[tiwai-sound:test/sound-rust-v7.3 42/56] warning: `as` casting between raw pointers without changing their constness

[tiwai-sound:test/sound-rust-v7.3 42/56] warning: `as` casting between raw pointers without changing their constness

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git test/sound-rust-v7.3
head:   070444a8abf14da700680a5331d0a95cd11e578b
commit: b172ad8bf456b4d29c21afeebf24dba090c8a62e [42/56] rust: usb: Add safe mutable isochronous methods to Urb and UrbData
config: x86_64-rhel-9.4-rust (https://download.01.org/0day-ci/archive/20261106/202611062249.snPBEWys-lkp@intel.com/config)
compiler: clang version 22.1.8 (https://github.com/llvm/llvm-project ca7933e47d3a3451d81e72ac174dcb5aa28b59d1)
rustc: rustc 1.96.0 (ac68faa20 2026-05-25)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261106/202611062249.snPBEWys-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/202611062249.snPBEWys-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> warning: `as` casting between raw pointers without changing their constness
   --> rust/kernel/usb.rs:883:21
   |
   883 |                     urb.transfer_buffer as *mut u8,
   |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try `pointer::cast`, a safer alternative: `urb.transfer_buffer.cast::<u8>()`
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/rust-1.96.0/index.html#ptr_as_ptr
   = note: requested on the command line with `-W clippy::ptr-as-ptr`
--
>> warning: `as` casting between raw pointers without changing their constness
   --> rust/kernel/usb.rs:913:21
   |
   913 |                     urb.transfer_buffer as *mut u8,
   |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try `pointer::cast`, a safer alternative: `urb.transfer_buffer.cast::<u8>()`
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/rust-1.96.0/index.html#ptr_as_ptr
--
>> warning: `as` casting between raw pointers without changing their constness
   --> rust/kernel/usb.rs:982:24
   |
   982 |         unsafe { &mut *(self.urb.as_ptr() as *mut Urb<T>) }
   |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try `pointer::cast`, a safer alternative: `self.urb.as_ptr().cast::<Urb<T>>()`
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/rust-1.96.0/index.html#ptr_as_ptr

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