linux-kernel - Re: [PATCH 01/40] lib/string_helpers: Drop space in string_get

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Message-ID: <CAHp75VdK2bgU8P+-np7ScVWTEpLrz+muG-R15SXm=ETXnjaiZg@mail.gmail.com>
Date:   Tue, 2 May 2023 08:33:57 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Kent Overstreet <kent.overstreet@...ux.dev>
Cc:     James Bottomley <James.Bottomley@...senpartnership.com>,
        Suren Baghdasaryan <surenb@...gle.com>,
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        Noralf Trï¿½nnes <noralf@...nnes.org>
Subject: Re: [PATCH 01/40] lib/string_helpers: Drop space in string_get_size's output

On Tue, May 2, 2023 at 6:18 AM Kent Overstreet
<kent.overstreet@...ux.dev> wrote:
> On Mon, May 01, 2023 at 10:22:18PM -0400, James Bottomley wrote:

...

> > > If someone raises a specific objection we'll do something different,
> > > otherwise I think standardizing on what userspace tooling already
> > > parses is a good idea.
> >
> > If you want to omit the space, why not simply add your own variant?  A
> > string_get_size_nospace() which would use most of the body of this one
> > as a helper function but give its own snprintf format string at the
> > end.  It's only a couple of lines longer as a patch and has the bonus
> > that it definitely wouldn't break anything by altering an existing
> > output.
>
> I'm happy to do that - I just wanted to post this version first to see
> if we can avoid the fragmentation and do a bit of standardizing with
> how everything else seems to do that.

Actually instead of producing zillions of variants, do a %p extension
to the printf() and that's it. We have, for example, %pt with T and
with space to follow users that want one or the other variant. Same
can be done with string_get_size().

-- 
With Best Regards,
Andy Shevchenko