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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>
This commit is contained in:
Lai Jiangshan 2012-03-09 18:03:20 +08:00 committed by Tejun Heo
parent fde7d9049e
commit e06ffa1ede
1 changed files with 3 additions and 19 deletions
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22
kernel/workqueue.c
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@ -474,13 +474,8 @@ static struct cpu_workqueue_struct *get_cwq(unsigned int cpu,
struct workqueue_struct *wq) struct workqueue_struct *wq)
{ {
if (!(wq->flags & WQ_UNBOUND)) { if (!(wq->flags & WQ_UNBOUND)) {
if (likely(cpu < nr_cpu_ids)) { if (likely(cpu < nr_cpu_ids))
#ifdef CONFIG_SMP
return per_cpu_ptr(wq->cpu_wq.pcpu, cpu); return per_cpu_ptr(wq->cpu_wq.pcpu, cpu);
#else
return wq->cpu_wq.single;
#endif
}
} else if (likely(cpu == WORK_CPU_UNBOUND)) } else if (likely(cpu == WORK_CPU_UNBOUND))
return wq->cpu_wq.single; return wq->cpu_wq.single;
return NULL; 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 size = sizeof(struct cpu_workqueue_struct);
const size_t align = max_t(size_t, 1 << WORK_STRUCT_FLAG_BITS, const size_t align = max_t(size_t, 1 << WORK_STRUCT_FLAG_BITS,
__alignof__(unsigned long long)); __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); wq->cpu_wq.pcpu = __alloc_percpu(size, align);
else { else {
void *ptr; void *ptr;
@ -2927,13 +2917,7 @@ static int alloc_cwqs(struct workqueue_struct *wq)
static void free_cwqs(struct workqueue_struct *wq) static void free_cwqs(struct workqueue_struct *wq)
{ {
#ifdef CONFIG_SMP if (!(wq->flags & WQ_UNBOUND))
bool percpu = !(wq->flags & WQ_UNBOUND);
#else
bool percpu = false;
#endif
if (percpu)
free_percpu(wq->cpu_wq.pcpu); free_percpu(wq->cpu_wq.pcpu);
else if (wq->cpu_wq.single) { else if (wq->cpu_wq.single) {
/* the pointer to free is stored right after the cwq */ /* the pointer to free is stored right after the cwq */