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Commit 567ebfc9 authored by Sonic Zhang's avatar Sonic Zhang Committed by Mike Frysinger
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Blackfin: SMP: disable preempt with smp_processor_id to send messages 



The smp_processor_id() API requires that preempt be disabled when calling
it, so make sure it is when we go to send messages to other processors.

Signed-off-by: default avatarSonic Zhang <sonic.zhang@analog.com>
Signed-off-by: default avatarMike Frysinger <vapier@gentoo.org>
parent ab61d2ac

arch/blackfin/mach-common/smp.c

+8 −6
Original line number Diff line number Diff line
@@ -244,13 +244,14 @@ int smp_call_function(void (*func)(void *info), void *info, int wait) 
{

	cpumask_t callmap;



	preempt_disable();

	callmap = cpu_online_map;

	cpu_clear(smp_processor_id(), callmap);

	if (cpus_empty(callmap))

		return 0;



	if (!cpus_empty(callmap))

		smp_send_message(callmap, BFIN_IPI_CALL_FUNC, func, info, wait);



	preempt_enable();



	return 0;

}

EXPORT_SYMBOL_GPL(smp_call_function);
@@ -286,13 +287,14 @@ void smp_send_stop(void) 
{

	cpumask_t callmap;



	preempt_disable();

	callmap = cpu_online_map;

	cpu_clear(smp_processor_id(), callmap);

	if (cpus_empty(callmap))

		return;



	if (!cpus_empty(callmap))

		smp_send_message(callmap, BFIN_IPI_CPU_STOP, NULL, NULL, 0);



	preempt_enable();



	return;

}