr, int flags, return -ENOMEM; if (flags & TIMER_ABSTIME) { - struct timespec n; unsigned long now; - getnstimeofday(&n); - now = timespec_to_ns(&n); + now = ktime_get_real_ns(); if (when > now) when -= now; else @@ -765,7 +763,7 @@ static int sgi_timer_set(struct k_itimer *timr, int flags, return err; } -static int sgi_clock_getres(const clockid_t which_clock, struct timespec *tp) +static int sgi_clock_getres(const clockid_t which_clock, struct timespec64 *tp) { tp->tv_sec = 0; tp->tv_nsec = sgi_clock_period; @@ -773,13 +771,13 @@ static int sgi_clock_getres(const clockid_t which_clock, struct timespec *tp) } static struct k_clock sgi_clock = { - .clock_set = sgi_clock_set, - .clock_get = sgi_clock_get, - .clock_getres = sgi_clock_getres, + .clock_set64 = sgi_clock_set, + .clock_get64 = sgi_clock_get, + .clock_getres64 = sgi_clock_getres, .timer_create = sgi_timer_create, - .timer_set = sgi_timer_set, + .timer_set64 = sgi_timer_set, .timer_del = sgi_timer_del, - .timer_get = sgi_timer_get + .timer_get64 = sgi_timer_get }; /** -- 1.7.9.5

8 years, 11 months

[PATCH v3 13/22] 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. Convert to the 64bit method with timespec64 type for the clock_getres syscall function, and change the clock_getres syscall implementation according the the CONFIG_64BIT macro. 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, 29 insertions(+), 7 deletions(-) diff --git a/include/linux/posix-timers.h b/include/linux/posix-timers.h index c08a536..9a5a211 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 456c588..b93b637 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -555,6 +555,16 @@ static int default_clock_get64(const clockid_t which_clock, return 0; } +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; + + kc->clock_getres(which_clock, &tp); + return 0; +} + void posix_timers_register_clock(const clockid_t clock_id, struct k_clock *new_clock) { @@ -569,8 +579,8 @@ 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; } @@ -583,6 +593,8 @@ 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; } @@ -630,7 +642,8 @@ 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]; } @@ -1182,23 +1195,31 @@ 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

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Y2038 May 2015