Commit ebc4e05c authored Jun 12, 2014 by Stepan Moskovchenko Committed by Matt Wagantall May 30, 2015

arm64: show present cpu instead of online cpu in /proc/cpuinfo



Some userspace applications use /proc/cpuinfo to determine how many CPUs
the system has. CPU hotplug can offline a CPU at runtime and causing the
offline CPU not present in /proc/cpuinfo if we only show online cpu in
/proc/cpuinfo. Show all present CPUs in /proc/cpuinfo so that userspace
can take advantage of all availabie CPUs, even though some CPUs may have
been brought offline due to inactivity.

Change-Id: I6afe11e406c4a6ac0dd04d6abac11c2b68b9685a
Signed-off-by: Stepan Moskovchenko <stepanm@codeaurora.org>
[abhimany: resolve trivial merge conflicts]
Signed-off-by: Abhimanyu Kapur <abhimany@codeaurora.org>

parent 189cd51b

arch/arm64/kernel/setup.c

+0 −1

Original line number	Diff line number	Diff line
		@@ -494,7 +494,6 @@ static int c_show(struct seq_file m, void v)
		for_each_online_cpu(i) {
		struct cpuinfo_arm64 *cpuinfo = &per_cpu(cpu_data, i);
		u32 midr = cpuinfo->reg_midr;

		/*
		* glibc reads /proc/cpuinfo to determine the number of
		* online processors, looking for lines beginning with