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authorChristoph Lameter <cl@linux.com>2014-08-26 19:12:21 -0500
committerTejun Heo <tj@kernel.org>2014-08-28 08:58:57 -0400
commit4ba2968420fa9d0604b6a6a5c61bfa8d0fa84ae0 (patch)
treea1051b2a4a23ae8f943f3ae97c0adf6b594e2df0 /arch/x86/oprofile
parent23f66e2d661b4d3226d16e25910a9e9472ce2410 (diff)
downloadop-kernel-dev-4ba2968420fa9d0604b6a6a5c61bfa8d0fa84ae0.zip
op-kernel-dev-4ba2968420fa9d0604b6a6a5c61bfa8d0fa84ae0.tar.gz
percpu: Resolve ambiguities in __get_cpu_var/cpumask_var_t
__get_cpu_var can paper over differences in the definitions of cpumask_var_t and either use the address of the cpumask variable directly or perform a fetch of the address of the struct cpumask allocated elsewhere. This is important particularly when using per cpu cpumask_var_t declarations because in one case we have an offset into a per cpu area to handle and in the other case we need to fetch a pointer from the offset. This patch introduces a new macro this_cpu_cpumask_var_ptr() that is defined where cpumask_var_t is defined and performs the proper actions. All use cases where __get_cpu_var is used with cpumask_var_t are converted to the use of this_cpu_cpumask_var_ptr(). Signed-off-by: Christoph Lameter <cl@linux.com> Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'arch/x86/oprofile')
-rw-r--r--arch/x86/oprofile/op_model_p4.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/oprofile/op_model_p4.c b/arch/x86/oprofile/op_model_p4.c
index 98ab130..ad1d91f 100644
--- a/arch/x86/oprofile/op_model_p4.c
+++ b/arch/x86/oprofile/op_model_p4.c
@@ -372,7 +372,7 @@ static unsigned int get_stagger(void)
{
#ifdef CONFIG_SMP
int cpu = smp_processor_id();
- return cpu != cpumask_first(__get_cpu_var(cpu_sibling_map));
+ return cpu != cpumask_first(this_cpu_cpumask_var_ptr(cpu_sibling_map));
#endif
return 0;
}
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