linux-kernel - Re: [PATCH 3/8] lib/bitmap: change type of 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] [thread-next>] [day] [month] [year] [list]

Date:   Sat, 2 Jul 2022 14:57:51 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Yury Norov <yury.norov@...il.com>
Cc:     linux-kernel@...r.kernel.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        David Howells <dhowells@...hat.com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Jonathan Corbet <corbet@....net>,
        "Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>,
        Matthew Wilcox <willy@...radead.org>,
        NeilBrown <neilb@...e.de>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        Russell King <linux@...linux.org.uk>,
        Vlastimil Babka <vbabka@...e.cz>,
        William Kucharski <william.kucharski@...cle.com>,
        linux-doc@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mm@...ck.org
Subject: Re: [PATCH 3/8] lib/bitmap: change type of bitmap_weight to unsigned
 int

On Fri, Jul 01, 2022 at 05:54:25AM -0700, Yury Norov wrote:
> bitmap_weight() doesn't return negative values, so change it's type
> to unsigned int.

Patch (the code) suggests something else.

> It may help compiler to generate better code and
> catch bugs.

...

> -int __bitmap_weight(const unsigned long *bitmap, unsigned int nbits);
> +unsigned long __bitmap_weight(const unsigned long *bitmap, unsigned int nbits);

-- 
With Best Regards,
Andy Shevchenko