CPU hotplug: provide a generic helper to disable/enable CPU hotplug
authorSrivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Wed, 12 Jun 2013 21:04:36 +0000 (14:04 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 12 Jun 2013 23:29:44 +0000 (16:29 -0700)
commit16e53dbf10a2d7e228709a7286310e629ede5e45
tree4b606e077ba322764c584493243bbede219f737f
parent77293e215edef7871a39de4b326f777bc39278ca
CPU hotplug: provide a generic helper to disable/enable CPU hotplug

There are instances in the kernel where we would like to disable CPU
hotplug (from sysfs) during some important operation.  Today the freezer
code depends on this and the code to do it was kinda tailor-made for
that.

Restructure the code and make it generic enough to be useful for other
usecases too.

Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Signed-off-by: Robin Holt <holt@sgi.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Russ Anderson <rja@sgi.com>
Cc: Robin Holt <holt@sgi.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Cc: Shawn Guo <shawn.guo@linaro.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
include/linux/cpu.h
kernel/cpu.c