drm2/ttm/ttm_bo_vm.c

103     int prot, vm_page_t *mres)
116 	if (*mres != NULL) {
117 		vm_page_lock(*mres);
118 		vm_page_remove(*mres);
119 		vm_page_unlock(*mres);
262 	if (*mres != NULL) {
263 		KASSERT(*mres != m, ("losing %p %p", *mres, m));
264 		vm_page_lock(*mres);
265 		vm_page_free(*mres);
266 		vm_page_unlock(*mres);
268 	*mres = m;