• Shawn Guo's avatar
    ARM: imx: fix sync issue between imx_cpu_die and imx_cpu_kill · 2f3edfd7
    Shawn Guo authored
    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: default avatarShawn Guo <shawn.guo@linaro.org>
    Cc: <stable@vger.kernel.org>
    2f3edfd7
common.h 5.04 KB