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MIPS: Skip IPI setup if we only have 1 CPU

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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 <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/16192/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Paul Burton 2017-06-02 14:48:49 -07:00 committed by Ralf Baechle
parent f259fe295e
commit 9b03d8abe0
1 changed files with 3 additions and 0 deletions
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3
arch/mips/kernel/smp.c
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@ -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);