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>

1 files changed, 3 insertions, 19 deletions

diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index bec7b5b53e03..5bbba094bfac 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 */