android_kernel_motorola_sm6225/arch/arm/include
Dave Martin 0de0d64675 ARM: 7848/1: mcpm: Implement cpu_kill() to synchronise on powerdown
CPU hotplug and kexec rely on smp_ops.cpu_kill(), which is supposed
to wait for the CPU to park or power down, and perform the last
rites (such as disabling clocks etc., where the platform doesn't do
this automatically).

kexec in particular is unsafe without performing this
synchronisation to park secondaries.  Without it, the secondaries
might not be parked when kexec trashes the kernel.

There is no generic way to do this synchronisation, so a new mcpm
platform_ops method power_down_finish() is added by this patch.

The new method is mandatory.  A platform which provides no way to
detect when CPUs are parked is likely broken.

Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Reviewed-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2013-10-29 11:07:15 +00:00
..
asm ARM: 7848/1: mcpm: Implement cpu_kill() to synchronise on powerdown 2013-10-29 11:07:15 +00:00
debug ARM: 7860/1: debug: msm: Add DEBUG_LL support for ARCH_MSM8974 2013-10-29 11:06:21 +00:00
uapi/asm ARM: 7791/1: a.out: remove partial a.out support 2013-07-26 12:02:10 +01:00