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: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/arch/blackfin/mach-common/smp.c b/arch/blackfin/mach-common/smp.c
index 40e6cbc..5f7617d 100644
--- a/arch/blackfin/mach-common/smp.c
+++ b/arch/blackfin/mach-common/smp.c
@@ -244,12 +244,13 @@
{
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 @@
{
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;
}