[Intel-gfx] [PATCH 3/7] drm/i915: add dev_priv->mm.stolen_lock

[Chris Wilson]

On Wed, Jul 01, 2015 at 05:15:22PM -0300, Paulo Zanoni wrote:
> From: Paulo Zanoni <paulo.r.zanoni at intel.com>
> 
> Which should protect dev_priv->mm.stolen usage. This will allow us to
> simplify the relationship between stolen memory, FBC and struct_mutex.

Too coarse. The locking need only be around the stolen drm_mm, i.e. just
insert/remove node. (And you don't need the lock around drm_mm_initialized,
similarly teardown since like the init, they are serialised through
other means.)
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre