[Intel-gfx] [PATCH 14/19] drm/i915: Reduce locking inside swfinish ioctl

[Joonas Lahtinen]

On to, 2016-08-04 at 20:52 +0100, Chris Wilson wrote:
> We only need to take the struct_mutex if the object is pinned to the
> display engine and so requires checking for clflush. (The race with
> userspace pinning the object to a framebuffer is irrelevant.)
> 
> v2: Use access once for compiler hints (or not as it is a bitfield)
> v3: READ_ONCE, obj->pin_display is not a bitfield anymore
> v4: Don't be creative with goto.
> 
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> Cc: Daniel Vetter <daniel.vetter at ffwll.ch>

This is readable, and it wasn't that hard.

Reviewed-by: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>

Regards, Joonas
-- 
Joonas Lahtinen
Open Source Technology Center
Intel Corporation