X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;f=init%2Fcalibrate.c;h=24df7976816c6ca99f3403f97444f8e49f69a0a7;hb=9be08c5804ae4ad96ec22d0b1e71e630803a85ea;hp=aae2f40fea4cbea200f0658c7f6afddb60f1d934;hpb=603f2e6d378948bf5e5ac04d98673761362a3b79;p=mv-sheeva.git

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),