[CPUFREQ] cpumask: avoid cpumask games in arch/x86/kernel/cpu/cpufreq/speedstep-centr...
commite3f996c26ff6c4c084aaaa64dce6e54d31f517be
authorRusty Russell <rusty@rustcorp.com.au>
Thu, 11 Jun 2009 13:29:58 +0000 (11 22:59 +0930)
committerDave Jones <davej@redhat.com>
Mon, 15 Jun 2009 15:49:43 +0000 (15 11:49 -0400)
treed49ec5b8935a91766678d7b671ffff25ce597670
parent394122ab144dae4b276d74644a2f11c44a60ac5c
[CPUFREQ] cpumask: avoid cpumask games in arch/x86/kernel/cpu/cpufreq/speedstep-centrino.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).

Use rdmsr_on_cpu and wrmsr_on_cpu instead.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
To: cpufreq@vger.kernel.org
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Signed-off-by: Dave Jones <davej@redhat.com>
arch/x86/kernel/cpu/cpufreq/speedstep-centrino.c