From: Paulo Zanoni <paulo.r.zanoni@intel.com>
Date: Thu, 2 Jul 2015 22:25:09 +0000 (-0300)
Subject: drm/i915: add dev_priv->mm.stolen_lock
X-Git-Tag: omap-for-v4.3/fixes-rc1~89^2~36^2~89
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=92e97d2f47616b144feb86db489e134935b021b8;p=pandora-kernel.git

drm/i915: add dev_priv->mm.stolen_lock

Which should protect dev_priv->mm.stolen usage. This will allow us to
simplify the relationship between stolen memory, FBC and struct_mutex.

v2:
  - Rebase after the stolen_remove_node() dev_priv patch move.
  - I realized that after we fixed a few things related to the FBC CFB
    size checks, we're not reallocating the CFB anymore with FBC
    enabled, so we can just move all the locking to i915_gem_stolen.c
    and stop worrying about freezing all the stolen alocations while
    freeing/rellocating the CFB. This allows us to fix the "Too
    coarse" observation from Chris.

Suggested-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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