linux-kernel - Re: [PATCH v2 0/5] lib/find: add find_nth

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Date:   Thu, 14 Jul 2022 18:04:14 -0700
From:   Yury Norov <yury.norov@...il.com>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Alexander Lobakin <alexandr.lobakin@...el.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Arnd Bergmann <arnd@...db.de>, David Gow <davidgow@...gle.com>,
        Eric Dumazet <edumazet@...gle.com>,
        Isabella Basso <isabbasso@...eup.net>,
        Kees Cook <keescook@...omium.org>,
        Keith Busch <kbusch@...nel.org>,
        Kumar Kartikeya Dwivedi <memxor@...il.com>,
        Marco Elver <elver@...gle.com>,
        Mark Rutland <mark.rutland@....com>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        Steven Rostedt <rostedt@...dmis.org>,
        Toke Høiland-Jørgensen <toke@...hat.com>
Subject: Re: [PATCH v2 0/5] lib/find: add find_nth_bit()

On Tue, Jul 12, 2022 at 06:46:35PM -0700, Yury Norov wrote:
> On Tue, Jul 12, 2022 at 08:28:42PM +0200, Andy Shevchenko wrote:
> > On Tue, Jul 12, 2022 at 6:26 PM Yury Norov <yury.norov@...il.com> wrote:
> > > On Mon, Jul 11, 2022 at 1:55 AM Andy Shevchenko
> > > <andy.shevchenko@...il.com> wrote:
> > > > On Mon, Jul 11, 2022 at 6:51 AM Yury Norov <yury.norov@...il.com> wrote:
> > 
> > ...
> > 
> > > > 2) fns() is not good abbreviation, because among ffs (First) and fls
> > > > (Last), fns would be read as Next, which is misleading, I'm not sure
> > > > fnths(), which is correct, is good for readers.
> > >
> > > I agree that fns() may be confusing, but fnths() is even worse to me.
> > 
> > I also think it's not the best choice.
> > 
> > > I expect that it will be mostly used indirectly via find_nth_bit(), and
> > > will not create a lot of confusion for users.
> > 
> > Perhaps in that case we can survive with something else? Naming is hard...
> 
> OK, I'll move it to find.h and call __find_nth_bit().
> 
> Is this the only issue, or I'd wait for more comments?

I looked again, and I think that the structure of the code requires
to have fns() in bitops.h

Just because we can't think out a good name doesn't mean that we
should break existing structure. Let's keep things as is, and if
one day we'll find a better name - we'll rename it.

Regarding this:

> > > I expect that it will be mostly used indirectly via find_nth_bit()

It's not too important what I expect. For available functionality it's
much easier to find a place to use, and breaking people from doing it 
is silly.
 
> Thanks,
> Yury