diff options
Diffstat (limited to 'kernel/time')
| -rw-r--r-- | kernel/time/clocksource.c | 12 | ||||
| -rw-r--r-- | kernel/time/timekeeping.c | 26 | ||||
| -rw-r--r-- | kernel/time/timekeeping_internal.h | 6 |
3 files changed, 27 insertions, 17 deletions
diff --git a/kernel/time/clocksource.c b/kernel/time/clocksource.c index ba3e502c955a..2e949cc9c9f1 100644 --- a/kernel/time/clocksource.c +++ b/kernel/time/clocksource.c @@ -32,6 +32,7 @@ #include <linux/kthread.h> #include "tick-internal.h" +#include "timekeeping_internal.h" void timecounter_init(struct timecounter *tc, const struct cyclecounter *cc, @@ -249,7 +250,7 @@ void clocksource_mark_unstable(struct clocksource *cs) static void clocksource_watchdog(unsigned long data) { struct clocksource *cs; - cycle_t csnow, wdnow; + cycle_t csnow, wdnow, delta; int64_t wd_nsec, cs_nsec; int next_cpu, reset_pending; @@ -282,11 +283,12 @@ static void clocksource_watchdog(unsigned long data) continue; } - wd_nsec = clocksource_cyc2ns((wdnow - cs->wd_last) & watchdog->mask, - watchdog->mult, watchdog->shift); + delta = clocksource_delta(wdnow, cs->wd_last, watchdog->mask); + wd_nsec = clocksource_cyc2ns(delta, watchdog->mult, + watchdog->shift); - cs_nsec = clocksource_cyc2ns((csnow - cs->cs_last) & - cs->mask, cs->mult, cs->shift); + delta = clocksource_delta(csnow, cs->cs_last, cs->mask); + cs_nsec = clocksource_cyc2ns(delta, cs->mult, cs->shift); cs->cs_last = csnow; cs->wd_last = wdnow; diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c index af8051f4420d..531805013786 100644 --- a/kernel/time/timekeeping.c +++ b/kernel/time/timekeeping.c @@ -173,7 +173,7 @@ static inline u32 arch_gettimeoffset(void) { return 0; } static inline s64 timekeeping_get_ns(struct timekeeper *tk) { - cycle_t cycle_now, cycle_delta; + cycle_t cycle_now, delta; struct clocksource *clock; s64 nsec; @@ -182,9 +182,9 @@ static inline s64 timekeeping_get_ns(struct timekeeper *tk) cycle_now = clock->read(clock); /* calculate the delta since the last update_wall_time: */ - cycle_delta = (cycle_now - clock->cycle_last) & clock->mask; + delta = clocksource_delta(cycle_now, clock->cycle_last, clock->mask); - nsec = cycle_delta * tk->mult + tk->xtime_nsec; + nsec = delta * tk->mult + tk->xtime_nsec; nsec >>= tk->shift; /* If arch requires, add in get_arch_timeoffset() */ @@ -193,7 +193,7 @@ static inline s64 timekeeping_get_ns(struct timekeeper *tk) static inline s64 timekeeping_get_ns_raw(struct timekeeper *tk) { - cycle_t cycle_now, cycle_delta; + cycle_t cycle_now, delta; struct clocksource *clock; s64 nsec; @@ -202,10 +202,10 @@ static inline s64 timekeeping_get_ns_raw(struct timekeeper *tk) cycle_now = clock->read(clock); /* calculate the delta since the last update_wall_time: */ - cycle_delta = (cycle_now - clock->cycle_last) & clock->mask; + delta = clocksource_delta(cycle_now, clock->cycle_last, clock->mask); /* convert delta to nanoseconds. */ - nsec = clocksource_cyc2ns(cycle_delta, clock->mult, clock->shift); + nsec = clocksource_cyc2ns(delta, clock->mult, clock->shift); /* If arch requires, add in get_arch_timeoffset() */ return nsec + arch_gettimeoffset(); @@ -336,23 +336,23 @@ static void timekeeping_update(struct timekeeper *tk, unsigned int action) */ static void timekeeping_forward_now(struct timekeeper *tk) { - cycle_t cycle_now, cycle_delta; + cycle_t cycle_now, delta; struct clocksource *clock; s64 nsec; clock = tk->clock; cycle_now = clock->read(clock); - cycle_delta = (cycle_now - clock->cycle_last) & clock->mask; + delta = clocksource_delta(cycle_now, clock->cycle_last, clock->mask); tk->cycle_last = clock->cycle_last = cycle_now; - tk->xtime_nsec += cycle_delta * tk->mult; + tk->xtime_nsec += delta * tk->mult; /* If arch requires, add in get_arch_timeoffset() */ tk->xtime_nsec += (u64)arch_gettimeoffset() << tk->shift; tk_normalize_xtime(tk); - nsec = clocksource_cyc2ns(cycle_delta, clock->mult, clock->shift); + nsec = clocksource_cyc2ns(delta, clock->mult, clock->shift); timespec64_add_ns(&tk->raw_time, nsec); } @@ -1026,7 +1026,8 @@ static void timekeeping_resume(void) u32 shift = clock->shift; s64 nsec = 0; - cycle_delta = (cycle_now - clock->cycle_last) & clock->mask; + cycle_delta = clocksource_delta(cycle_now, clock->cycle_last, + clock->mask); /* * "cycle_delta * mutl" may cause 64 bits overflow, if the @@ -1432,7 +1433,8 @@ void update_wall_time(void) #ifdef CONFIG_ARCH_USES_GETTIMEOFFSET offset = real_tk->cycle_interval; #else - offset = (clock->read(clock) - clock->cycle_last) & clock->mask; + offset = clocksource_delta(clock->read(clock), clock->cycle_last, + clock->mask); #endif /* Check if there's really nothing to do */ diff --git a/kernel/time/timekeeping_internal.h b/kernel/time/timekeeping_internal.h index e3d28ad236f9..05dfa6b25dc4 100644 --- a/kernel/time/timekeeping_internal.h +++ b/kernel/time/timekeeping_internal.h @@ -3,6 +3,7 @@ /* * timekeeping debug functions */ +#include <linux/clocksource.h> #include <linux/time.h> #ifdef CONFIG_DEBUG_FS @@ -11,4 +12,9 @@ extern void tk_debug_account_sleep_time(struct timespec64 *t); #define tk_debug_account_sleep_time(x) #endif +static inline cycle_t clocksource_delta(cycle_t now, cycle_t last, cycle_t mask) +{ + return (now - last) & mask; +} + #endif /* _TIMEKEEPING_INTERNAL_H */ |