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Blackfin: SMP: disable preempt with smp_processor_id to send messages

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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: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Sonic Zhang 2010-06-25 05:55:16 +00:00 committed by Mike Frysinger
parent ab61d2ac5c
commit 567ebfc99d
1 changed files with 8 additions and 6 deletions
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14
arch/blackfin/mach-common/smp.c
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@ -244,12 +244,13 @@ 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);
smp_send_message(callmap, BFIN_IPI_CALL_FUNC, func, info, wait);
preempt_enable();
return 0;
}
@ -286,12 +287,13 @@ 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);
smp_send_message(callmap, BFIN_IPI_CPU_STOP, NULL, NULL, 0);
preempt_enable();
return;
}