padata: use __this_cpu_read per-cpu helper

For bottom halves off, __this_cpu_read is better.

Signed-off-by: Shan Wei <davidshan@tencent.com>
Reviewed-by: Christoph Lameter <cl@linux.com>
Acked-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/kernel/padata.c b/kernel/padata.c
index 89fe3d1b9efbc1f34351e5752dd730db3c5bbab4..072f4ee4eb893a5341942146775c2ce9fcc1dbc8 100644 (file)
--- a/kernel/padata.c
+++ b/kernel/padata.c
@@ -171,7 +171,7 @@ static struct padata_priv *padata_get_next(struct parallel_data *pd)
 {
        int cpu, num_cpus;
        unsigned int next_nr, next_index;
-       struct padata_parallel_queue *queue, *next_queue;
+       struct padata_parallel_queue *next_queue;
        struct padata_priv *padata;
        struct padata_list *reorder;
 
@@ -204,8 +204,7 @@ static struct padata_priv *padata_get_next(struct parallel_data *pd)
                goto out;
        }
 
-       queue = per_cpu_ptr(pd->pqueue, smp_processor_id());
-       if (queue->cpu_index == next_queue->cpu_index) {
+       if (__this_cpu_read(pd->pqueue->cpu_index) == next_queue->cpu_index) {
                padata = ERR_PTR(-ENODATA);
                goto out;
        }