[PATCH v2 0/6] omapdrm: struct_mutex removal

Tomi Valkeinen tomi.valkeinen at ti.com
Tue May 29 09:29:56 UTC 2018

On 25/05/18 19:39, Laurent Pinchart wrote:
> Hello,
> This patch series removes the usage of struct_mutex from the omapdrm driver in
> order to switch to gem_free_object_unlocked(). The series is inspired by
> Daniel Vetter's recent gem_free_object_unlocked() patches (starting with
> "[PATCH 1/5] staging/vboxvideo: Use gem_free_object_unlocked") and
> includes patches "[PATCH 4/5] drm/omapdrm: Fix mm_list locking" and
> "[PATCH] drm/omapdrm: Switch to gem_free_object_unlocked" (the latter
> modified due to the rebase).
> When reviewing Daniel's patches I noticed a potential issue in lock handling
> which prompted me to go and remove all usage of struct_mutex from the omapdrm
> driver. Instead of replacing it with a device-wide lock, I have decided to
> create per-GEM object locks as there is no need, as far as I can see, to
> serialize operations across separate GEM objects.
> The series starts with a bit of cleanup in the form of renaming (1/6) and
> refactoring (2/6), followed by removal of struct_mutex (3/6 and 4/6). It then
> ends with Daniel's patches that switch to gem_free_object_unlocked().
> The patches are based on top of the latest drm-misc. They have been tested on
> a Pandaboard.

Thanks! I'll queue these for v4.19 (I think we're a bit late for v4.18).


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