linux-kernel - [PATCH 3/4] drivers/media/video/hexium_gemini.c: delete useless initialization

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Message-Id: <1312453774-23333-4-git-send-email-julia@diku.dk>
Date:	Thu,  4 Aug 2011 12:29:33 +0200
From:	Julia Lawall <julia@...u.dk>
To:	Mauro Carvalho Chehab <mchehab@...radead.org>
Cc:	kernel-janitors@...r.kernel.org,
	Paul Gortmaker <paul.gortmaker@...driver.com>,
	Lucas De Marchi <lucas.demarchi@...fusion.mobi>,
	Jean Delvare <khali@...ux-fr.org>,
	Hans Verkuil <hverkuil@...all.nl>, linux-media@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 3/4] drivers/media/video/hexium_gemini.c: delete useless initialization

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

Delete nontrivial initialization that is immediately overwritten by the
result of an allocation function.

The semantic match that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
type T;
identifier i;
expression e;
@@

(
T i = \(0\|NULL\|ERR_PTR(...)\);
|
-T i = e;
+T i;
)
... when != i
i = \(kzalloc\|kcalloc\|kmalloc\)(...);

// </smpl>

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

---
 drivers/media/video/hexium_gemini.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff -u -p a/drivers/media/video/hexium_gemini.c b/drivers/media/video/hexium_gemini.c
--- a/drivers/media/video/hexium_gemini.c
+++ b/drivers/media/video/hexium_gemini.c
@@ -352,7 +352,7 @@ static struct saa7146_ext_vv vv_data;
 /* this function only gets called when the probing was successful */
 static int hexium_attach(struct saa7146_dev *dev, struct saa7146_pci_extension_data *info)
 {
-	struct hexium *hexium = (struct hexium *) dev->ext_priv;
+	struct hexium *hexium;
 	int ret;
 
 	DEB_EE((".\n"));

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