linux-kernel - Re: [PATCH] drm/amdgpu: do not initialise global variables to 0 or NULL

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Date:   Mon, 2 Nov 2020 21:10:40 +0100
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Alex Deucher <alexdeucher@...il.com>
Cc:     Deepak R Varma <mh12gx2825@...il.com>,
        Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        amd-gfx list <amd-gfx@...ts.freedesktop.org>,
        Maling list - DRI developers 
        <dri-devel@...ts.freedesktop.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Melissa Wen <melissa.srw@...il.com>,
        Daniel Vetter <daniel.vetter@...ll.ch>
Subject: Re: [PATCH] drm/amdgpu: do not initialise global variables to 0 or
 NULL

On Mon, Nov 02, 2020 at 02:43:45PM -0500, Alex Deucher wrote:
> On Mon, Nov 2, 2020 at 1:42 PM Deepak R Varma <mh12gx2825@...il.com> wrote:
> >
> > Initializing global variable to 0 or NULL is not necessary and should
> > be avoided. Issue reported by checkpatch script as:
> > ERROR: do not initialise globals to 0 (or NULL).
> 
> I agree that this is technically correct, but a lot of people don't
> seem to know that so we get a lot of comments about this code for the
> variables that are not explicitly set.  Seems less confusing to
> initialize them even if it not necessary.  I don't have a particularly
> strong opinion on it however.

The kernel coding style is to do it this way.  You even save space and
time by doing it as well :)

thanks,

greg k-h