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MIPS: kexec: Mark CPU offline before disabling local IRQ
[ Upstream commit dc57aaf95a
]
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: Dengcheng Zhu <dzhu@wavecomp.com>
Signed-off-by: Paul 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: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -36,6 +36,9 @@ static void crash_shutdown_secondary(void *passed_regs)
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if (!cpu_online(cpu))
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return;
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/* We won't be sent IPIs any more. */
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set_cpu_online(cpu, false);
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local_irq_disable();
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if (!cpumask_test_cpu(cpu, &cpus_in_crash))
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crash_save_cpu(regs, cpu);
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@ -118,6 +118,9 @@ machine_kexec(struct kimage *image)
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*ptr = (unsigned long) phys_to_virt(*ptr);
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}
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/* Mark offline BEFORE disabling local irq. */
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set_cpu_online(smp_processor_id(), false);
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/*
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* we do not want to be bothered.
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*/
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