drm_framebuffer_read_refcount
if (drm_framebuffer_read_refcount(fb) > 1) {
drm_framebuffer_read_refcount(fb));
if (drm_framebuffer_read_refcount(fb) > 1) {
if (drm_framebuffer_read_refcount(fb) > 1) {
if (list_empty(&fb->filp_head) || drm_framebuffer_read_refcount(fb) > 1) {
drm_framebuffer_read_refcount(&fbdev_fb->base));
drm_framebuffer_read_refcount(&fb->base));
if (drm_framebuffer_read_refcount(fb))