linux-kernel - [PATCH 6/11] drivers/iommu/iommu.c: trivial: use BUG

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Date:	Tue,  2 Aug 2011 12:34:59 +0200
From:	Julia Lawall <julia@...u.dk>
To:	Ohad Ben-Cohen <ohad@...ery.com>, trivial@...nel.org
Cc:	kernel-janitors@...r.kernel.org,
	Joerg Roedel <joerg.roedel@....com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 6/11] drivers/iommu/iommu.c: trivial: use BUG_ON

From: Julia Lawall <julia@...u.dk>

Use BUG_ON(x) rather than if(x) BUG();

The semantic patch that fixes this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@ identifier x; @@
-if (x) BUG();
+BUG_ON(x);

@@ identifier x; @@
-if (!x) BUG();
+BUG_ON(!x);
// </smpl>

Signed-off-by: Julia Lawall <julia@...u.dk>

---
 drivers/iommu/iommu.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff -u -p a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -27,8 +27,7 @@ static struct iommu_ops *iommu_ops;
 
 void register_iommu(struct iommu_ops *ops)
 {
-	if (iommu_ops)
-		BUG();
+	BUG_ON(iommu_ops);
 
 	iommu_ops = ops;
 }

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