diff options
| author | jhb <jhb@FreeBSD.org> | 2013-01-28 19:38:13 +0000 |
|---|---|---|
| committer | jhb <jhb@FreeBSD.org> | 2013-01-28 19:38:13 +0000 |
| commit | 5df972afb615beef2123a19aeca58e473e3d4e95 (patch) | |
| tree | 380f661c837f03bdedc0e10252427ed4cde7ed7d /sys/kern/kern_clock.c | |
| parent | 7756bef786978bd5d07c05b55bc8428454d6837d (diff) | |
| download | FreeBSD-src-5df972afb615beef2123a19aeca58e473e3d4e95.zip FreeBSD-src-5df972afb615beef2123a19aeca58e473e3d4e95.tar.gz | |
Mark 'ticks', 'time_second', and 'time_uptime' as volatile to prevent the
compiler from caching their values in tight loops.
Reviewed by: bde
MFC after: 1 week
Diffstat (limited to 'sys/kern/kern_clock.c')
| -rw-r--r-- | sys/kern/kern_clock.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/sys/kern/kern_clock.c b/sys/kern/kern_clock.c index 5e10200..9d62c58 100644 --- a/sys/kern/kern_clock.c +++ b/sys/kern/kern_clock.c @@ -382,7 +382,7 @@ static void watchdog_config(void *, u_int, int *); int stathz; int profhz; int profprocs; -int ticks; +volatile int ticks; int psratio; static DPCPU_DEFINE(int, pcputicks); /* Per-CPU version of ticks. */ @@ -469,7 +469,7 @@ void hardclock(int usermode, uintfptr_t pc) { - atomic_add_int((volatile int *)&ticks, 1); + atomic_add_int(&ticks, 1); hardclock_cpu(usermode); tc_ticktock(1); cpu_tick_calibration(); |
