kernel/cpu.c: Add comment for priority in cpu_hotplug_pm_callback
authorFenghua Yu <fenghua.yu@intel.com>
Tue, 13 Nov 2012 19:32:43 +0000 (11:32 -0800)
committerH. Peter Anvin <hpa@linux.intel.com>
Wed, 14 Nov 2012 17:39:50 +0000 (09:39 -0800)
commit6e32d479db6079dd5d4309aa66aecbcf2664a5fe
tree03ba72e475b2c640dc535b873d9c10cbf76e43f5
parent209efae12981f3d2d694499b761def10895c078c
kernel/cpu.c: Add comment for priority in cpu_hotplug_pm_callback

cpu_hotplug_pm_callback should have higher priority than
bsp_pm_callback which depends on cpu_hotplug_pm_callback to disable cpu hotplug
to avoid race during bsp online checking.

This is to hightlight the priorities between the two callbacks in case people
may overlook the order.

Ideally the priorities should be defined in macro/enum instead of fixed values.
To do that, a seperate patchset may be pushed which will touch serveral other
generic files and is out of scope of this patchset.

Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Link: http://lkml.kernel.org/r/1352835171-3958-7-git-send-email-fenghua.yu@intel.com
Reviewed-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
kernel/cpu.c