linux-kernel - Re: [PATCH v9 1/2] lib/bitmap: add bitmap

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] [day] [month] [year] [list]

Date:   Thu, 26 Oct 2023 16:34:24 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Alexander Potapenko <glider@...gle.com>
Cc:     catalin.marinas@....com, will@...nel.org, pcc@...gle.com,
        andreyknvl@...il.com, aleksander.lobakin@...el.com,
        linux@...musvillemoes.dk, yury.norov@...il.com,
        alexandru.elisei@....com, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, eugenis@...gle.com,
        syednwaris@...il.com, william.gray@...aro.org,
        Arnd Bergmann <arnd@...db.de>
Subject: Re: [PATCH v9 1/2] lib/bitmap: add bitmap_{read,write}()

On Thu, Oct 26, 2023 at 03:28:25PM +0200, Alexander Potapenko wrote:

...

> > I still didn't get the grouping you implied with this...
> 
> Given your second reply, I can disregard this one, right?

Yes.

...

> > > +     if (unlikely(!nbits || nbits > BITS_PER_LONG))
> > > +             return 0;
> >
> > ...this return in the Return section.
> >
> 
> Parameter description for @nbits actually mentions BITS_PER_LONG
> already, so would it be ok to drop the Note: and extend the Returns:
> section as follows:
> 
> + * Returns: value of nbits located at the @start bit offset within the @map
> + * memory region. For @nbits = 0 and @nbits > BITS_PER_LONG the return value
> + * is undefined.
> 
> ?

Fine to me.

> (Yury didn't want the zero return value to be part of the contract here).


-- 
With Best Regards,
Andy Shevchenko