Commit 668bc386 authored Jan 11, 2014 by Russell King

ARM: SMP implementations are not supposed to return from smp_ops.cpu_die()



Although we allow recovery in this case, this is not supposed to be
the normal path for hotplugging a CPU back in.  This path only exists
to serve those rare platforms where it's not possible to power down
the CPU or reset the CPU.  This patch causes the kernel to print a
message when a platform uses this path.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

parent 571b1437

arch/arm/kernel/smp.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -293,6 +293,9 @@ void __ref cpu_die(void)
		if (smp_ops.cpu_die)
		smp_ops.cpu_die(cpu);

		pr_warn("CPU%u: smp_ops.cpu_die() returned, trying to resuscitate\n",
		cpu);

		/*
		* Do not return to the idle loop - jump back to the secondary
		* cpu initialisation. There's some initialisation which needs

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