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authorTejun Heo <tj@kernel.org>2010-07-20 11:07:48 +0200
committerTejun Heo <tj@kernel.org>2010-07-20 11:15:14 +0200
commit931ac77ef65d2d90ee1def63d2041402ec7c53ab (patch)
tree370153ff6e85c9e8e0d00f1811d214dbcba6b00a /kernel/workqueue.c
parent9f9c23644b07e7a51f6f39064e61c150be712932 (diff)
workqueue: fix build problem on !CONFIG_SMP
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>
Diffstat (limited to 'kernel/workqueue.c')
-rw-r--r--kernel/workqueue.c18
1 files changed, 14 insertions, 4 deletions
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index aca94726e20..79a11e40f31 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -2615,11 +2615,15 @@ 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 (CONFIG_SMP && !(wq->flags & WQ_UNBOUND)) {
- /* on SMP, percpu allocator can align itself */
+ if (percpu)
wq->cpu_wq.pcpu = __alloc_percpu(size, align);
- } else {
+ else {
void *ptr;
/*
@@ -2641,7 +2645,13 @@ static int alloc_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);
else if (wq->cpu_wq.single) {
/* the pointer to free is stored right after the cwq */