The semaphore at struct psb_mmu_driver.sem protects access to the MMU fields. Additional locking with struct psb_gtt.sem is unnecessary. Remove the field and related code.
Signed-off-by: Thomas Zimmermann tzimmermann@suse.de --- drivers/gpu/drm/gma500/gtt.c | 7 ------- drivers/gpu/drm/gma500/gtt.h | 1 - drivers/gpu/drm/gma500/psb_drv.c | 4 ---- 3 files changed, 12 deletions(-)
diff --git a/drivers/gpu/drm/gma500/gtt.c b/drivers/gpu/drm/gma500/gtt.c index 4202e88e5f84..c7b7cb1f2d13 100644 --- a/drivers/gpu/drm/gma500/gtt.c +++ b/drivers/gpu/drm/gma500/gtt.c @@ -125,12 +125,6 @@ void psb_gtt_remove_pages(struct drm_psb_private *pdev, const struct resource *r mutex_unlock(&pdev->gtt_mutex); }
-static void psb_gtt_alloc(struct drm_device *dev) -{ - struct drm_psb_private *dev_priv = to_drm_psb_private(dev); - init_rwsem(&dev_priv->gtt.sem); -} - void psb_gtt_takedown(struct drm_device *dev) { struct drm_psb_private *dev_priv = to_drm_psb_private(dev); @@ -166,7 +160,6 @@ int psb_gtt_init(struct drm_device *dev, int resume) if (!resume) { mutex_init(&dev_priv->gtt_mutex); mutex_init(&dev_priv->mmap_mutex); - psb_gtt_alloc(dev); }
pg = &dev_priv->gtt; diff --git a/drivers/gpu/drm/gma500/gtt.h b/drivers/gpu/drm/gma500/gtt.h index ff1dcdd1ff52..31500533ac45 100644 --- a/drivers/gpu/drm/gma500/gtt.h +++ b/drivers/gpu/drm/gma500/gtt.h @@ -22,7 +22,6 @@ struct psb_gtt { unsigned gatt_pages; unsigned long stolen_size; unsigned long vram_stolen_size; - struct rw_semaphore sem; };
/* Exported functions */ diff --git a/drivers/gpu/drm/gma500/psb_drv.c b/drivers/gpu/drm/gma500/psb_drv.c index eeb681be9c95..7227a8e44d23 100644 --- a/drivers/gpu/drm/gma500/psb_drv.c +++ b/drivers/gpu/drm/gma500/psb_drv.c @@ -184,13 +184,11 @@ static void psb_driver_unload(struct drm_device *dev) if (dev_priv->mmu) { struct psb_gtt *pg = &dev_priv->gtt;
- down_read(&pg->sem); psb_mmu_remove_pfn_sequence( psb_mmu_get_default_pd (dev_priv->mmu), pg->mmu_gatt_start, dev_priv->vram_stolen_size >> PAGE_SHIFT); - up_read(&pg->sem); psb_mmu_driver_takedown(dev_priv->mmu); dev_priv->mmu = NULL; } @@ -345,12 +343,10 @@ static int psb_driver_load(struct drm_device *dev, unsigned long flags) return ret;
/* Add stolen memory to SGX MMU */ - down_read(&pg->sem); ret = psb_mmu_insert_pfn_sequence(psb_mmu_get_default_pd(dev_priv->mmu), dev_priv->stolen_base >> PAGE_SHIFT, pg->gatt_start, pg->stolen_size >> PAGE_SHIFT, 0); - up_read(&pg->sem);
psb_mmu_set_pd_context(psb_mmu_get_default_pd(dev_priv->mmu), 0); psb_mmu_set_pd_context(dev_priv->pf_pd, 1);