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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <BANLkTikQjH5pdenTNRxyBwegbkRj0vGHLg@mail.gmail.com>
Date:	Tue, 24 May 2011 22:59:33 +0600
From:	Rakib Mullick <rakib.mullick@...il.com>
To:	Joe Perches <joe@...ches.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 5/23/11, Joe Perches <joe@...ches.com> wrote:
> 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.
>
Is there any significant benefit of using kcalloc here?


Thanks,
Rakib
>
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/