[PATCH v8 4/8] drm/i915: drop unneeded make_unshrinkable in free_object

[Matthew Auld]

The comment here is no longer accurate, since the current shrinker code
requires a full ref before touching any objects. Also unset_pages()
should already do the required make_unshrinkable() for us, if needed,
which is also nicely balanced with set_pages().

Signed-off-by: Matthew Auld <matthew.auld at intel.com>
Cc: Thomas Hellström <thomas.hellstrom at linux.intel.com>
Reviewed-by: Thomas Hellström <thomas.hellstrom at linux.intel.com>
---
 drivers/gpu/drm/i915/gem/i915_gem_object.c | 9 ---------
 1 file changed, 9 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object.c b/drivers/gpu/drm/i915/gem/i915_gem_object.c
index 76ce6a1500bc..1dc3c1940c32 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_object.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_object.c
@@ -337,15 +337,6 @@ static void i915_gem_free_object(struct drm_gem_object *gem_obj)
 	 */
 	atomic_inc(&i915->mm.free_count);
 
-	/*
-	 * This serializes freeing with the shrinker. Since the free
-	 * is delayed, first by RCU then by the workqueue, we want the
-	 * shrinker to be able to free pages of unreferenced objects,
-	 * or else we may oom whilst there are plenty of deferred
-	 * freed objects.
-	 */
-	i915_gem_object_make_unshrinkable(obj);
-
 	/*
 	 * Since we require blocking on struct_mutex to unbind the freed
 	 * object from the GPU before releasing resources back to the
-- 
2.26.3