commit f0fcf2002bf122afe8fe1b74b2cee3710c7e6cd9
author Shan Wei <shanwei88@gmail.com> Thu Dec 06 17:16:23 2012 +0800
committer Herbert Xu <herbert@gondor.apana.org.au> Thu Dec 06 17:16:23 2012 +0800
tree 46168e26a49dc4207803ff10c056f2cd74393f46
parent a465348ff5d3e564ae0bcde63d5ef2066c079aad

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>

kernel/padata.c

diff --git a/kernel/padata.c b/kernel/padata.c
index 89fe3d1..072f4ee 100644
--- a/kernel/padata.c
+++ b/kernel/padata.c
@@ -171,7 +171,7 @@
 {
 	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 @@
 		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;
 	}