linux-kernel - Re: [PATCH] crypto: amlogic - Save a few bytes of memory

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]

Message-ID: <a3c848f9-d825-f9ff-eb6e-a3575d9871ff@wanadoo.fr>
Date:   Tue, 22 Nov 2022 23:26:14 +0100
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Cc:     Corentin Labbe <clabbe@...libre.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        linux-crypto@...r.kernel.org, linux-amlogic@...ts.infradead.org
Subject: Re: [PATCH] crypto: amlogic - Save a few bytes of memory

Le 22/11/2022 à 23:02, Martin Blumenstingl a écrit :
> On Tue, Nov 22, 2022 at 10:57 PM Christophe JAILLET
> <christophe.jaillet@...adoo.fr> wrote:
>>
>> There is no real point in allocating dedicated memory for the irqs array.
>> MAXFLOW is only 2, so it is easier to allocated the needed space
>> directly within the 'meson_dev' structure.
>>
>> This saves some memory allocation and avoids an indirection when using the
>> irqs array.
> ..and it even fixes a missing devm_kcalloc error check
> 
> Personally I prefer this approach over a patch that was sent earlier today: [0]

Funny.
A file untouched for about 18 months and 2 patches around the same line, 
... the same day!

> Corentin, Christophe, what do you think?

Obviously, mine is better :)

More seriously, I think it is mostly a mater of taste and that both are 
fine. Neither one will make a real difference IRL.

I guess that memory allocation failure in probe are unlikely and saving 
64 bytes (40 for devm_ + 2 x 4 = 48, rounded to 64 bytes) won't make any 
real difference.

Up to you.

CJ
> 
> 
> Best regards,
> Martin
> 
> 
> [0] https://lore.kernel.org/linux-crypto/0df30bbf-3b7e-ed20-e316-41192bf3cc2b@linaro.org/T/#m6a45b44206c282f106d379b01d19027823c5d79b
>