linux-kernel - Re: [PATCH v2 8/9] lib/vsprintf: Remove useless NULL checks

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Message-ID: <1519814668.10722.268.camel@linux.intel.com>
Date:   Wed, 28 Feb 2018 12:44:28 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Petr Mladek <pmladek@...e.com>
Cc:     "Tobin C . Harding" <me@...in.cc>, linux@...musvillemoes.dk,
        Joe Perches <joe@...ches.com>, linux-kernel@...r.kernel.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        Michal Hocko <mhocko@...e.cz>
Subject: Re: [PATCH v2 8/9] lib/vsprintf: Remove useless NULL checks

On Wed, 2018-02-28 at 11:04 +0100, Petr Mladek wrote:
> On Tue 2018-02-27 19:35:50, Andy Shevchenko wrote:
> > On Tue, 2018-02-27 at 16:50 +0100, Petr Mladek wrote:
> > > On Fri 2018-02-16 23:07:10, Andy Shevchenko wrote:
> > > > 
> > > 

> > > This macro matches also values <= 16.
> > 
> > Yes, I know.
> > 
> > This had been discussed with Rasmus and we agreed that printing a
> > result
> > of kmalloc(0) is rather weird.
> 
> I see
> https://lkml.kernel.org/r/1500546142.29303.133.camel@linux.intel.com
> There you suggested to move this check into pointer(). But I do not
> see any agreement on this.
> 

Btw, I'm pretty sure that the checks like this or another one with
PAGE_SIZE is cargo cult programming rather than imaging possible so
weird use cases.

-- 
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Intel Finland Oy