From: Tejun Heo <tj@kernel.org>
To: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: linux-next@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH wq#for-next] workqueue: fix build problem on !CONFIG_SMP
Date: Tue, 20 Jul 2010 11:17:03 +0200 [thread overview]
Message-ID: <4C45698F.9010607@kernel.org> (raw)
In-Reply-To: <20100720151030.f874832e.sfr@canb.auug.org.au>
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>
---
kernel/workqueue.c | 18 ++++++++++++++----
1 files changed, 14 insertions(+), 4 deletions(-)
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index aca9472..79a11e4 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 */
--
1.6.4.2
prev parent reply other threads:[~2010-07-20 9:17 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-20 5:10 linux-next: build failure after merge of the final tree (workqueues tree related) Stephen Rothwell
2010-07-20 8:42 ` Tejun Heo
2010-07-20 9:17 ` Tejun Heo [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4C45698F.9010607@kernel.org \
--to=tj@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-next@vger.kernel.org \
--cc=sfr@canb.auug.org.au \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).