From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tejun Heo Subject: [PATCH wq#for-next] workqueue: fix build problem on !CONFIG_SMP Date: Tue, 20 Jul 2010 11:17:03 +0200 Message-ID: <4C45698F.9010607@kernel.org> References: <20100720151030.f874832e.sfr@canb.auug.org.au> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from hera.kernel.org ([140.211.167.34]:59479 "EHLO hera.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758413Ab0GTJRJ (ORCPT ); Tue, 20 Jul 2010 05:17:09 -0400 In-Reply-To: <20100720151030.f874832e.sfr@canb.auug.org.au> Sender: linux-next-owner@vger.kernel.org List-ID: To: Stephen Rothwell Cc: linux-next@vger.kernel.org, linux-kernel@vger.kernel.org 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 Reported-by: Stephen Rothwell --- 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