Merge tag 'v3.14.25' into backport/v3.14.24-ltsi-rc1+v3.14.25/snapshot-merge.wip

[platform/adaptation/renesas_rcar/renesas_kernel.git] / arch / x86 / kernel / tsc.c

diff --git a/arch/x86/kernel/tsc.c b/arch/x86/kernel/tsc.c
index acb3b60..3594fea 100644 (file)
--- a/arch/x86/kernel/tsc.c
+++ b/arch/x86/kernel/tsc.c
@@ -653,13 +653,10 @@ unsigned long native_calibrate_tsc(void)
 
        /* Calibrate TSC using MSR for Intel Atom SoCs */
        local_irq_save(flags);
-       i = try_msr_calibrate_tsc(&fast_calibrate);
+       fast_calibrate = try_msr_calibrate_tsc();
        local_irq_restore(flags);
-       if (i >= 0) {
-               if (i == 0)
-                       pr_warn("Fast TSC calibration using MSR failed\n");
+       if (fast_calibrate)
                return fast_calibrate;
-       }
 
        local_irq_save(flags);
        fast_calibrate = quick_pit_calibrate();
@@ -917,16 +914,15 @@ static int time_cpufreq_notifier(struct notifier_block *nb, unsigned long val,
                tsc_khz_ref = tsc_khz;
        }
        if ((val == CPUFREQ_PRECHANGE  && freq->old < freq->new) ||
-                       (val == CPUFREQ_POSTCHANGE && freq->old > freq->new) ||
-                       (val == CPUFREQ_RESUMECHANGE)) {
+                       (val == CPUFREQ_POSTCHANGE && freq->old > freq->new)) {
                *lpj = cpufreq_scale(loops_per_jiffy_ref, ref_freq, freq->new);
 
                tsc_khz = cpufreq_scale(tsc_khz_ref, ref_freq, freq->new);
                if (!(freq->flags & CPUFREQ_CONST_LOOPS))
                        mark_tsc_unstable("cpufreq changes");
-       }
 
-       set_cyc2ns_scale(tsc_khz, freq->cpu);
+               set_cyc2ns_scale(tsc_khz, freq->cpu);
+       }
 
        return 0;
 }
@@ -1176,14 +1172,17 @@ void __init tsc_init(void)
 
        x86_init.timers.tsc_pre_init();
 
-       if (!cpu_has_tsc)
+       if (!cpu_has_tsc) {
+               setup_clear_cpu_cap(X86_FEATURE_TSC_DEADLINE_TIMER);
                return;
+       }
 
        tsc_khz = x86_platform.calibrate_tsc();
        cpu_khz = tsc_khz;
 
        if (!tsc_khz) {
                mark_tsc_unstable("could not calculate TSC khz");
+               setup_clear_cpu_cap(X86_FEATURE_TSC_DEADLINE_TIMER);
                return;
        }