linux-kernel - Re: [PATCH] drm/shmem-helper: Fix locking for drm_gem_shmem_get_pages

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Message-ID: <ad89998c-0ede-72da-b8e6-fe1de0f009f1@asahilina.net>
Date:   Mon, 27 Feb 2023 18:07:38 +0900
From:   Asahi Lina <lina@...hilina.net>
To:     Thomas Zimmermann <tzimmermann@...e.de>,
        Dmitry Osipenko <dmitry.osipenko@...labora.com>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>
Cc:     Alyssa Rosenzweig <alyssa@...enzweig.io>,
        Noralf Trønnes <noralf@...nnes.org>,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        asahi@...ts.linux.dev
Subject: Re: [PATCH] drm/shmem-helper: Fix locking for
 drm_gem_shmem_get_pages_sgt()

On 27/02/2023 17.04, Thomas Zimmermann wrote:
> Hi
> 
> Am 27.02.23 um 08:55 schrieb Asahi Lina:
>> On 27/02/2023 16.45, Thomas Zimmermann wrote:
>>> Hi
>>>
>>> Am 25.02.23 um 22:51 schrieb Dmitry Osipenko:
>>>> On 2/5/23 15:51, Asahi Lina wrote:
>>>>> -EXPORT_SYMBOL_GPL(drm_gem_shmem_get_pages_sgt);
>>>>> +EXPORT_SYMBOL(drm_gem_shmem_get_pages_sgt);
>>>>
>>>> Note it was a GPL symbol. I expect that all drm-shmem exports should be GPL.
>>>
>>> Right. I didn't notice that change, but it's probably not allowed. This
>>> needs to be reverted to a GPL export
>>
>> I'm sorry, this was not intentional! I think I removed and re-added the
>> export as part of making the wrapper and didn't notice it used to be _GPL...
>>
>> Do you want me to send a patch to add it back?
> 
> Yes, please do. The Fixes tag is
> 
>    Fixes: ddddedaa0db9 ("drm/shmem-helper: Fix locking for 
> drm_gem_shmem_get_pages_sgt()")
> 
> This commit is in drm-misc-next-fixes. But the branch is closed already 
> as we're in the middle of the merge window. I think it's best to merge 
> the fix through drm-misc-fixes after the -rc1 hs been tagged.

Sent! I also noticed that there are quite a few other non-GPL exports in
the file, with no real logic that I can see... I'm guessing most of
those weren't intentional either?

~~ Lina