MIPS: smp: Make stop_this_cpu() actually stop the CPU

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Since cpu_wait() enables interrupts upon return, CPUs which have
entered stop_this_cpu() may still end up handling interrupts.
This can lead to the softlockup detector firing on a panic or
restart/poweroff/halt.  Just disable interrupts and spin to ensure
nothing else runs on the CPU once it has entered stop_this_cpu().

Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Maciej W. Rozycki <macro@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/9601/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

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Andrew Bresticker 2015-03-25 10:25:43 -07:00 • committed by Ralf Baechle

parent c1bed31f9c

commit ea925a72a2

1 changed files with 2 additions and 4 deletions

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arch/mips/kernel/smp.c

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