linux-kernel - [PATCH 20/20] drivers/mtd/nand: Use kzalloc

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Date:	Thu, 13 May 2010 22:07:46 +0200 (CEST)
From:	Julia Lawall <julia@...u.dk>
To:	Vincent Sanders <support@...tec.co.uk>,
	David Woodhouse <dwmw2@...radead.org>,
	linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: [PATCH 20/20] drivers/mtd/nand: Use kzalloc

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

Use kzalloc rather than the combination of kmalloc and memset.

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

// <smpl>
@@
expression x,size,flags;
statement S;
@@

-x = kmalloc(size,flags);
+x = kzalloc(size,flags);
 if (x == NULL) S
-memset(x, 0, size);
// </smpl>

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

---
 drivers/mtd/nand/s3c2410.c |    7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff -u -p a/drivers/mtd/nand/s3c2410.c b/drivers/mtd/nand/s3c2410.c
--- a/drivers/mtd/nand/s3c2410.c
+++ b/drivers/mtd/nand/s3c2410.c
@@ -929,14 +929,13 @@ static int s3c24xx_nand_probe(struct pla
 
 	pr_debug("s3c2410_nand_probe(%p)\n", pdev);
 
-	info = kmalloc(sizeof(*info), GFP_KERNEL);
+	info = kzalloc(sizeof(*info), GFP_KERNEL);
 	if (info == NULL) {
 		dev_err(&pdev->dev, "no memory for flash info\n");
 		err = -ENOMEM;
 		goto exit_error;
 	}
 
-	memset(info, 0, sizeof(*info));
 	platform_set_drvdata(pdev, info);
 
 	spin_lock_init(&info->controller.lock);
@@ -994,15 +993,13 @@ static int s3c24xx_nand_probe(struct pla
 	/* allocate our information */
 
 	size = nr_sets * sizeof(*info->mtds);
-	info->mtds = kmalloc(size, GFP_KERNEL);
+	info->mtds = kzalloc(size, GFP_KERNEL);
 	if (info->mtds == NULL) {
 		dev_err(&pdev->dev, "failed to allocate mtd storage\n");
 		err = -ENOMEM;
 		goto exit_error;
 	}
 
-	memset(info->mtds, 0, size);
-
 	/* initialise all possible chips */
 
 	nmtd = info->mtds;
--
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