On Tue, Apr 15, 2025 at 9:43 PM kernel test robot lkp@intel.com wrote:
Hi Mercier,
kernel test robot noticed the following build errors:
[auto build test ERROR on bpf-next/net] [also build test ERROR on bpf-next/master bpf/master linus/master v6.15-rc2 next-20250415] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/T-J-Mercier/dma-buf-Rename-an... base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git net patch link: https://lore.kernel.org/r/20250414225227.3642618-3-tjmercier%40google.com patch subject: [PATCH 2/4] bpf: Add dmabuf iterator config: i386-buildonly-randconfig-005-20250416 compiler: clang version 20.1.2 (https://github.com/llvm/llvm-project 58df0ef89dd64126512e4ee27b4ac3fd8ddf6247) reproduce (this is a W=1 build):
If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot lkp@intel.com | Closes: https://lore.kernel.org/oe-kbuild-all/202504161015.x2XLaha2-lkp@intel.com/
All errors (new ones prefixed by >>):
ld.lld: error: undefined symbol: dmabuf_debugfs_list_mutex
referenced by dmabuf_iter.c:44 (kernel/bpf/dmabuf_iter.c:44) vmlinux.o:(dmabuf_iter_seq_next) referenced by dmabuf_iter.c:53 (kernel/bpf/dmabuf_iter.c:53) vmlinux.o:(dmabuf_iter_seq_next) referenced by dmabuf_iter.c:26 (kernel/bpf/dmabuf_iter.c:26) vmlinux.o:(dmabuf_iter_seq_start) referenced 1 more times
--
ld.lld: error: undefined symbol: dma_buf_put
referenced by dmabuf_iter.c:45 (kernel/bpf/dmabuf_iter.c:45) vmlinux.o:(dmabuf_iter_seq_next) referenced by dmabuf_iter.c:90 (kernel/bpf/dmabuf_iter.c:90) vmlinux.o:(dmabuf_iter_seq_stop)
--
ld.lld: error: undefined symbol: dmabuf_debugfs_list
referenced by list.h:354 (include/linux/list.h:354) vmlinux.o:(dmabuf_iter_seq_next) referenced by dmabuf_iter.c:0 (kernel/bpf/dmabuf_iter.c:0) vmlinux.o:(dmabuf_iter_seq_start) referenced by list.h:364 (include/linux/list.h:364) vmlinux.o:(dmabuf_iter_seq_start)
-- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
This is due to no CONFIG_DMA_SHARED_BUFFER. Fixed by:
--- a/kernel/bpf/Makefile +++ b/kernel/bpf/Makefile @@ -53,7 +53,7 @@ obj-$(CONFIG_BPF_SYSCALL) += relo_core.o obj-$(CONFIG_BPF_SYSCALL) += btf_iter.o obj-$(CONFIG_BPF_SYSCALL) += btf_relocate.o obj-$(CONFIG_BPF_SYSCALL) += kmem_cache_iter.o -ifeq ($(CONFIG_DEBUG_FS),y) +ifeq ($(CONFIG_DMA_SHARED_BUFFER)$(CONFIG_DEBUG_FS),yy) obj-$(CONFIG_BPF_SYSCALL) += dmabuf_iter.o endif