[asahilinux:asahi-wip 851/987] warning: associated items `as_ref` and `as_raw` are never used

[asahilinux:asahi-wip 851/987] warning: associated items `as_ref` and `as_raw` are never used

[kernel test robot]

tree:   https://github.com/AsahiLinux/linux asahi-wip
head:   0fcda52c969c6fe276e3f63f02438233ca592077
commit: 835791f8b49eaf3179ed9d8dd51f0efd00ab0648 [851/987] rust: Add dma_buf stub bindings
config: x86_64-rhel-9.4-rust (https://download.01.org/0day-ci/archive/20250806/202508060607.YkwmreFY-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
rustc: rustc 1.88.0 (6b00bc388 2025-06-23)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250806/202508060607.YkwmreFY-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/202508060607.YkwmreFY-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> warning: associated items `as_ref` and `as_raw` are never used
   --> rust/kernel/dma_buf.rs:31:26
   |
   23 | impl DmaBuf {
   | ----------- associated items in this implementation
   ...
   31 |     pub(crate) unsafe fn as_ref<'a>(self_ptr: *mut bindings::dma_buf) -> &'a Self {
   |                          ^^^^^^
   ...
   36 |     pub(crate) fn as_raw(&self) -> *mut bindings::dma_buf {
   |                   ^^^^^^
   |
   = note: `#[warn(dead_code)]` on by default

-- 
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https://github.com/intel/lkp-tests/wiki