linux-kernel - Re: [PATCH 2/3] drm: tweak header name

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Date:   Fri, 8 Feb 2019 07:55:32 -0500
From:   "Michael S. Tsirkin" <mst@...hat.com>
To:     linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
        Arnd Bergmann <arnd@...db.de>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <maxime.ripard@...tlin.com>,
        Sean Paul <sean@...rly.run>, David Airlie <airlied@...ux.ie>,
        dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH 2/3] drm: tweak header name

On Fri, Feb 08, 2019 at 09:56:59AM +0100, Daniel Vetter wrote:
> On Fri, Feb 08, 2019 at 01:02:58AM -0500, Michael S. Tsirkin wrote:
> > Use linux/mman.h to make sure we get all mmap flags we need.
> > 
> > Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
> 
> drmP.h is seriously deprecated (and a monster mess). If this fixes
> anything, I think would be better to include the right header in the right
> places, and leave drmP.h to die quietly ...
> 
> What exactly does this fix?
> -Daniel

I don't know. I am moving flags from asm/mman.h and if there
are direct users which there should not be, some code
might break. Even if it's a bad header people copy
code around, so why leave wrong examples there?
What's the harm in being proactive?


> > ---
> >  include/drm/drmP.h | 3 +--
> >  1 file changed, 1 insertion(+), 2 deletions(-)
> > 
> > diff --git a/include/drm/drmP.h b/include/drm/drmP.h
> > index bdb0d5548f39..a3184416ddc5 100644
> > --- a/include/drm/drmP.h
> > +++ b/include/drm/drmP.h
> > @@ -57,8 +57,7 @@
> >  #include <linux/workqueue.h>
> >  #include <linux/dma-fence.h>
> >  #include <linux/module.h>
> > -
> > -#include <asm/mman.h>
> > +#include <linux/mman.h>
> >  #include <asm/pgalloc.h>
> >  #include <linux/uaccess.h>
> >  
> > -- 
> > MST
> > 
> 
> -- 
> Daniel Vetter
> Software Engineer, Intel Corporation
> http://blog.ffwll.ch