linux-kernel - Re: [PATCH v3 6/6] drm/shmem-helper: Switch to reservation lock

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Message-ID: <d813304a-cb9e-7e97-ebba-13b6126c6b9a@collabora.com>
Date:   Tue, 30 May 2023 01:05:47 +0300
From:   Dmitry Osipenko <dmitry.osipenko@...labora.com>
To:     Emil Velikov <emil.l.velikov@...il.com>
Cc:     Sumit Semwal <sumit.semwal@...aro.org>,
        Christian König <christian.koenig@....com>,
        Benjamin Gaignard <benjamin.gaignard@...labora.com>,
        Liam Mark <lmark@...eaurora.org>,
        Brian Starkey <Brian.Starkey@....com>,
        John Stultz <jstultz@...gle.com>,
        Gerd Hoffmann <kraxel@...hat.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        Arnd Bergmann <arnd@...db.de>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Tomi Valkeinen <tomba@...nel.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Tomasz Figa <tfiga@...omium.org>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, intel-gfx@...ts.freedesktop.org,
        linux-tegra@...r.kernel.org, kernel@...labora.com
Subject: Re: [PATCH v3 6/6] drm/shmem-helper: Switch to reservation lock

On 5/22/23 16:02, Emil Velikov wrote:
>> -void drm_gem_shmem_put_pages(struct drm_gem_shmem_object *shmem)
>> +static int drm_gem_shmem_pin_locked(struct drm_gem_shmem_object *shmem)
>> +{
>> +       int ret;
>> +
>> +       dma_resv_assert_held(shmem->base.resv);
>> +
>> +       ret = drm_gem_shmem_get_pages(shmem);
>> +
>> +       return ret;
> With the assert_held in the getter, it would be less confusing to
> inline this and the unpin_locked functions.

Sorry, missed this comment earlier. The reason why it's a separate
function is because there will be another caller once we'll add the
drm-shrinker.

-- 
Best regards,
Dmitry