forked from Minki/linux
s390/cpum_sf: Remove superfluous SMP function call
Since commit 3b9d6da67e
("cpu/hotplug: Fix rollback during error-out
in __cpu_disable()") it is ensured that callbacks of CPU_ONLINE and
CPU_DOWN_PREPARE are processed on the hotplugged CPU. Due to this SMP
function calls are no longer required.
Replace smp_call_function_single() with a direct call of
setup_pmc_cpu(). To keep the calling convention, interrupts are
explicitly disabled around the call.
Cc: linux-s390@vger.kernel.org
Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de>
Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
parent
5bc7353901
commit
e18eb2d1eb
@ -1510,7 +1510,6 @@ static void cpumf_measurement_alert(struct ext_code ext_code,
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static int cpumf_pmu_notifier(struct notifier_block *self,
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unsigned long action, void *hcpu)
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{
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unsigned int cpu = (long) hcpu;
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int flags;
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/* Ignore the notification if no events are scheduled on the PMU.
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@ -1523,11 +1522,15 @@ static int cpumf_pmu_notifier(struct notifier_block *self,
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case CPU_ONLINE:
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case CPU_DOWN_FAILED:
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flags = PMC_INIT;
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smp_call_function_single(cpu, setup_pmc_cpu, &flags, 1);
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local_irq_disable();
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setup_pmc_cpu(&flags);
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local_irq_enable();
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break;
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case CPU_DOWN_PREPARE:
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flags = PMC_RELEASE;
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smp_call_function_single(cpu, setup_pmc_cpu, &flags, 1);
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local_irq_disable();
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setup_pmc_cpu(&flags);
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local_irq_enable();
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break;
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default:
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break;
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