There is no reason to use mutex locking in pagefault handler.
Signed-off-by: Joonyoung Shim jy0922.shim@samsung.com --- drivers/gpu/drm/exynos/exynos_drm_gem.c | 5 ----- 1 file changed, 5 deletions(-)
diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.c b/drivers/gpu/drm/exynos/exynos_drm_gem.c index 752cb7c..4741226 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_gem.c +++ b/drivers/gpu/drm/exynos/exynos_drm_gem.c @@ -560,7 +560,6 @@ unlock: int exynos_drm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf) { struct drm_gem_object *obj = vma->vm_private_data; - struct drm_device *dev = obj->dev; unsigned long f_vaddr; pgoff_t page_offset; int ret; @@ -569,14 +568,10 @@ int exynos_drm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf) vma->vm_start) >> PAGE_SHIFT; f_vaddr = (unsigned long)vmf->virtual_address;
- mutex_lock(&dev->struct_mutex); - ret = exynos_drm_gem_map_buf(obj, vma, f_vaddr, page_offset); if (ret < 0) DRM_ERROR("failed to map a buffer with user.\n");
- mutex_unlock(&dev->struct_mutex); - switch (ret) { case 0: case -ERESTARTSYS: