drm_gem_dma_resv_wait
ret = drm_gem_dma_resv_wait(file, args->handle, true, timeout);
EXPORT_SYMBOL(drm_gem_dma_resv_wait);
ret = drm_gem_dma_resv_wait(file, handle, write, timeout);
ret = drm_gem_dma_resv_wait(file_priv, args->handle,
ret = drm_gem_dma_resv_wait(file_priv, args->handle,
long drm_gem_dma_resv_wait(struct drm_file *filep, u32 handle,