kernel/bpf/dmabuf_iter.c:109:7-15: WARNING use flexible-array member instead (https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays)

kernel/bpf/dmabuf_iter.c:109:7-15: WARNING use flexible-array member instead (https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays)

[kernel test robot]

BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
CC: linux-kernel@vger.kernel.org
TO: "T.J. Mercier" <tjmercier@google.com>
CC: Alexei Starovoitov <ast@kernel.org>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   c369299895a591d96745d6492d4888259b004a9e
commit: 6eab7ac7c5eea7628b92cd5f9427bbd963a954ec bpf: Add open coded dmabuf iterator
date:   10 months ago
:::::: branch date: 20 hours ago
:::::: commit date: 10 months ago
config: s390-randconfig-r051-20260323 (https://download.01.org/0day-ci/archive/20260324/202603240106.OB40altv-lkp@intel.com/config)
compiler: clang version 23.0.0git (https://github.com/llvm/llvm-project c911b8492374942bf4cfe35411e90a35d3837f6a)

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>
| Reported-by: Julia Lawall <julia.lawall@inria.fr>
| Closes: https://lore.kernel.org/r/202603240106.OB40altv-lkp@intel.com/

cocci warnings: (new ones prefixed by >>)
>> kernel/bpf/dmabuf_iter.c:109:7-15: WARNING use flexible-array member instead (https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays)

vim +109 kernel/bpf/dmabuf_iter.c

6eab7ac7c5eea7 T.J. Mercier 2025-05-22  103  
6eab7ac7c5eea7 T.J. Mercier 2025-05-22  104  struct bpf_iter_dmabuf {
6eab7ac7c5eea7 T.J. Mercier 2025-05-22  105  	/*
6eab7ac7c5eea7 T.J. Mercier 2025-05-22  106  	 * opaque iterator state; having __u64 here allows to preserve correct
6eab7ac7c5eea7 T.J. Mercier 2025-05-22  107  	 * alignment requirements in vmlinux.h, generated from BTF
6eab7ac7c5eea7 T.J. Mercier 2025-05-22  108  	 */
6eab7ac7c5eea7 T.J. Mercier 2025-05-22 @109  	__u64 __opaque[1];
6eab7ac7c5eea7 T.J. Mercier 2025-05-22  110  } __aligned(8);
6eab7ac7c5eea7 T.J. Mercier 2025-05-22  111  

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

kernel/bpf/dmabuf_iter.c:109:7-15: WARNING use flexible-array member instead (https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays)

[kernel test robot]

BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
CC: linux-kernel@vger.kernel.org
TO: "T.J. Mercier" <tjmercier@google.com>
CC: Alexei Starovoitov <ast@kernel.org>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   a79a588fc1761dc12a3064fc2f648ae66cea3c5a
commit: 6eab7ac7c5eea7628b92cd5f9427bbd963a954ec bpf: Add open coded dmabuf iterator
date:   6 weeks ago
:::::: branch date: 14 hours ago
:::::: commit date: 6 weeks ago
config: powerpc-randconfig-r051-20250705 (https://download.01.org/0day-ci/archive/20250705/202507052244.abG9LXBW-lkp@intel.com/config)
compiler: powerpc-linux-gcc (GCC) 12.4.0

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>
| Reported-by: Julia Lawall <julia.lawall@inria.fr>
| Closes: https://lore.kernel.org/r/202507052244.abG9LXBW-lkp@intel.com/

cocci warnings: (new ones prefixed by >>)
>> kernel/bpf/dmabuf_iter.c:109:7-15: WARNING use flexible-array member instead (https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays)

vim +109 kernel/bpf/dmabuf_iter.c

6eab7ac7c5eea7 T.J. Mercier 2025-05-22  103  
6eab7ac7c5eea7 T.J. Mercier 2025-05-22  104  struct bpf_iter_dmabuf {
6eab7ac7c5eea7 T.J. Mercier 2025-05-22  105  	/*
6eab7ac7c5eea7 T.J. Mercier 2025-05-22  106  	 * opaque iterator state; having __u64 here allows to preserve correct
6eab7ac7c5eea7 T.J. Mercier 2025-05-22  107  	 * alignment requirements in vmlinux.h, generated from BTF
6eab7ac7c5eea7 T.J. Mercier 2025-05-22  108  	 */
6eab7ac7c5eea7 T.J. Mercier 2025-05-22 @109  	__u64 __opaque[1];
6eab7ac7c5eea7 T.J. Mercier 2025-05-22  110  } __aligned(8);
6eab7ac7c5eea7 T.J. Mercier 2025-05-22  111  

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki