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@cn.fujitsu.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index bec7b5b53e03db1d443a2f221255fd22344f4de4..5bbba094bfac36b9697ed57ed24828bc6bafa508 100644 (file)
--- 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 */