[android-common:android15-6.6 1/1] kernel/bpf/dmabuf_iter.c:128:29: warning: no previous prototype for 'bpf_iter_dmabuf_next'

[kernel test robot <lkp@intel.com>]

tree:   https://android.googlesource.com/kernel/common android15-6.6
head:   16aa689262af24cd0897f463b3d0dd9ecee6b37c
commit: 755db8b11c512ff80570c0a57821350f2ba67937 [1/1] BACKPORT: bpf: Add open coded dmabuf iterator
config: x86_64-allnoconfig-bpf (https://download.01.org/0day-ci/archive/20251221/202512211046.chAx6DtB-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251221/202512211046.chAx6DtB-lkp@intel.com/reproduce)

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/202512211046.chAx6DtB-lkp@intel.com/

All warnings (new ones prefixed by >>):

   kernel/bpf/dmabuf_iter.c:117:17: warning: no previous prototype for 'bpf_iter_dmabuf_new' [-Wmissing-prototypes]
     117 | __bpf_kfunc int bpf_iter_dmabuf_new(struct bpf_iter_dmabuf *it)
         |                 ^~~~~~~~~~~~~~~~~~~
>> kernel/bpf/dmabuf_iter.c:128:29: warning: no previous prototype for 'bpf_iter_dmabuf_next' [-Wmissing-prototypes]
     128 | __bpf_kfunc struct dma_buf *bpf_iter_dmabuf_next(struct bpf_iter_dmabuf *it)
         |                             ^~~~~~~~~~~~~~~~~~~~
>> kernel/bpf/dmabuf_iter.c:140:18: warning: no previous prototype for 'bpf_iter_dmabuf_destroy' [-Wmissing-prototypes]
     140 | __bpf_kfunc void bpf_iter_dmabuf_destroy(struct bpf_iter_dmabuf *it)
         |                  ^~~~~~~~~~~~~~~~~~~~~~~


vim +/bpf_iter_dmabuf_next +128 kernel/bpf/dmabuf_iter.c

   127	
 > 128	__bpf_kfunc struct dma_buf *bpf_iter_dmabuf_next(struct bpf_iter_dmabuf *it)
   129	{
   130		struct bpf_iter_dmabuf_kern *kit = (void *)it;
   131	
   132		if (kit->dmabuf)
   133			kit->dmabuf = dma_buf_iter_next(kit->dmabuf);
   134		else
   135			kit->dmabuf = dma_buf_iter_begin();
   136	
   137		return kit->dmabuf;
   138	}
   139	
 > 140	__bpf_kfunc void bpf_iter_dmabuf_destroy(struct bpf_iter_dmabuf *it)

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