[PATCH v2 5/9] kernel: padata : use this_cpu_read per-cpu helper

[Shan Wei]

From: Shan Wei 


Signed-off-by: Shan Wei 
---
 kernel/padata.c |5 ++---
 1 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/kernel/padata.c b/kernel/padata.c
index 89fe3d1..cf94137 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;
}
-- 
1.7.1

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Re: [PATCH v2 5/9] kernel: padata : use this_cpu_read per-cpu helper

[Christoph Lameter]

On Sat, 3 Nov 2012, Shan Wei wrote:

> - 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);

Reviewed-by: Christoph Lameter 

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