From 6d63de8dbcda98511206897562ecfcdacf18f523 Mon Sep 17 00:00:00 2001 From: Andi Kleen Date: Wed, 30 Jan 2008 13:32:39 +0100 Subject: x86: remove get_cycles_sync rdtsc is now speculation-safe, so no need for the sync variants of the APIs. [ mingo@elte.hu: removed the nsec_barrier() complication. ] Signed-off-by: Andi Kleen Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner --- arch/x86/kernel/time_64.c | 2 +- arch/x86/kernel/tsc_64.c | 12 ++++++------ arch/x86/kernel/tsc_sync.c | 4 ++-- 3 files changed, 9 insertions(+), 9 deletions(-) (limited to 'arch/x86') diff --git a/arch/x86/kernel/time_64.c b/arch/x86/kernel/time_64.c index 91d4d495904..61b17f5ec86 100644 --- a/arch/x86/kernel/time_64.c +++ b/arch/x86/kernel/time_64.c @@ -83,7 +83,7 @@ unsigned long __init native_calculate_cpu_khz(void) rdtscl(tsc_start); do { rdmsrl(MSR_K7_PERFCTR0 + i, pmc_now); - tsc_now = get_cycles_sync(); + tsc_now = get_cycles(); } while ((tsc_now - tsc_start) < TICK_COUNT); local_irq_restore(flags); diff --git a/arch/x86/kernel/tsc_64.c b/arch/x86/kernel/tsc_64.c index 3723401c459..2cc55b726c2 100644 --- a/arch/x86/kernel/tsc_64.c +++ b/arch/x86/kernel/tsc_64.c @@ -181,12 +181,12 @@ static unsigned long __init tsc_read_refs(unsigned long *pm, int i; for (i = 0; i < MAX_RETRIES; i++) { - t1 = get_cycles_sync(); + t1 = get_cycles(); if (hpet) *hpet = hpet_readl(HPET_COUNTER) & 0xFFFFFFFF; else *pm = acpi_pm_read_early(); - t2 = get_cycles_sync(); + t2 = get_cycles(); if ((t2 - t1) < SMI_TRESHOLD) return t2; } @@ -210,9 +210,9 @@ void __init tsc_calibrate(void) outb(0xb0, 0x43); outb((CLOCK_TICK_RATE / (1000 / 50)) & 0xff, 0x42); outb((CLOCK_TICK_RATE / (1000 / 50)) >> 8, 0x42); - tr1 = get_cycles_sync(); + tr1 = get_cycles(); while ((inb(0x61) & 0x20) == 0); - tr2 = get_cycles_sync(); + tr2 = get_cycles(); tsc2 = tsc_read_refs(&pm2, hpet ? &hpet2 : NULL); @@ -300,13 +300,13 @@ __setup("notsc", notsc_setup); /* clock source code: */ static cycle_t read_tsc(void) { - cycle_t ret = (cycle_t)get_cycles_sync(); + cycle_t ret = (cycle_t)get_cycles(); return ret; } static cycle_t __vsyscall_fn vread_tsc(void) { - cycle_t ret = (cycle_t)vget_cycles_sync(); + cycle_t ret = (cycle_t)vget_cycles(); return ret; } diff --git a/arch/x86/kernel/tsc_sync.c b/arch/x86/kernel/tsc_sync.c index 05d8f25de6a..ace340524c0 100644 --- a/arch/x86/kernel/tsc_sync.c +++ b/arch/x86/kernel/tsc_sync.c @@ -46,7 +46,7 @@ static __cpuinit void check_tsc_warp(void) cycles_t start, now, prev, end; int i; - start = get_cycles_sync(); + start = get_cycles(); /* * The measurement runs for 20 msecs: */ @@ -61,7 +61,7 @@ static __cpuinit void check_tsc_warp(void) */ __raw_spin_lock(&sync_lock); prev = last_tsc; - now = get_cycles_sync(); + now = get_cycles(); last_tsc = now; __raw_spin_unlock(&sync_lock); -- cgit v1.2.3