linux-kernel - [PATCH 2/4] workqueue: use BUILD_BUG_ON() for compile time test instead of WARN

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Message-Id: <20200601084442.8284-3-laijs@linux.alibaba.com>
Date:   Mon,  1 Jun 2020 08:44:40 +0000
From:   Lai Jiangshan <laijs@...ux.alibaba.com>
To:     linux-kernel@...r.kernel.org
Cc:     Lai Jiangshan <laijs@...ux.alibaba.com>, Tejun Heo <tj@...nel.org>,
        Lai Jiangshan <jiangshanlai@...il.com>
Subject: [PATCH 2/4] workqueue: use BUILD_BUG_ON() for compile time test instead of WARN_ON()

Any runtime WARN_ON() has to be fixed, and BUILD_BUG_ON() can
help you nitice it earlier.

Signed-off-by: Lai Jiangshan <laijs@...ux.alibaba.com>
---
 kernel/workqueue.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 7a1fc9fe6314..35120b909234 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -5905,7 +5905,7 @@ void __init workqueue_init_early(void)
 	int hk_flags = HK_FLAG_DOMAIN | HK_FLAG_WQ;
 	int i, cpu;
 
-	WARN_ON(__alignof__(struct pool_workqueue) < __alignof__(long long));
+	BUILD_BUG_ON(__alignof__(struct pool_workqueue) < __alignof__(long long));
 
 	BUG_ON(!alloc_cpumask_var(&wq_unbound_cpumask, GFP_KERNEL));
 	cpumask_copy(wq_unbound_cpumask, housekeeping_cpumask(hk_flags));
-- 
2.20.1