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| author |   Paul Burton <paul.burton@imgtec.com> | 2017-06-02 14:48:49 -0700 |
|---|---|---|
| committer |   Ralf Baechle <ralf@linux-mips.org> | 2017-06-29 02:42:27 +0200 |
| commit | 9b03d8abe06d92195712fd489b2e8983de27fa68 (patch) | |
| tree | fc7de41aff5c54d5c040274b6bd1fd96e7a6af8e /arch/mips/kernel/smp.c | |
| parent | MIPS: Use `pr_debug' for messages from `__compute_return_epc_for_insn' (diff) | |
| download | linux-dev-9b03d8abe06d92195712fd489b2e8983de27fa68.tar.xz linux-dev-9b03d8abe06d92195712fd489b2e8983de27fa68.zip | |
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 <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>
Diffstat (limited to 'arch/mips/kernel/smp.c')
| -rw-r--r-- | arch/mips/kernel/smp.c | 3 |
1 files changed, 3 insertions, 0 deletions
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); |