linux-kernel - Re: [PATCH v1 4/5] gpio: xilinx: Replace 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]

Message-ID: <ZRK8Uq699oeSOOg6@smile.fi.intel.com>
Date:   Tue, 26 Sep 2023 14:11:14 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Kent Gibson <warthog618@...il.com>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <bartosz.golaszewski@...aro.org>,
        Yury Norov <yury.norov@...il.com>, linux-gpio@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Shubhrajyoti Datta <shubhrajyoti.datta@....com>,
        Srinivas Neeli <srinivas.neeli@....com>,
        Michal Simek <michal.simek@....com>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        Marek Behún <kabel@...nel.org>
Subject: Re: [PATCH v1 4/5] gpio: xilinx: Replace bitmap_bitremap() calls

On Tue, Sep 26, 2023 at 06:41:00PM +0800, Kent Gibson wrote:
> On Tue, Sep 26, 2023 at 08:20:06AM +0300, Andy Shevchenko wrote:
> > We have sparse and dence masks of the line mappings based on
> 
> dense
> 
> > the view point (Linux numbering or hardware numbering). Since
> > the Linux side uses sequential bits for the mask, we can simply
> > convert a Linux number to the hardware one and vise versa by
> 
> vice
> 
> > counting set bits in the respective mask. Hence replace
> > bitmap_bitremap() calls by simpler equivalents.
> > 
> > With this done the dence mask is not needed and thus dropped.
> 
> And dense again.

Thank you, Kent, I really appreciate your help with my poor English,
nevertheless it would be nice if you can look at the last patch and
maybe even test it, so we have a bit of confidence that it works
as expected.

(The spelling will be fixed in the next version.)

-- 
With Best Regards,
Andy Shevchenko