path: root/arch
diff options
authorYang Shi <>2015-11-18 10:48:55 -0800
committerCatalin Marinas <>2015-11-19 17:57:18 +0000
commit92e788b749862ebe9920360513a718e5dd4da7a9 (patch)
treed839587c92f23e6c2087705a9723ab1bddf26359 /arch
parentc139aa60c1007429335131167a0ca181e38c5668 (diff)
arm64: restore bogomips information in /proc/cpuinfo
As previously reported, some userspace applications depend on bogomips showed by /proc/cpuinfo. Although there is much less legacy impact on aarch64 than arm, it does break libvirt. This patch reverts commit 326b16db9f69 ("arm64: delay: don't bother reporting bogomips in /proc/cpuinfo"), but with some tweak due to context change and without the pr_info(). Fixes: 326b16db9f69 ("arm64: delay: don't bother reporting bogomips in /proc/cpuinfo") Signed-off-by: Yang Shi <> Acked-by: Will Deacon <> Cc: <> # 3.12+ Signed-off-by: Catalin Marinas <>
Diffstat (limited to 'arch')
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/arm64/kernel/cpuinfo.c b/arch/arm64/kernel/cpuinfo.c
index 706679d0a0b4..212ae6361d8b 100644
--- a/arch/arm64/kernel/cpuinfo.c
+++ b/arch/arm64/kernel/cpuinfo.c
@@ -30,6 +30,7 @@
#include <linux/seq_file.h>
#include <linux/sched.h>
#include <linux/smp.h>
+#include <linux/delay.h>
* In case the boot CPU is hotpluggable, we record its initial state and
@@ -112,6 +113,10 @@ static int c_show(struct seq_file *m, void *v)
seq_printf(m, "processor\t: %d\n", i);
+ seq_printf(m, "BogoMIPS\t: %lu.%02lu\n",
+ loops_per_jiffy / (500000UL/HZ),
+ loops_per_jiffy / (5000UL/HZ) % 100);
* Dump out the common processor features in a single line.
* Userspace should read the hwcaps with getauxval(AT_HWCAP)