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Commit 25ab5f50 authored by Kyle Yan's avatar Kyle Yan Committed by Gerrit - the friendly Code Review server
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Merge "ARM64: smp: Save CPU registers before IPI_CPU_STOP processing" into msm-4.8

parents 7afe6e96 f89e8680

arch/arm64/kernel/smp.c

+7 −2
Original line number Diff line number Diff line
@@ -809,15 +809,20 @@ void arch_irq_work_raise(void) 
#endif



static DEFINE_RAW_SPINLOCK(stop_lock);



DEFINE_PER_CPU(struct pt_regs, regs_before_stop);



/*

 * ipi_cpu_stop - handle IPI from smp_send_stop()

 */

static void ipi_cpu_stop(unsigned int cpu)

static void ipi_cpu_stop(unsigned int cpu, struct pt_regs *regs)

{

	if (system_state == SYSTEM_BOOTING ||

	    system_state == SYSTEM_RUNNING) {

		per_cpu(regs_before_stop, cpu) = *regs;

		raw_spin_lock(&stop_lock);

		pr_crit("CPU%u: stopping\n", cpu);

		show_regs(regs);

		dump_stack();

		raw_spin_unlock(&stop_lock);

	}
@@ -857,7 +862,7 @@ void handle_IPI(int ipinr, struct pt_regs *regs) 


	case IPI_CPU_STOP:

		irq_enter();

		ipi_cpu_stop(cpu);

		ipi_cpu_stop(cpu, regs);

		irq_exit();

		break;