<def f='src/src/sys/external/bsd/drm2/include/linux/kref.h' l='60' ll='73' type='_Bool kref_get_unless_zero(struct kref * kref)'/>
<use f='src/src/sys/external/bsd/drm2/ttm/ttm_bo_vm.c' l='281' u='c' c='ttm_bo_uvm_lookup'/>
