linux-kernel - Re: [EXT] Re: [PATCH net] octeontx2-af: Initialize bitmap arrays.

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: Windows password security audit tool. GUI, reports in PDF.

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

Date: Thu, 25 Jan 2024 07:56:22 -0800
From: Brett Creeley <bcreeley@....com>
To: Ratheesh Kannoth <rkannoth@...vell.com>,
 "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
 "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Cc: Sunil Kovvuri Goutham <sgoutham@...vell.com>,
 "davem@...emloft.net" <davem@...emloft.net>,
 "edumazet@...gle.com" <edumazet@...gle.com>,
 "kuba@...nel.org" <kuba@...nel.org>, "pabeni@...hat.com"
 <pabeni@...hat.com>, Subbaraya Sundeep Bhatta <sbhatta@...vell.com>,
 Geethasowjanya Akula <gakula@...vell.com>,
 Hariprasad Kelam <hkelam@...vell.com>
Subject: Re: [EXT] Re: [PATCH net] octeontx2-af: Initialize bitmap arrays.

On 1/24/2024 9:06 PM, Ratheesh Kannoth wrote:
> Caution: This message originated from an External Source. Use proper caution when opening attachments, clicking links, or responding.
> 
> 
>> From: Brett Creeley <bcreeley@....com>
>> Subject: [EXT] Re: [PATCH net] octeontx2-af: Initialize bitmap arrays.
>> Is there any reason to not use:
>>
>> bitmap_zalloc() and bitmap_free()?
> Will follow simon's suggestion to keep patch diff minimal. As bitmap_zalloc() does not give any advantage over the other.

It does make some sense because in multiple places you are open coding 
bitmap_zalloc()->bitmap_alloc() in multiple places.

For example:

         mcam->bmap = kmalloc_array(BITS_TO_LONGS(mcam->bmap_entries),
+                                  sizeof(long), GFP_KERNEL | __GFP_ZERO);

This is exactly what bitmap_zalloc()->bitmap_alloc() are doing.

> 
>>
>> This is pretty much bitmap_zalloc(), except with devm. As Simon is asking, is
>> devm really necessary?
> Will use kcalloc.