linux-kernel - Re: [PATCH v2] gpu/drm_memory: fix a few warnings

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Message-ID: <1562614919.8510.9.camel@lca.pw>
Date:   Mon, 08 Jul 2019 15:41:59 -0400
From:   Qian Cai <cai@....pw>
To:     Ilia Mirkin <imirkin@...m.mit.edu>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Sean Paul <sean@...rly.run>, joe@...ches.com,
        linux-spdx@...hiver.kernel.org,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        LKML <linux-kernel@...r.kernel.org>, rfontana@...hat.com,
        tglx@...utronix.de, torvalds@...ux-foundation.org, corbet@....net,
        gregkh@...uxfoundation.org
Subject: Re: [PATCH v2] gpu/drm_memory: fix a few warnings

On Mon, 2019-07-08 at 15:21 -0400, Ilia Mirkin wrote:
> On Mon, Jul 8, 2019 at 2:06 PM Qian Cai <cai@....pw> wrote:
> > 
> > The opening comment mark "/**" is reserved for kernel-doc comments, so
> > it will generate a warning with "make W=1".
> > 
> > drivers/gpu/drm/drm_memory.c:2: warning: Cannot understand  * \file
> > drm_memory.c
> > 
> > Also, silence a checkpatch warning by adding a license identfiter where
> > it indicates the MIT license further down in the source file.
> > 
> > WARNING: Missing or malformed SPDX-License-Identifier tag in line 1
> > 
> > It becomes redundant to add both an SPDX identifier and have a
> > description of the license in the comment block at the top, so remove
> > the later.
> > 
> > Signed-off-by: Qian Cai <cai@....pw>
> > ---
> > 
> > v2: remove the redundant description of the license.
> > 
> >  drivers/gpu/drm/drm_memory.c | 22 ++--------------------
> >  1 file changed, 2 insertions(+), 20 deletions(-)
> > 
> > diff --git a/drivers/gpu/drm/drm_memory.c b/drivers/gpu/drm/drm_memory.c
> > index 132fef8ff1b6..86a11fc8e954 100644
> > --- a/drivers/gpu/drm/drm_memory.c
> > +++ b/drivers/gpu/drm/drm_memory.c
> > @@ -1,4 +1,5 @@
> > -/**
> > +// SPDX-License-Identifier: MIT
> > +/*
> >   * \file drm_memory.c
> >   * Memory management wrappers for DRM
> >   *
> > @@ -12,25 +13,6 @@
> >   * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
> >   * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
> >   * All Rights Reserved.
> > - *
> > - * Permission is hereby granted, free of charge, to any person obtaining a
> > - * copy of this software and associated documentation files (the
> > "Software"),
> > - * to deal in the Software without restriction, including without
> > limitation
> > - * the rights to use, copy, modify, merge, publish, distribute, sublicense,
> > - * and/or sell copies of the Software, and to permit persons to whom the
> > - * Software is furnished to do so, subject to the following conditions:
> > - *
> > - * The above copyright notice and this permission notice (including the
> > next
> > - * paragraph) shall be included in all copies or substantial portions of
> > the
> > - * Software.
> > - *
> > - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
> > OR
> > - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> > - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
> > - * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES
> > OR
> 
> This talks about VA Linux Systems and/or its suppliers, while the MIT
> licence talks about authors or copyright holders.
> 
> Are such transformations OK to just do?

From,

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Document
ation/process/license-rules.rst

"The Linux kernel requires the precise SPDX identifier in all source files."

That is the closest license I can think of.

Anyway, I have added a few people who may know better of the licensing.

> 
>   -ilia
> 
> > - * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
> > - * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
> > - * OTHER DEALINGS IN THE SOFTWARE.
> >   */
> > 
> >  #include <linux/highmem.h>
> > --
> > 1.8.3.1
> >