From 4e6b1e91253ebf701b4ec3586cba5596527a4d0a Mon Sep 17 00:00:00 2001 From: Eric Anholt Date: Tue, 25 Jul 2017 11:27:18 -0700 Subject: [PATCH] drm/vc4: Convert more lock requirement comments to lockdep assertions. Since I do my development with lockdep on, this will help make sure I don't introduce bugs here. Signed-off-by: Eric Anholt Link: https://patchwork.freedesktop.org/patch/msgid/20170725182718.31468-3-eric@anholt.net Reviewed-by: Daniel Vetter --- drivers/gpu/drm/vc4/vc4_bo.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/vc4/vc4_bo.c b/drivers/gpu/drm/vc4/vc4_bo.c index f4387e1e178d..b24dd8685590 100644 --- a/drivers/gpu/drm/vc4/vc4_bo.c +++ b/drivers/gpu/drm/vc4/vc4_bo.c @@ -163,10 +163,12 @@ static uint32_t bo_page_index(size_t size) return (size / PAGE_SIZE) - 1; } -/* Must be called with bo_lock held. */ static void vc4_bo_destroy(struct vc4_bo *bo) { struct drm_gem_object *obj = &bo->base.base; + struct vc4_dev *vc4 = to_vc4_dev(obj->dev); + + lockdep_assert_held(&vc4->bo_lock); vc4_bo_set_label(obj, -1); @@ -181,9 +183,11 @@ static void vc4_bo_destroy(struct vc4_bo *bo) drm_gem_cma_free_object(obj); } -/* Must be called with bo_lock held. */ static void vc4_bo_remove_from_cache(struct vc4_bo *bo) { + struct vc4_dev *vc4 = to_vc4_dev(bo->base.base.dev); + + lockdep_assert_held(&vc4->bo_lock); list_del(&bo->unref_head); list_del(&bo->size_head); } @@ -367,12 +371,13 @@ int vc4_dumb_create(struct drm_file *file_priv, return ret; } -/* Must be called with bo_lock held. */ static void vc4_bo_cache_free_old(struct drm_device *dev) { struct vc4_dev *vc4 = to_vc4_dev(dev); unsigned long expire_time = jiffies - msecs_to_jiffies(1000); + lockdep_assert_held(&vc4->bo_lock); + while (!list_empty(&vc4->bo_cache.time_list)) { struct vc4_bo *bo = list_last_entry(&vc4->bo_cache.time_list, struct vc4_bo, unref_head);