Commit 22038704 authored Sep 25, 2020 by Marc Zyngier

ARM: Handle no IPI being registered in show_ipi_list()



As SMP-on-UP is a valid configuration on 32bit ARM, do not assume that
IPIs are populated in show_ipi_list().

Reported-by: Guillaume Tucker <guillaume.tucker@collabora.com>
Reported-by: kernelci.org bot <bot@kernelci.org>
Tested-by: Guillaume Tucker <guillaume.tucker@collabora.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>

parent ac15a54e

arch/arm/kernel/smp.c

+6 −1

Original line number	Diff line number	Diff line
		@@ -541,7 +541,12 @@ void show_ipi_list(struct seq_file *p, int prec)
		unsigned int cpu, i;

		for (i = 0; i < NR_IPI; i++) {
		unsigned int irq = irq_desc_get_irq(ipi_desc[i]);
		unsigned int irq;

		if (!ipi_desc[i])
		continue;

		irq = irq_desc_get_irq(ipi_desc[i]);
		seq_printf(p, "%*s%u: ", prec - 1, "IPI", i);

		for_each_online_cpu(cpu)

Admin message