Messages in this thread Patch in this message | | | Date | Tue, 13 Nov 2012 09:52:33 +0800 | From | Shan Wei <> | Subject | [PATCH v4 5/9] kernel: padata : use __this_cpu_read per-cpu helper |
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From: Shan Wei <davidshan@tencent.com>
For bottom halves off, __this_cpu_read is better.
Signed-off-by: Shan Wei <davidshan@tencent.com> Reviewed-by: Christoph Lameter <cl@linux.com> --- no changes vs v4. --- kernel/padata.c | 5 ++--- 1 files changed, 2 insertions(+), 3 deletions(-)
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 @@ 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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