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authorLinus Torvalds <torvalds@linux-foundation.org>2012-01-06 16:57:44 -0500
committerLinus Torvalds <torvalds@linux-foundation.org>2012-01-06 16:57:44 -0500
commit376613e81ddc68f545fd5c87ffc3ad222b7abe5f (patch)
treee1cb1cd43d05f57e4584dd5f9ce3eb965d0ddff1 /arch/x86/kernel
parent0db49b72bce26341274b74fd968501489a361ae3 (diff)
parent0518469d0a32be1e6dd8850ff274d52d72cdb52d (diff)
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
* 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86, tsc: Skip TSC synchronization checks for tsc=reliable clocksource: Convert tcb_clksrc to use clocksource_register_hz/khz clocksource: cris: Convert to clocksource_register_khz clocksource: xtensa: Convert to clocksource_register_hz/khz clocksource: um: Convert to clocksource_register_hz/khz clocksource: parisc: Convert to clocksource_register_hz/khz clocksource: m86k: Convert to clocksource_register_hz/khz time: x86: Replace LATCH with PIT_LATCH in i8253 clocksource driver time: x86: Remove CLOCK_TICK_RATE from acpi_pm clocksource driver time: x86: Remove CLOCK_TICK_RATE from mach_timer.h time: x86: Remove CLOCK_TICK_RATE from tsc code time: Fix spelling mistakes in new comments time: fix bogus comment in timekeeping_get_ns_raw
Diffstat (limited to 'arch/x86/kernel')
-rw-r--r--arch/x86/kernel/tsc.c6
-rw-r--r--arch/x86/kernel/tsc_sync.c4
2 files changed, 5 insertions, 5 deletions
diff --git a/arch/x86/kernel/tsc.c b/arch/x86/kernel/tsc.c
index db483369f10..2c9cf0fd78f 100644
--- a/arch/x86/kernel/tsc.c
+++ b/arch/x86/kernel/tsc.c
@@ -35,7 +35,7 @@ static int __read_mostly tsc_unstable;
35 erroneous rdtsc usage on !cpu_has_tsc processors */ 35 erroneous rdtsc usage on !cpu_has_tsc processors */
36static int __read_mostly tsc_disabled = -1; 36static int __read_mostly tsc_disabled = -1;
37 37
38static int tsc_clocksource_reliable; 38int tsc_clocksource_reliable;
39/* 39/*
40 * Scheduler clock - returns current time in nanosec units. 40 * Scheduler clock - returns current time in nanosec units.
41 */ 41 */
@@ -178,11 +178,11 @@ static unsigned long calc_pmtimer_ref(u64 deltatsc, u64 pm1, u64 pm2)
178} 178}
179 179
180#define CAL_MS 10 180#define CAL_MS 10
181#define CAL_LATCH (CLOCK_TICK_RATE / (1000 / CAL_MS)) 181#define CAL_LATCH (PIT_TICK_RATE / (1000 / CAL_MS))
182#define CAL_PIT_LOOPS 1000 182#define CAL_PIT_LOOPS 1000
183 183
184#define CAL2_MS 50 184#define CAL2_MS 50
185#define CAL2_LATCH (CLOCK_TICK_RATE / (1000 / CAL2_MS)) 185#define CAL2_LATCH (PIT_TICK_RATE / (1000 / CAL2_MS))
186#define CAL2_PIT_LOOPS 5000 186#define CAL2_PIT_LOOPS 5000
187 187
188 188
diff --git a/arch/x86/kernel/tsc_sync.c b/arch/x86/kernel/tsc_sync.c
index 0aa5fed8b9e..9eba29b46cb 100644
--- a/arch/x86/kernel/tsc_sync.c
+++ b/arch/x86/kernel/tsc_sync.c
@@ -113,7 +113,7 @@ void __cpuinit check_tsc_sync_source(int cpu)
113 if (unsynchronized_tsc()) 113 if (unsynchronized_tsc())
114 return; 114 return;
115 115
116 if (boot_cpu_has(X86_FEATURE_TSC_RELIABLE)) { 116 if (tsc_clocksource_reliable) {
117 if (cpu == (nr_cpu_ids-1) || system_state != SYSTEM_BOOTING) 117 if (cpu == (nr_cpu_ids-1) || system_state != SYSTEM_BOOTING)
118 pr_info( 118 pr_info(
119 "Skipped synchronization checks as TSC is reliable.\n"); 119 "Skipped synchronization checks as TSC is reliable.\n");
@@ -172,7 +172,7 @@ void __cpuinit check_tsc_sync_target(void)
172{ 172{
173 int cpus = 2; 173 int cpus = 2;
174 174
175 if (unsynchronized_tsc() || boot_cpu_has(X86_FEATURE_TSC_RELIABLE)) 175 if (unsynchronized_tsc() || tsc_clocksource_reliable)
176 return; 176 return;
177 177
178 /* 178 /*