ARM: imx: fix sync issue between imx_cpu_die and imx_cpu_kill

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There is a sync issue with hotplug operation.  It's possible that when
imx_cpu_kill gets running on primary core, the imx_cpu_die execution
on the core which is to be killed hasn't been finished yet.  The problem
will very likely be hit when running suspend without no_console_suspend
setting on kernel cmdline.

It uses cpu jumping argument register to sync imx_cpu_die and
imx_cpu_kill.  The register will be set in imx_cpu_die and imx_cpu_kill
will wait for the register being cleared to actually kill the cpu.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Cc: <stable@vger.kernel.org>

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This commit is contained in:

Shawn Guo 2013-03-26 16:46:07 +08:00

parent 287939a369

commit 2f3edfd7e2

3 changed files with 26 additions and 0 deletions

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2

arch/arm/mach-imx/common.h

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12

arch/arm/mach-imx/hotplug.c

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12

arch/arm/mach-imx/src.c

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