[Intel-gfx] [PATCH] drm/i915: Remove notion of GEM from i915_gem_shrinker_taints_mutex

* [Intel-gfx] [PATCH] drm/i915: Remove notion of GEM from i915_gem_shrinker_taints_mutex
@ 2021-02-02 15:29 Chris Wilson
  2021-02-02 15:33 ` Thomas Hellström
                   ` (2 more replies)
  0 siblings, 3 replies; 4+ messages in thread
From: Chris Wilson @ 2021-02-02 15:29 UTC (permalink / raw)
  To: intel-gfx; +Cc: Thomas Hellström, Chris Wilson

Since we dropped the use of dev->struct_mutex from inside the shrinker,
we no longer include that as part of our fs_reclaim tainting. We can
drop the i915 argument and rebrand it as a generic fs_reclaim tainter.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
---
 drivers/gpu/drm/i915/gem/i915_gem_object.c   |  3 +--
 drivers/gpu/drm/i915/gem/i915_gem_shrinker.c | 14 --------------
 drivers/gpu/drm/i915/gem/i915_gem_shrinker.h |  2 --
 drivers/gpu/drm/i915/gt/intel_gtt.c          |  2 +-
 drivers/gpu/drm/i915/gt/intel_reset.c        |  2 +-
 drivers/gpu/drm/i915/i915_utils.c            | 13 +++++++++++++
 drivers/gpu/drm/i915/i915_utils.h            |  2 ++
 7 files changed, 18 insertions(+), 20 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object.c b/drivers/gpu/drm/i915/gem/i915_gem_object.c
index 70f798405f7f..6cdff5fc5882 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_object.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_object.c
@@ -86,8 +86,7 @@ void i915_gem_object_init(struct drm_i915_gem_object *obj,
 	mutex_init(&obj->mm.get_dma_page.lock);
 
 	if (IS_ENABLED(CONFIG_LOCKDEP) && i915_gem_object_is_shrinkable(obj))
-		i915_gem_shrinker_taints_mutex(to_i915(obj->base.dev),
-					       &obj->mm.lock);
+		fs_reclaim_taints_mutex(&obj->mm.lock);
 }
 
 /**
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_shrinker.c b/drivers/gpu/drm/i915/gem/i915_gem_shrinker.c
index c2dba1cd9532..b64a0788381f 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_shrinker.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_shrinker.c
@@ -415,20 +415,6 @@ void i915_gem_driver_unregister__shrinker(struct drm_i915_private *i915)
 	unregister_shrinker(&i915->mm.shrinker);
 }
 
-void i915_gem_shrinker_taints_mutex(struct drm_i915_private *i915,
-				    struct mutex *mutex)
-{
-	if (!IS_ENABLED(CONFIG_LOCKDEP))
-		return;
-
-	fs_reclaim_acquire(GFP_KERNEL);
-
-	mutex_acquire(&mutex->dep_map, 0, 0, _RET_IP_);
-	mutex_release(&mutex->dep_map, _RET_IP_);
-
-	fs_reclaim_release(GFP_KERNEL);
-}
-
 #define obj_to_i915(obj__) to_i915((obj__)->base.dev)
 
 void i915_gem_object_make_unshrinkable(struct drm_i915_gem_object *obj)
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_shrinker.h b/drivers/gpu/drm/i915/gem/i915_gem_shrinker.h
index b397d7785789..a25754a51ac3 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_shrinker.h
+++ b/drivers/gpu/drm/i915/gem/i915_gem_shrinker.h
@@ -25,7 +25,5 @@ unsigned long i915_gem_shrink(struct drm_i915_private *i915,
 unsigned long i915_gem_shrink_all(struct drm_i915_private *i915);
 void i915_gem_driver_register__shrinker(struct drm_i915_private *i915);
 void i915_gem_driver_unregister__shrinker(struct drm_i915_private *i915);
-void i915_gem_shrinker_taints_mutex(struct drm_i915_private *i915,
-				    struct mutex *mutex);
 
 #endif /* __I915_GEM_SHRINKER_H__ */
diff --git a/drivers/gpu/drm/i915/gt/intel_gtt.c b/drivers/gpu/drm/i915/gt/intel_gtt.c
index 04aa6601e984..d34770ae4c9a 100644
--- a/drivers/gpu/drm/i915/gt/intel_gtt.c
+++ b/drivers/gpu/drm/i915/gt/intel_gtt.c
@@ -97,7 +97,7 @@ void i915_address_space_init(struct i915_address_space *vm, int subclass)
 	 */
 	mutex_init(&vm->mutex);
 	lockdep_set_subclass(&vm->mutex, subclass);
-	i915_gem_shrinker_taints_mutex(vm->i915, &vm->mutex);
+	fs_reclaim_taints_mutex(&vm->mutex);
 
 	GEM_BUG_ON(!vm->total);
 	drm_mm_init(&vm->mm, 0, vm->total);
diff --git a/drivers/gpu/drm/i915/gt/intel_reset.c b/drivers/gpu/drm/i915/gt/intel_reset.c
index c8cf3981ad7f..7638fb2a45f4 100644
--- a/drivers/gpu/drm/i915/gt/intel_reset.c
+++ b/drivers/gpu/drm/i915/gt/intel_reset.c
@@ -1401,7 +1401,7 @@ void intel_gt_init_reset(struct intel_gt *gt)
 	 * within the shrinker, we forbid ourselves from performing any
 	 * fs-reclaim or taking related locks during reset.
 	 */
-	i915_gem_shrinker_taints_mutex(gt->i915, &gt->reset.mutex);
+	fs_reclaim_taints_mutex(&gt->reset.mutex);
 
 	/* no GPU until we are ready! */
 	__set_bit(I915_WEDGED, &gt->reset.flags);
diff --git a/drivers/gpu/drm/i915/i915_utils.c b/drivers/gpu/drm/i915/i915_utils.c
index f9e780dee9de..90c7f0c4838c 100644
--- a/drivers/gpu/drm/i915/i915_utils.c
+++ b/drivers/gpu/drm/i915/i915_utils.c
@@ -114,3 +114,16 @@ void set_timer_ms(struct timer_list *t, unsigned long timeout)
 	/* Keep t->expires = 0 reserved to indicate a canceled timer. */
 	mod_timer(t, jiffies + timeout ?: 1);
 }
+
+void fs_reclaim_taints_mutex(struct mutex *mutex)
+{
+	if (!IS_ENABLED(CONFIG_LOCKDEP))
+		return;
+
+	fs_reclaim_acquire(GFP_KERNEL);
+
+	mutex_acquire(&mutex->dep_map, 0, 0, _RET_IP_);
+	mutex_release(&mutex->dep_map, _RET_IP_);
+
+	fs_reclaim_release(GFP_KERNEL);
+}
diff --git a/drivers/gpu/drm/i915/i915_utils.h b/drivers/gpu/drm/i915/i915_utils.h
index abd4dcd9f79c..3f616d00de42 100644
--- a/drivers/gpu/drm/i915/i915_utils.h
+++ b/drivers/gpu/drm/i915/i915_utils.h
@@ -266,6 +266,8 @@ static inline int list_is_last_rcu(const struct list_head *list,
 	return READ_ONCE(list->next) == head;
 }
 
+void fs_reclaim_taints_mutex(struct mutex *mutex);
+
 static inline unsigned long msecs_to_jiffies_timeout(const unsigned int m)
 {
 	unsigned long j = msecs_to_jiffies(m);
-- 
2.20.1

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