From: Lan Tianyu <tianyu.lan@intel.com>
Date: Wed, 26 Feb 2014 13:03:05 +0000 (+0800)
Subject: ACPI / processor: Rework processor throttling with work_on_cpu()
X-Git-Tag: v3.2.56~58
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bc07f983deb9895504eb35c0970e0abecd57960a;p=pandora-kernel.git

ACPI / processor: Rework processor throttling with work_on_cpu()

commit f3ca4164529b875374c410193bbbac0ee960895f upstream.

acpi_processor_set_throttling() uses set_cpus_allowed_ptr() to make
sure that the (struct acpi_processor)->acpi_processor_set_throttling()
callback will run on the right CPU.  However, the function may be
called from a worker thread already bound to a different CPU in which
case that won't work.

Make acpi_processor_set_throttling() use work_on_cpu() as appropriate
instead of abusing set_cpus_allowed_ptr().

Reported-and-tested-by: Jiri Olsa <jolsa@redhat.com>
Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
[rjw: Changelog]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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