linux-kernel - Re: [PATCH 2/4] bpf: Add dmabuf iterator

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Message-ID: <202504161015.x2XLaha2-lkp@intel.com>
Date: Wed, 16 Apr 2025 10:48:43 +0800
From: kernel test robot <lkp@...el.com>
To: "T.J. Mercier" <tjmercier@...gle.com>, sumit.semwal@...aro.org,
	christian.koenig@....com, ast@...nel.org, daniel@...earbox.net,
	andrii@...nel.org, martin.lau@...ux.dev, skhan@...uxfoundation.org
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
	linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
	dri-devel@...ts.freedesktop.org, linaro-mm-sig@...ts.linaro.org,
	linux-doc@...r.kernel.org, bpf@...r.kernel.org,
	linux-kselftest@...r.kernel.org, android-mm@...gle.com,
	simona@...ll.ch, corbet@....net, eddyz87@...il.com, song@...nel.org,
	yonghong.song@...ux.dev, john.fastabend@...il.com,
	kpsingh@...nel.org, sdf@...ichev.me, jolsa@...nel.org,
	mykolal@...com, "T.J. Mercier" <tjmercier@...gle.com>
Subject: Re: [PATCH 2/4] bpf: Add dmabuf iterator

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-and-expose-debugfs-symbols/20250415-065354
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@...el.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

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