From 262ec4821d2ea2aa12add2e8ea847a2df9b9092c Mon Sep 17 00:00:00 2001
From: Emil Velikov <emil.velikov@collabora.com>
Date: Fri, 15 May 2020 10:50:50 +0100
Subject: drm/gem: fold drm_gem_object_put_unlocked and __drm_gem_object_put()
Git-commit: b5d250744cccfb40024de663ea1f4da04e6d959c
Patch-mainline: v5.9-rc1
References: jsc#SLE-12680, jsc#SLE-12880, jsc#SLE-12882, jsc#SLE-12883, jsc#SLE-13496, jsc#SLE-15322

With earlier patch we removed the overhead so now we can lift the helper
into the header effectively folding it with __drm_object_put.

v2: drop struct_mutex references (Daniel)

Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Acked-by: Sam Ravnborg <sam@ravnborg.org> (v1)
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20200515095118.2743122-11-emil.l.velikov@gmail.com
Signed-off-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 drivers/gpu/drm/drm_gem.c                  | 19 -------------------
 drivers/gpu/drm/i915/gem/i915_gem_object.h |  2 +-
 include/drm/drm_drv.h                      |  2 --
 include/drm/drm_gem.h                      | 16 +++-------------
 4 files changed, 4 insertions(+), 35 deletions(-)

diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c
index 12cf00043476..ced71abbe0e3 100644
--- a/drivers/gpu/drm/drm_gem.c
+++ b/drivers/gpu/drm/drm_gem.c
@@ -980,25 +980,6 @@ drm_gem_object_free(struct kref *kref)
 }
 EXPORT_SYMBOL(drm_gem_object_free);
 
-/**
- * drm_gem_object_put_unlocked - drop a GEM buffer object reference
- * @obj: GEM buffer object
- *
- * This releases a reference to @obj. Callers must not hold the
- * &drm_device.struct_mutex lock when calling this function.
- *
- * See also __drm_gem_object_put().
- */
-void
-drm_gem_object_put_unlocked(struct drm_gem_object *obj)
-{
-	if (!obj)
-		return;
-
-	kref_put(&obj->refcount, drm_gem_object_free);
-}
-EXPORT_SYMBOL(drm_gem_object_put_unlocked);
-
 /**
  * drm_gem_object_put - release a GEM buffer object reference
  * @obj: GEM buffer object
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object.h b/drivers/gpu/drm/i915/gem/i915_gem_object.h
index 2faa481cc18f..41351cbf31b5 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_object.h
+++ b/drivers/gpu/drm/i915/gem/i915_gem_object.h
@@ -105,7 +105,7 @@ __attribute__((nonnull))
 static inline void
 i915_gem_object_put(struct drm_i915_gem_object *obj)
 {
-	__drm_gem_object_put(&obj->base);
+	drm_gem_object_put_unlocked(&obj->base);
 }
 
 #define assert_object_held(obj) dma_resv_assert_held((obj)->base.resv)
diff --git a/include/drm/drm_drv.h b/include/drm/drm_drv.h
index e6eff508f687..bb924cddc09c 100644
--- a/include/drm/drm_drv.h
+++ b/include/drm/drm_drv.h
@@ -332,8 +332,6 @@ struct drm_driver {
 	 *
 	 * This is deprecated and should not be used by new drivers. Use
 	 * &drm_gem_object_funcs.free instead.
-	 * Compared to @gem_free_object this is not encumbered with
-	 * &drm_device.struct_mutex legacy locking schemes.
 	 */
 	void (*gem_free_object_unlocked) (struct drm_gem_object *obj);
 
diff --git a/include/drm/drm_gem.h b/include/drm/drm_gem.h
index ec2d24a60a76..c3bdade093ae 100644
--- a/include/drm/drm_gem.h
+++ b/include/drm/drm_gem.h
@@ -364,27 +364,17 @@ static inline void drm_gem_object_get(struct drm_gem_object *obj)
 }
 
 /**
- * __drm_gem_object_put - raw function to release a GEM buffer object reference
+ * drm_gem_object_put_unlocked - drop a GEM buffer object reference
  * @obj: GEM buffer object
  *
- * This function is meant to be used by drivers which are not encumbered with
- * &drm_device.struct_mutex legacy locking and which are using the
- * gem_free_object_unlocked callback. It avoids all the locking checks and
- * locking overhead of drm_gem_object_put() and drm_gem_object_put_unlocked().
- *
- * Drivers should never call this directly in their code. Instead they should
- * wrap it up into a ``driver_gem_object_put(struct driver_gem_object *obj)``
- * wrapper function, and use that. Shared code should never call this, to
- * avoid breaking drivers by accident which still depend upon
- * &drm_device.struct_mutex locking.
+ * This releases a reference to @obj.
  */
 static inline void
-__drm_gem_object_put(struct drm_gem_object *obj)
+drm_gem_object_put_unlocked(struct drm_gem_object *obj)
 {
 	kref_put(&obj->refcount, drm_gem_object_free);
 }
 
-void drm_gem_object_put_unlocked(struct drm_gem_object *obj);
 void drm_gem_object_put(struct drm_gem_object *obj);
 
 int drm_gem_handle_create(struct drm_file *file_priv,
-- 
2.29.2