From: Rob Clark <robdclark@xxxxxxxxxxxx> Now that the inactive_list is protected by mm_lock, and everything else on per-obj basis is protected by obj->lock, we no longer depend on struct_mutex. Signed-off-by: Rob Clark <robdclark@xxxxxxxxxxxx> --- drivers/gpu/drm/msm/msm_gem.c | 1 - drivers/gpu/drm/msm/msm_gem_shrinker.c | 54 -------------------------- 2 files changed, 55 deletions(-) diff --git a/drivers/gpu/drm/msm/msm_gem.c b/drivers/gpu/drm/msm/msm_gem.c index 9cdac4f7228c..e749a1c6f4e0 100644 --- a/drivers/gpu/drm/msm/msm_gem.c +++ b/drivers/gpu/drm/msm/msm_gem.c @@ -654,7 +654,6 @@ void msm_gem_purge(struct drm_gem_object *obj, enum msm_gem_lock subclass) struct drm_device *dev = obj->dev; struct msm_gem_object *msm_obj = to_msm_bo(obj); - WARN_ON(!mutex_is_locked(&dev->struct_mutex)); WARN_ON(!is_purgeable(msm_obj, subclass)); WARN_ON(obj->import_attach); diff --git a/drivers/gpu/drm/msm/msm_gem_shrinker.c b/drivers/gpu/drm/msm/msm_gem_shrinker.c index 39a1b5327267..2c7bda1e2bf9 100644 --- a/drivers/gpu/drm/msm/msm_gem_shrinker.c +++ b/drivers/gpu/drm/msm/msm_gem_shrinker.c @@ -8,48 +8,13 @@ #include "msm_gem.h" #include "msm_gpu_trace.h" -static bool msm_gem_shrinker_lock(struct drm_device *dev, bool *unlock) -{ - /* NOTE: we are *closer* to being able to get rid of - * mutex_trylock_recursive().. the msm_gem code itself does - * not need struct_mutex, although codepaths that can trigger - * shrinker are still called in code-paths that hold the - * struct_mutex. - * - * Also, msm_obj->madv is protected by struct_mutex. - * - * The next step is probably split out a seperate lock for - * protecting inactive_list, so that shrinker does not need - * struct_mutex. - */ - switch (mutex_trylock_recursive(&dev->struct_mutex)) { - case MUTEX_TRYLOCK_FAILED: - return false; - - case MUTEX_TRYLOCK_SUCCESS: - *unlock = true; - return true; - - case MUTEX_TRYLOCK_RECURSIVE: - *unlock = false; - return true; - } - - BUG(); -} - static unsigned long msm_gem_shrinker_count(struct shrinker *shrinker, struct shrink_control *sc) { struct msm_drm_private *priv = container_of(shrinker, struct msm_drm_private, shrinker); - struct drm_device *dev = priv->dev; struct msm_gem_object *msm_obj; unsigned long count = 0; - bool unlock; - - if (!msm_gem_shrinker_lock(dev, &unlock)) - return 0; mutex_lock(&priv->mm_lock); @@ -60,9 +25,6 @@ msm_gem_shrinker_count(struct shrinker *shrinker, struct shrink_control *sc) mutex_unlock(&priv->mm_lock); - if (unlock) - mutex_unlock(&dev->struct_mutex); - return count; } @@ -71,13 +33,8 @@ msm_gem_shrinker_scan(struct shrinker *shrinker, struct shrink_control *sc) { struct msm_drm_private *priv = container_of(shrinker, struct msm_drm_private, shrinker); - struct drm_device *dev = priv->dev; struct msm_gem_object *msm_obj; unsigned long freed = 0; - bool unlock; - - if (!msm_gem_shrinker_lock(dev, &unlock)) - return SHRINK_STOP; mutex_lock(&priv->mm_lock); @@ -92,9 +49,6 @@ msm_gem_shrinker_scan(struct shrinker *shrinker, struct shrink_control *sc) mutex_unlock(&priv->mm_lock); - if (unlock) - mutex_unlock(&dev->struct_mutex); - if (freed > 0) trace_msm_gem_purge(freed << PAGE_SHIFT); @@ -106,13 +60,8 @@ msm_gem_shrinker_vmap(struct notifier_block *nb, unsigned long event, void *ptr) { struct msm_drm_private *priv = container_of(nb, struct msm_drm_private, vmap_notifier); - struct drm_device *dev = priv->dev; struct msm_gem_object *msm_obj; unsigned unmapped = 0; - bool unlock; - - if (!msm_gem_shrinker_lock(dev, &unlock)) - return NOTIFY_DONE; mutex_lock(&priv->mm_lock); @@ -130,9 +79,6 @@ msm_gem_shrinker_vmap(struct notifier_block *nb, unsigned long event, void *ptr) mutex_unlock(&priv->mm_lock); - if (unlock) - mutex_unlock(&dev->struct_mutex); - *(unsigned long *)ptr += unmapped; if (unmapped > 0) -- 2.26.2 _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel