| commit | 394122ab144dae4b276d74644a2f11c44a60ac5c | |
| author | Rusty Russell <rusty@rustcorp.com.au> | |
| Thu, 11 Jun 2009 13:29:58 +0000 (11 22:59 +0930) | ||
| committer | Dave Jones <davej@redhat.com> | |
| Mon, 15 Jun 2009 15:49:43 +0000 (15 11:49 -0400) | ||
| tree | 849d4f1e03cab2abacc68a25160ef023ee3da879 | treesnapshot (tar.gz zip) |
| parent | e15bc4559b397a611441a135b1f5992f07d0f436 | commitdiff |
[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>
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>
| arch/x86/kernel/cpu/cpufreq/speedstep-ich.c | diffblobblamehistory | |
| arch/x86/kernel/cpu/cpufreq/speedstep-lib.c | diffblobblamehistory |