linux-kernel - Re: [PATCH v2] lib/string.c: implement stpcpy

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Message-ID: <3ae89ad82dca2cf0adeba9d7d07f3c76ce577c39.camel@perches.com>
Date:   Tue, 18 Aug 2020 01:32:12 -0700
From:   Joe Perches <joe@...ches.com>
To:     David Laight <David.Laight@...LAB.COM>,
        'Nick Desaulniers' <ndesaulniers@...gle.com>,
        Sami Tolvanen <samitolvanen@...gle.com>,
        Arvind Sankar <nivedita@...m.mit.edu>,
        Kees Cook <keescook@...omium.org>
Cc:     Sedat Dilek <sedat.dilek@...il.com>,
        Fangrui Song <maskray@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Dávid Bolvanský <david.bolvansky@...il.com>,
        Eli Friedman <efriedma@...cinc.com>,
        "# 3.4.x" <stable@...r.kernel.org>,
        Vishal Verma <vishal.l.verma@...el.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        "Joel Fernandes (Google)" <joel@...lfernandes.org>,
        Daniel Axtens <dja@...ens.net>, Ingo Molnar <mingo@...nel.org>,
        Yury Norov <yury.norov@...il.com>,
        Alexandru Ardelean <alexandru.ardelean@...log.com>,
        LKML <linux-kernel@...r.kernel.org>,
        clang-built-linux <clang-built-linux@...glegroups.com>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        Nathan Chancellor <natechancellor@...il.com>
Subject: Re: [PATCH v2] lib/string.c: implement stpcpy

On Tue, 2020-08-18 at 08:24 +0000, David Laight wrote:
> From: Nick Desaulniers
> > Sent: 17 August 2020 19:37
> ..
> > That said, this libcall optimization/transformation (sprintf->stpcpy)
> > does look useful to me.
> 
> I'd rather get a cow if I ask for a cow...
> 
> Maybe checkpatch (etc) could report places where snprintf()
> could be replaced by a simpler function.

You mean sprintf no?

Reminds me of seq_printf vs seq_puts...

https://lkml.org/lkml/2013/3/16/79