linux-kernel - [PATCH 4/4] drivers/leds/leds-pca9532.c: delete useless initialization

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Message-Id: <1312453774-23333-5-git-send-email-julia@diku.dk>
Date:	Thu,  4 Aug 2011 12:29:34 +0200
From:	Julia Lawall <julia@...u.dk>
To:	Riku Voipio <riku.voipio@....fi>
Cc:	kernel-janitors@...r.kernel.org,
	Richard Purdie <rpurdie@...ys.net>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 4/4] drivers/leds/leds-pca9532.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/leds/leds-pca9532.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff -u -p a/drivers/leds/leds-pca9532.c b/drivers/leds/leds-pca9532.c
--- a/drivers/leds/leds-pca9532.c
+++ b/drivers/leds/leds-pca9532.c
@@ -447,7 +447,7 @@ exit:
 static int pca9532_probe(struct i2c_client *client,
 	const struct i2c_device_id *id)
 {
-	struct pca9532_data *data = i2c_get_clientdata(client);
+	struct pca9532_data *data;
 	struct pca9532_platform_data *pca9532_pdata = client->dev.platform_data;
 	int err;
 

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