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| author | Arnd Bergmann <arnd@arndb.de> | 2011-07-28 15:25:46 +0000 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2011-07-28 15:25:46 +0000 |
| commit | 6124a4e430b64d1577438c8648c59e996d02e73e (patch) | |
| tree | 49cfafad785d1c9e403a5b0d755298b9af2c260f /init/calibrate.c | |
| parent | 8e267f3da5f117d2f1316cf6ddf740f93f1c73aa (diff) | |
| parent | 580975d7f48d7d047e22bb0f42adf7557801d8d4 (diff) | |
Merge branch 'imx/dt' into next/dt
Diffstat (limited to 'init/calibrate.c')
| -rw-r--r-- | init/calibrate.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/init/calibrate.c b/init/calibrate.c index aae2f40fea4..24df7976816 100644 --- a/init/calibrate.c +++ b/init/calibrate.c @@ -9,6 +9,7 @@ #include <linux/init.h> #include <linux/timex.h> #include <linux/smp.h> +#include <linux/percpu.h> unsigned long lpj_fine; unsigned long preset_lpj; @@ -243,12 +244,19 @@ 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 (preset_lpj) { + if (per_cpu(cpu_loops_per_jiffy, this_cpu)) { + lpj = per_cpu(cpu_loops_per_jiffy, this_cpu); + pr_info("Calibrating delay loop (skipped) " + "already calibrated this CPU"); + } else if (preset_lpj) { lpj = preset_lpj; if (!printed) pr_info("Calibrating delay loop (skipped) " @@ -266,6 +274,7 @@ void __cpuinit calibrate_delay(void) pr_info("Calibrating delay loop... "); lpj = calibrate_delay_converge(); } + per_cpu(cpu_loops_per_jiffy, this_cpu) = lpj; if (!printed) pr_cont("%lu.%02lu BogoMIPS (lpj=%lu)\n", lpj/(500000/HZ), |