Hi Andrew, FYI, the error/warning still remains. tree: https://github.com/omap-audio/linux-audio peter/ti-linux-5.4.y/wip head: d4ea716deb5cae567d7ffb483c1cc6a18ca0d3ba commit: d5ba15e3647df3f2bece61d36cca4a536939623b [7002/9999] dma-buf: heaps: Add Carveout heap to dmabuf heaps config: um-allmodconfig (attached as .config) compiler: gcc-9 (Debian 9.3.0-13) 9.3.0 reproduce (this is a W=1 build): git checkout d5ba15e3647df3f2bece61d36cca4a536939623b # save the attached .config to linux build tree make W=1 ARCH=um If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): /usr/bin/ld: arch/um/drivers/vde.o: in function `vde_open_real': (.text+0x9cb): warning: Using 'getgrnam' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking /usr/bin/ld: (.text+0x61d): warning: Using 'getpwuid' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking /usr/bin/ld: arch/um/drivers/vector_user.o: in function `user_init_socket_fds': vector_user.c:(.text+0x53a): warning: Using 'getaddrinfo' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking /usr/bin/ld: arch/um/drivers/pcap.o: in function `pcap_nametoaddr': (.text+0x10095): warning: Using 'gethostbyname' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking /usr/bin/ld: arch/um/drivers/pcap.o: in function `pcap_nametonetaddr': (.text+0x10155): warning: Using 'getnetbyname' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking /usr/bin/ld: arch/um/drivers/pcap.o: in function `pcap_nametoproto': (.text+0x10395): warning: Using 'getprotobyname' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking /usr/bin/ld: arch/um/drivers/pcap.o: in function `pcap_nametoport': (.text+0x1018b): warning: Using 'getservbyname' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking /usr/bin/ld: drivers/dma-buf/heaps/carveout-heap.o: in function `dma_heap_vunmap': /usr/bin/ld: drivers/dma-buf/heaps/carveout-heap.o: in function `dma_heap_vmap': /usr/bin/ld: drivers/dma-buf/heaps/carveout-heap.o: in function `dma_heap_dma_buf_release': carveout-heap.c:(.text+0x2f5): undefined reference to `memunmap' /usr/bin/ld: drivers/dma-buf/heaps/carveout-heap.o: in function `carveout_dma_heap_allocate': /usr/bin/ld: carveout-heap.c:(.text+0x88e): undefined reference to `gen_pool_free_owner' /usr/bin/ld: drivers/dma-buf/heaps/carveout-heap.o: in function `carveout_dma_heap_export': /usr/bin/ld: drivers/dma-buf/heaps/carveout-heap.o: in function `carveout_dma_heap_export.cold': collect2: error: ld returned 1 exit status --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org