From 2f3edfd7e27ad4206acbc2ae99c9df5f46353024 Mon Sep 17 00:00:00 2001 From: Shawn Guo Date: Tue, 26 Mar 2013 16:46:07 +0800 Subject: ARM: imx: fix sync issue between imx_cpu_die and imx_cpu_kill 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 Cc: --- arch/arm/mach-imx/common.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'arch/arm/mach-imx/common.h') diff --git a/arch/arm/mach-imx/common.h b/arch/arm/mach-imx/common.h index 5a800bfcec5b..5bf4a97ab241 100644 --- a/arch/arm/mach-imx/common.h +++ b/arch/arm/mach-imx/common.h @@ -110,6 +110,8 @@ void tzic_handle_irq(struct pt_regs *); extern void imx_enable_cpu(int cpu, bool enable); extern void imx_set_cpu_jump(int cpu, void *jump_addr); +extern u32 imx_get_cpu_arg(int cpu); +extern void imx_set_cpu_arg(int cpu, u32 arg); extern void v7_cpu_resume(void); extern u32 *pl310_get_save_ptr(void); #ifdef CONFIG_SMP -- cgit v1.2.1