linux-kernel - Re: [PATCH] drivers: Use kzalloc instead of 'kmalloc+memset', where possible.

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Message-ID: <1306173085.8687.38.camel@Joe-Laptop>
Date:	Mon, 23 May 2011 10:51:25 -0700
From:	Joe Perches <joe@...ches.com>
To:	Rakib Mullick <rakib.mullick@...il.com>
Cc:	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] drivers: Use kzalloc instead of 'kmalloc+memset',
 where possible.

On Mon, 2011-05-23 at 23:40 +0600, Rakib Mullick wrote:
> Following patch removes the uses of 'kmalloc+memset' from various
> drivers subsystems, which is replaced by kzalloc. kzalloc take care of
> setting allocated memory with null, so it helps to get rid from using
> memset.
> diff --git a/drivers/gpu/drm/drm_scatter.c b/drivers/gpu/drm/drm_scatter.c
[]
> -	entry->pagelist = kmalloc(pages * sizeof(*entry->pagelist), GFP_KERNEL);
> +	entry->pagelist = kzalloc(pages * sizeof(*entry->pagelist), GFP_KERNEL);

Perhaps it's better to use:

	entry->pagelist =  kcalloc(pages, sizeof(*entry->pagelist), GFP_KERNEL);

> -	entry->busaddr = kmalloc(pages * sizeof(*entry->busaddr), GFP_KERNEL);
> +	entry->busaddr = kzalloc(pages * sizeof(*entry->busaddr), GFP_KERNEL);

here too.

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