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| author | Christoph Lameter <cl@linux.com> | 2014-08-26 19:12:21 -0500 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2014-08-28 08:58:57 -0400 |
| commit | 4ba2968420fa9d0604b6a6a5c61bfa8d0fa84ae0 (patch) | |
| tree | a1051b2a4a23ae8f943f3ae97c0adf6b594e2df0 /arch/x86/oprofile | |
| parent | 23f66e2d661b4d3226d16e25910a9e9472ce2410 (diff) | |
| download | linux-4ba2968420fa9d0604b6a6a5c61bfa8d0fa84ae0.tar.bz2 | |
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.c | 2 |
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 98ab13058f89..ad1d91f475ab 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; } |