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workqueue: fix build problem on !CONFIG_SMP

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Commit f3421797 (workqueue: implement unbound workqueue) incorrectly
tested CONFIG_SMP as part of a C expression in alloc/free_cwqs().  As
CONFIG_SMP is not defined in UP, this breaks build.  Fix it by using

Found during linux-next build test.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
This commit is contained in:
Tejun Heo 2010-07-20 11:07:48 +02:00
parent 9f9c23644b
commit 931ac77ef6
1 changed files with 14 additions and 4 deletions
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18
kernel/workqueue.c
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@ -2615,11 +2615,15 @@ 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 (CONFIG_SMP && !(wq->flags & WQ_UNBOUND)) { if (percpu)
/* on SMP, percpu allocator can align itself */
wq->cpu_wq.pcpu = __alloc_percpu(size, align); wq->cpu_wq.pcpu = __alloc_percpu(size, align);
} else { else {
void *ptr; void *ptr;
/* /*
@ -2641,7 +2645,13 @@ static int alloc_cwqs(struct workqueue_struct *wq)
static void free_cwqs(struct workqueue_struct *wq) static void free_cwqs(struct workqueue_struct *wq)
{ {
if (CONFIG_SMP && !(wq->flags & WQ_UNBOUND)) #ifdef CONFIG_SMP
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 */