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MIPS: kexec: Mark CPU offline before disabling local IRQ

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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
This commit is contained in:
Dengcheng Zhu 2018-09-11 14:49:20 -07:00 committed by Paul Burton
parent 8250a9b43b
commit dc57aaf95a
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GPG Key ID: 3EA79FACB57500DD
2 changed files with 6 additions and 0 deletions
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3
arch/mips/kernel/crash.c
View File

@ -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);

3
arch/mips/kernel/machine_kexec.c
View File

@ -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.
*/