Re: [PATCH] rust: math: Add KernelMathExt trait with a mul_div helper

[kernel test robot]

Hi Michal,

kernel test robot noticed the following build errors:

[auto build test ERROR on 19272b37aa4f83ca52bdf9c16d5d81bdd1354494]

url:    https://github.com/intel-lab-lkp/linux/commits/Michal-Wilczynski/rust-math-Add-KernelMathExt-trait-with-a-mul_div-helper/20250610-055722
base:   19272b37aa4f83ca52bdf9c16d5d81bdd1354494
patch link:    https://lore.kernel.org/r/20250609-math-rust-v1-v1-1-285fac00031f%40samsung.com
patch subject: [PATCH] rust: math: Add KernelMathExt trait with a mul_div helper
config: x86_64-rhel-9.4-rust (https://download.01.org/0day-ci/archive/20250610/202506102043.Tvsj0sXM-lkp@xxxxxxxxx/config)
compiler: clang version 18.1.8 (https://github.com/llvm/llvm-project 3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff)
rustc: rustc 1.78.0 (9b00956e5 2024-04-29)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250610/202506102043.Tvsj0sXM-lkp@xxxxxxxxx/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@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202506102043.Tvsj0sXM-lkp@xxxxxxxxx/

All errors (new ones prefixed by >>):

>> error[E0425]: cannot find function `mul_u64_u64_div_u64` in crate `bindings`
   --> rust/kernel/math.rs:32:33
   |
   32 |         Some(unsafe { bindings::mul_u64_u64_div_u64(self, multiplier, divisor) })
   |                                 ^^^^^^^^^^^^^^^^^^^ not found in `bindings`

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