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authorSonic Zhang <sonic.zhang@analog.com>2010-06-25 05:55:16 +0000
committerMike Frysinger <vapier@gentoo.org>2011-03-18 04:01:02 -0400
commit567ebfc99d7546913408b560ad443a5315bf8a53 (patch)
treedce02fc76d5ef5ad08d7b0cbeec1679d4f3f5ad6 /arch/blackfin
parentab61d2ac5c9d7c9232b8455c8d889216ca9d4814 (diff)
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>
Diffstat (limited to 'arch/blackfin')
-rw-r--r--arch/blackfin/mach-common/smp.c14
1 files changed, 8 insertions, 6 deletions
diff --git a/arch/blackfin/mach-common/smp.c b/arch/blackfin/mach-common/smp.c
index 40e6cbc363f..5f7617d6690 100644
--- a/arch/blackfin/mach-common/smp.c
+++ b/arch/blackfin/mach-common/smp.c
@@ -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;
}