From: Len Brown <len.br...@intel.com>
Remove the irqoff/irqon around MSR-based TSC enumeration,
as it is not necessary.
Also rename: try_msr_calibrate_tsc() to cpu_khz_from_msr(),
as that better describes what the routine does.
Signed-off-by: Len Brown <len.br...@intel.com>
Signed-off-by: Yong, Jonathan <jonathan.y...@intel.com>
---
arch/x86/include/asm/tsc.h | 3 +--
arch/x86/kernel/tsc.c | 5 +----
arch/x86/kernel/tsc_msr.c | 2 +-
3 files changed, 3 insertions(+), 7 deletions(-)
diff --git a/arch/x86/include/asm/tsc.h b/arch/x86/include/asm/tsc.h
index d0f9013..5c61c244 100644
--- a/arch/x86/include/asm/tsc.h
+++ b/arch/x86/include/asm/tsc.h
@@ -67,7 +67,6 @@ extern int notsc_setup(char *);
extern void tsc_save_sched_clock_state(void);
extern void tsc_restore_sched_clock_state(void);
-/* MSR based TSC calibration for Intel Atom SoC platforms */
-unsigned long try_msr_calibrate_tsc(void);
+unsigned long cpu_khz_from_msr(void);
#endif /* _ASM_X86_TSC_H */
diff --git a/arch/x86/kernel/tsc.c b/arch/x86/kernel/tsc.c
index fc39d74..7b07f7e 100644
--- a/arch/x86/kernel/tsc.c
+++ b/arch/x86/kernel/tsc.c
@@ -656,10 +656,7 @@ unsigned long native_calibrate_tsc(void)
unsigned long flags, latch, ms, fast_calibrate;
int hpet = is_hpet_enabled(), i, loopmin;
- /* Calibrate TSC using MSR for Intel Atom SoCs */
- local_irq_save(flags);
- fast_calibrate = try_msr_calibrate_tsc();
- local_irq_restore(flags);
+ fast_calibrate = cpu_khz_from_msr();
if (fast_calibrate)
return fast_calibrate;
diff --git a/arch/x86/kernel/tsc_msr.c b/arch/x86/kernel/tsc_msr.c
index 65b3d8cb..0fe720d 100644
--- a/arch/x86/kernel/tsc_msr.c
+++ b/arch/x86/kernel/tsc_msr.c
@@ -68,7 +68,7 @@ static int match_cpu(u8 family, u8 model)
* Set global "lapic_timer_frequency" to bus_clock_cycles/jiffy
* Return processor base frequency in KHz, or 0 on failure.
*/
-unsigned long try_msr_calibrate_tsc(void)
+unsigned long cpu_khz_from_msr(void)
{
u32 lo, hi, ratio, freq_id, freq;
unsigned long res;
--
2.7.3
--
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