linux-kernel - Re: [PATCH] Make is_signed

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Message-ID: <20190929204424.GA14565@avx2>
Date:   Sun, 29 Sep 2019 23:44:24 +0300
From:   Alexey Dobriyan <adobriyan@...il.com>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
        jani.nikula@...ux.intel.com, joonas.lahtinen@...ux.intel.com,
        rodrigo.vivi@...el.com, intel-gfx@...ts.freedesktop.org,
        mingo@...hat.com, linux@...musvillemoes.dk
Subject: Re: [PATCH] Make is_signed_type() simpler

On Sun, Sep 29, 2019 at 04:15:31PM -0400, Steven Rostedt wrote:
> On Sun, 29 Sep 2019 23:06:19 +0300
> Alexey Dobriyan <adobriyan@...il.com> wrote:
> 
> > * Simply compare -1 with 0,
> > * Drop unnecessary parenthesis sets
> > 
> > New macro leaves pointer as "unsigned type" but gives a warning,
> > which should be fine because asking whether a pointer is signed is
> > strange question.
> > 
> > I'm not sure what's going on in the i915 driver, it is shipping kernel
> > pointers to userspace.
> 
> This tells us what the patch does, not why.

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