Title: [8945] trunk/arch/blackfin/mach-common/smp.c: Fix bug[#5983] smp_processor_id should be called with preempt disabled
- Revision
- 8945
- Author
- sonicz
- Date
- 2010-06-25 01:55:16 -0400 (Fri, 25 Jun 2010)
Log Message
Fix bug[#5983] smp_processor_id should be called with preempt disabled
in preemption kernel when hardware irq are enabled.
Modified Paths
Diff
Modified: trunk/arch/blackfin/mach-common/smp.c (8944 => 8945)
--- trunk/arch/blackfin/mach-common/smp.c 2010-06-24 13:56:33 UTC (rev 8944)
+++ trunk/arch/blackfin/mach-common/smp.c 2010-06-25 05:55:16 UTC (rev 8945)
@@ -246,12 +246,13 @@
{
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;
}
@@ -288,12 +289,13 @@
{
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;
}
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