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smp: Micro-optimize smp_call_function_many_cond()

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Call the generic send_call_function_single_ipi() function, which
will avoid the IPI when @last_cpu is idle.

Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Peter Zijlstra 2021-03-02 08:02:43 +01:00 committed by Ingo Molnar
parent a5aa5ce300
commit d43f17a1da
1 changed files with 1 additions and 1 deletions
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2
kernel/smp.c
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@ -694,7 +694,7 @@ static void smp_call_function_many_cond(const struct cpumask *mask,
* provided mask.
*/
if (nr_cpus == 1)
arch_send_call_function_single_ipi(last_cpu);
send_call_function_single_ipi(last_cpu);
else if (likely(nr_cpus > 1))
arch_send_call_function_ipi_mask(cfd->cpumask_ipi);
}