From 9b03d8abe06d92195712fd489b2e8983de27fa68 Mon Sep 17 00:00:00 2001 From: Paul Burton Date: Fri, 2 Jun 2017 14:48:49 -0700 Subject: [PATCH] MIPS: Skip IPI setup if we only have 1 CPU If we're running on a system with only 1 possible CPU then it makes no sense to reserve or initialise IPIs since we'll never use them. Avoid doing so. Signed-off-by: Paul Burton Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/16192/ Signed-off-by: Ralf Baechle --- arch/mips/kernel/smp.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/mips/kernel/smp.c b/arch/mips/kernel/smp.c index aba1afb64b62..770d4d1516cb 100644 --- a/arch/mips/kernel/smp.c +++ b/arch/mips/kernel/smp.c @@ -335,6 +335,9 @@ int mips_smp_ipi_free(const struct cpumask *mask) static int __init mips_smp_ipi_init(void) { + if (num_possible_cpus() == 1) + return 0; + mips_smp_ipi_allocate(cpu_possible_mask); call_desc = irq_to_desc(call_virq); -- 2.39.5