[ARM] Solve buggy smp_processor_id() usage

BUG: using smp_processor_id() in preemptible [00000001] code: opcontrol/427 Resolve this bug by ensuring that we're not using smp_processor_id() in a preemptable context (by disabling preemption.) Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
git-mirror · Jun 2, 2007 · f72267c · f72267c
1 parent 29c349d
commit f72267c
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/arch/arm/oprofile/op_model_mpcore.c b/arch/arm/oprofile/op_model_mpcore.c
@@ -200,8 +200,10 @@ static int em_call_function(int (*fn)(void))
 	data.fn = fn;
 	data.ret = 0;
 
+	preempt_disable();
 	smp_call_function(em_func, &data, 1, 1);
 	em_func(&data);
+	preempt_enable();
 
 	return data.ret;
 }