linux-kernel - [PATCH 1/11] kernel/kfifo.c: trivial: use BUG

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Date:	Tue,  2 Aug 2011 12:34:54 +0200
From:	Julia Lawall <julia@...u.dk>
To:	Andrew Morton <akpm@...ux-foundation.org>, trivial@...nel.org
Cc:	kernel-janitors@...r.kernel.org,
	Stefani Seibold <stefani@...bold.net>,
	Andrea Righi <arighi@...eler.com>,
	"Ira W. Snyder" <iws@...o.caltech.edu>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 1/11] kernel/kfifo.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>

---
 kernel/kfifo.c |    6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff -u -p a/kernel/kfifo.c b/kernel/kfifo.c
--- a/kernel/kfifo.c
+++ b/kernel/kfifo.c
@@ -562,8 +562,7 @@ EXPORT_SYMBOL(__kfifo_to_user_r);
 unsigned int __kfifo_dma_in_prepare_r(struct __kfifo *fifo,
 	struct scatterlist *sgl, int nents, unsigned int len, size_t recsize)
 {
-	if (!nents)
-		BUG();
+	BUG_ON(!nents);
 
 	len = __kfifo_max_r(len, recsize);
 
@@ -586,8 +585,7 @@ EXPORT_SYMBOL(__kfifo_dma_in_finish_r);
 unsigned int __kfifo_dma_out_prepare_r(struct __kfifo *fifo,
 	struct scatterlist *sgl, int nents, unsigned int len, size_t recsize)
 {
-	if (!nents)
-		BUG();
+	BUG_ON(!nents);
 
 	len = __kfifo_max_r(len, recsize);
 

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