This is a backport of mainline commit 92e788b74986.
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")
Cc: <stable@xxxxxxxxxxxxxxx> # 4.3 and earlier
Signed-off-by: Will Deacon <will.deacon@xxxxxxx>
---
arch/arm64/kernel/setup.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c
index 232247945b1c..9f17dc72645a 100644
--- a/arch/arm64/kernel/setup.c
+++ b/arch/arm64/kernel/setup.c
@@ -558,6 +558,10 @@ 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)
--
2.1.4
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