From f0fcf2002bf122afe8fe1b74b2cee3710c7e6cd9 Mon Sep 17 00:00:00 2001
From: Shan Wei <shanwei88@gmail.com>
Date: Thu, 6 Dec 2012 17:16:23 +0800
Subject: [PATCH] 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 | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/kernel/padata.c b/kernel/padata.c
index 89fe3d1b9efbc..072f4ee4eb893 100644
--- 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;
}
--
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