[android-common:android17-6.18 15/15] warning: unsafe function's docs are missing a `# Safety` section

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

tree:   https://android.googlesource.com/kernel/common android17-6.18
head:   51015f38e9dca4ae0e4cdfd507558f2b438dd124
commit: 9d24b6e4b72a87704df6c39d7a9d8dd1cd9e41d5 [15/15] ANDROID: rust: Adds support for using a spinlock inside an IRQ handler.
config: x86_64-rhel-9.4-rust (https://download.01.org/0day-ci/archive/20261007/202610070006.ZzQeGIGv-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/20261007/202610070006.ZzQeGIGv-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/202610070006.ZzQeGIGv-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> warning: unsafe function's docs are missing a `# Safety` section
   --> rust/kernel/sync/lock/spinlock_irq.rs:128:5
   |
   128 |     unsafe fn assert_is_held(ptr: *mut bindings::spinlock_t) {
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/rust-1.96.0/index.html#missing_safety_doc
   = note: `-W clippy::missing-safety-doc` implied by `-W clippy::all`
   = help: to override `-W clippy::all` add `#[allow(clippy::missing_safety_doc)]`
--
>> warning: this lifetime isn't used in the impl
   --> rust/kernel/sync/lock/spinlock_irq.rs:147:6
   |
   147 | impl<'a, T> core::ops::Deref for SpinLockIrqGuard<'_, T> {
   |      ^^
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/rust-1.96.0/index.html#extra_unused_lifetimes
   = note: `-W clippy::extra-unused-lifetimes` implied by `-W clippy::all`
   = help: to override `-W clippy::all` add `#[allow(clippy::extra_unused_lifetimes)]`
--
>> warning: this lifetime isn't used in the impl
   --> rust/kernel/sync/lock/spinlock_irq.rs:157:6
   |
   157 | impl<'a, T> core::ops::DerefMut for SpinLockIrqGuard<'_, T> {
   |      ^^
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/rust-1.96.0/index.html#extra_unused_lifetimes
--
>> warning: unsafe function's docs are missing a `# Safety` section
   --> rust/kernel/sync/lock/spinlock_irq.rs:167:5
   |
   167 |     unsafe fn new(lock: &'a SpinLockIrq<T>) -> Self {
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/rust-1.96.0/index.html#missing_safety_doc

--
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