linux-kernel - Re: [RFT PATCH v2] spi: bcm2835: reduce the abuse of the GPIO API

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:   Sat, 2 Sep 2023 18:56:51 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Mark Brown <broonie@...nel.org>
Cc:     Bartosz Golaszewski <brgl@...ev.pl>,
        Florian Fainelli <florian.fainelli@...adcom.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        Broadcom internal kernel review list 
        <bcm-kernel-feedback-list@...adcom.com>, linux-spi@...r.kernel.org,
        linux-rpi-kernel@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-gpio@...r.kernel.org,
        Bartosz Golaszewski <bartosz.golaszewski@...aro.org>,
        Dan Carpenter <dan.carpenter@...aro.org>
Subject: Re: [RFT PATCH v2] spi: bcm2835: reduce the abuse of the GPIO API

On Fri, Sep 1, 2023 at 2:31 PM Mark Brown <broonie@...nel.org> wrote:

> > > +       struct gpiod_lookup_table *lookup __free(kfree) = NULL;
>
> > Whoa!
> > This is really neat.
> > As noted, it will confuse static checkers at no end, but they just have
> > to adopt. (CC to Dan C if he now runs into this.)
>
> It also doesn't look amazing for humans, it's very not C like...

<linux/cleanup.h> and the __free() macro was introduced by Peter
Z who also very famously suggested (OTOMH!) that instead of
adopting Rust to the kernel it would be possible to bring the
desired Rust features into C.

Which is what he does, well the feature has been there for a while
but he identified it and made it easily accessible.

Now if this path is desirable ... yeah. Maybe a matter of taste.

Yours,
Linus Walleij