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Date: Fri, 09 Mar 2012 18:03:20 +0800 From: Lai Jiangshan <laijs@...fujitsu.com> To: Tejun Heo <tj@...nel.org> CC: LKML <linux-kernel@...r.kernel.org> Subject: [PATCH] workqueue: use percpu allocator for cwq on UP I notice that the commit bbddff makes percpu allocator can work on UP, So we don't need the magic way for UP. Signed-off-by: Lai Jiangshan <laijs@...fujitsu.com> --- Just pass build test kernel/workqueue.c | 22 +++------------------- 1 files changed, 3 insertions(+), 19 deletions(-) diff --git a/kernel/workqueue.c b/kernel/workqueue.c index bec7b5b..5bbba09 100644 --- a/kernel/workqueue.c +++ b/kernel/workqueue.c @@ -474,13 +474,8 @@ static struct cpu_workqueue_struct *get_cwq(unsigned int cpu, struct workqueue_struct *wq) { if (!(wq->flags & WQ_UNBOUND)) { - if (likely(cpu < nr_cpu_ids)) { -#ifdef CONFIG_SMP + if (likely(cpu < nr_cpu_ids)) return per_cpu_ptr(wq->cpu_wq.pcpu, cpu); -#else - return wq->cpu_wq.single; -#endif - } } else if (likely(cpu == WORK_CPU_UNBOUND)) return wq->cpu_wq.single; return NULL; @@ -2897,13 +2892,8 @@ static int alloc_cwqs(struct workqueue_struct *wq) const size_t size = sizeof(struct cpu_workqueue_struct); const size_t align = max_t(size_t, 1 << WORK_STRUCT_FLAG_BITS, __alignof__(unsigned long long)); -#ifdef CONFIG_SMP - bool percpu = !(wq->flags & WQ_UNBOUND); -#else - bool percpu = false; -#endif - if (percpu) + if (!(wq->flags & WQ_UNBOUND)) wq->cpu_wq.pcpu = __alloc_percpu(size, align); else { void *ptr; @@ -2927,13 +2917,7 @@ static int alloc_cwqs(struct workqueue_struct *wq) static void free_cwqs(struct workqueue_struct *wq) { -#ifdef CONFIG_SMP - bool percpu = !(wq->flags & WQ_UNBOUND); -#else - bool percpu = false; -#endif - - if (percpu) + if (!(wq->flags & WQ_UNBOUND)) free_percpu(wq->cpu_wq.pcpu); else if (wq->cpu_wq.single) { /* the pointer to free is stored right after the cwq */ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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