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Commit 754b404d authored by Dengcheng Zhu's avatar Dengcheng Zhu Committed by Greg Kroah-Hartman
Browse files

MIPS: kexec: Mark CPU offline before disabling local IRQ 



[ Upstream commit dc57aaf95a516f70e2d527d8287a0332c481a226 ]

After changing CPU online status, it will not be sent any IPIs such as in
__flush_cache_all() on software coherency systems. Do this before disabling
local IRQ.

Signed-off-by: default avatarDengcheng Zhu <dzhu@wavecomp.com>
Signed-off-by: default avatarPaul Burton <paul.burton@mips.com>
Patchwork: https://patchwork.linux-mips.org/patch/20571/


Cc: pburton@wavecomp.com
Cc: ralf@linux-mips.org
Cc: linux-mips@linux-mips.org
Cc: rachel.mozes@intel.com
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent e066306b

arch/mips/kernel/crash.c

+3 −0
Original line number Diff line number Diff line
@@ -36,6 +36,9 @@ static void crash_shutdown_secondary(void *passed_regs) 
	if (!cpu_online(cpu))

		return;



	/* We won't be sent IPIs any more. */

	set_cpu_online(cpu, false);



	local_irq_disable();

	if (!cpumask_test_cpu(cpu, &cpus_in_crash))

		crash_save_cpu(regs, cpu);

arch/mips/kernel/machine_kexec.c

+3 −0
Original line number Diff line number Diff line
@@ -118,6 +118,9 @@ machine_kexec(struct kimage *image) 
			*ptr = (unsigned long) phys_to_virt(*ptr);

	}



	/* Mark offline BEFORE disabling local irq. */

	set_cpu_online(smp_processor_id(), false);



	/*

	 * we do not want to be bothered.

	 */