diff options
| author | Anson Huang <b20788@freescale.com> | 2012-06-04 20:50:53 +0800 |
|---|---|---|
| committer | Eric Nelson <eric.nelson@boundarydevices.com> | 2012-08-28 09:48:47 -0700 |
| commit | c3d278c1b04ce4c2b79e00fb54862ff6ba02236c (patch) | |
| tree | 70fecaa79871177a221d87fa6bf93d7da3676cd1 /init | |
| parent | 5f5960c072ac05b2ccc3f9d9ff7506fb31add0f3 (diff) | |
ENGR00211169-1 [SMP]Need to update loops_per_jiffy when cpufreq is changed
Need to update loops_per_jiffy when cpufreq is changed, our platform
only change the loops_per_jiffy of per_cpu cpu_data, we need to update
it to global loops_per_jiffy which is used for udelay.
Signed-off-by: Anson Huang <b20788@freescale.com>
Diffstat (limited to 'init')
| -rw-r--r-- | init/calibrate.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/init/calibrate.c b/init/calibrate.c index 24df7976816c..ebab7b344a65 100644 --- a/init/calibrate.c +++ b/init/calibrate.c @@ -10,6 +10,7 @@ #include <linux/timex.h> #include <linux/smp.h> #include <linux/percpu.h> +#include <asm/cpu.h> unsigned long lpj_fine; unsigned long preset_lpj; @@ -244,16 +245,14 @@ recalibrate: return lpj; } -static DEFINE_PER_CPU(unsigned long, cpu_loops_per_jiffy) = { 0 }; - void __cpuinit calibrate_delay(void) { unsigned long lpj; static bool printed; int this_cpu = smp_processor_id(); - if (per_cpu(cpu_loops_per_jiffy, this_cpu)) { - lpj = per_cpu(cpu_loops_per_jiffy, this_cpu); + if (per_cpu(cpu_data, this_cpu).loops_per_jiffy) { + lpj = per_cpu(cpu_data, this_cpu).loops_per_jiffy; pr_info("Calibrating delay loop (skipped) " "already calibrated this CPU"); } else if (preset_lpj) { @@ -274,7 +273,7 @@ void __cpuinit calibrate_delay(void) pr_info("Calibrating delay loop... "); lpj = calibrate_delay_converge(); } - per_cpu(cpu_loops_per_jiffy, this_cpu) = lpj; + per_cpu(cpu_data, this_cpu).loops_per_jiffy = lpj; if (!printed) pr_cont("%lu.%02lu BogoMIPS (lpj=%lu)\n", lpj/(500000/HZ), |