tree 849d4f1e03cab2abacc68a25160ef023ee3da879
parent e15bc4559b397a611441a135b1f5992f07d0f436
author Rusty Russell <rusty@rustcorp.com.au> 1244726998 +0930
committer Dave Jones <davej@redhat.com> 1245080983 -0400

[CPUFREQ] cpumask: avoid playing with cpus_allowed in speedstep-ich.c

Impact: don't play with current's cpumask

It's generally a very bad idea to mug some process's cpumask: it could
legitimately and reasonably be changed by root, which could break us
(if done before our code) or them (if we restore the wrong value).

We use smp_call_function_single: this had the advantage of being more
efficient, too.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
To: cpufreq@vger.kernel.org
Cc: Dominik Brodowski <linux@brodo.de>
Signed-off-by: Dave Jones <davej@redhat.com>