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authorPavel Machek <pavel@ucw.cz>2015-01-04 20:01:23 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2015-01-04 11:39:59 -0800
commit4bf9636c39ac70da091d5a2e28d3448eaa7f115c (patch)
treeb13eba730394b50d427c09955e0127afdc617758
parentd753856c9f9ae33a980192aa7b81d8b97d79dec2 (diff)
downloadlinux-linaro-stable-4bf9636c39ac70da091d5a2e28d3448eaa7f115c.tar.gz
Revert "ARM: 7830/1: delay: don't bother reporting bogomips in /proc/cpuinfo"
Commit 9fc2105aeaaf ("ARM: 7830/1: delay: don't bother reporting bogomips in /proc/cpuinfo") breaks audio in python, and probably elsewhere, with message FATAL: cannot locate cpu MHz in /proc/cpuinfo I'm not the first one to hit it, see for example https://theredblacktree.wordpress.com/2014/08/10/fatal-cannot-locate-cpu-mhz-in-proccpuinfo/ https://devtalk.nvidia.com/default/topic/765800/workaround-for-fatal-cannot-locate-cpu-mhz-in-proc-cpuinf/?offset=1 Reading original changelog, I have to say "Stop breaking working setups. You know who you are!". Signed-off-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--arch/arm/kernel/setup.c9
-rw-r--r--arch/arm/kernel/smp.c12
2 files changed, 21 insertions, 0 deletions
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index f9c863911038..715ae19bc7c8 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -1046,6 +1046,15 @@ static int c_show(struct seq_file *m, void *v)
seq_printf(m, "model name\t: %s rev %d (%s)\n",
cpu_name, cpuid & 15, elf_platform);
+#if defined(CONFIG_SMP)
+ seq_printf(m, "BogoMIPS\t: %lu.%02lu\n",
+ per_cpu(cpu_data, i).loops_per_jiffy / (500000UL/HZ),
+ (per_cpu(cpu_data, i).loops_per_jiffy / (5000UL/HZ)) % 100);
+#else
+ seq_printf(m, "BogoMIPS\t: %lu.%02lu\n",
+ loops_per_jiffy / (500000/HZ),
+ (loops_per_jiffy / (5000/HZ)) % 100);
+#endif
/* dump out the processor features */
seq_puts(m, "Features\t: ");
diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index 5e6052e18850..86ef244c5a24 100644
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -387,6 +387,18 @@ asmlinkage void secondary_start_kernel(void)
void __init smp_cpus_done(unsigned int max_cpus)
{
+ int cpu;
+ unsigned long bogosum = 0;
+
+ for_each_online_cpu(cpu)
+ bogosum += per_cpu(cpu_data, cpu).loops_per_jiffy;
+
+ printk(KERN_INFO "SMP: Total of %d processors activated "
+ "(%lu.%02lu BogoMIPS).\n",
+ num_online_cpus(),
+ bogosum / (500000/HZ),
+ (bogosum / (5000/HZ)) % 100);
+
hyp_mode_check();
}