[paulmckrcu:dev.2026.07.13b 75/86] warning: constant `WARN_ON_FLAGS` is never used

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

tree:   https://github.com/paulmckrcu/linux dev.2026.07.13b
head:   04b88652be5bc3b092a63198d1b2bebaf46b9e72
commit: f41634950050921c691e1fabdafc0304c2aedfdf [75/86] rust: sync: add SRCU abstraction
config: loongarch-allmodconfig (https://download.01.org/0day-ci/archive/20260719/202607190048.vAGhOcAV-lkp@intel.com/config)
compiler: clang version 19.1.7 (https://github.com/llvm/llvm-project cd708029e0b2869e80abe31ddb175f7c35361f90)
rustc: rustc 1.96.0 (ac68faa20 2026-05-25)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260719/202607190048.vAGhOcAV-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/202607190048.vAGhOcAV-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> warning: constant `WARN_ON_FLAGS` is never used
   --> rust/kernel/bug.rs:126:19
   |
   126 |               const WARN_ON_FLAGS: u32 = $crate::bug::bugflag_taint($crate::bindings::TAINT_WARN);
   |                     ^^^^^^^^^^^^^
   |
   ::: rust/kernel/sync/srcu.rs:106:12
   |
   106 |           if crate::warn_on!(
   |  ____________-
   107 | |             // SAFETY: By the type invariants, `self` contains a valid and pinned `struct srcu_struct`
   108 | |             // and `srcu_readers_active()` only checks the active reader count.
   109 | |             unsafe { bindings::srcu_readers_active(ptr) }
   110 | |         ) {
   | |_________- in this macro invocation
   |
   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
   = note: this warning originates in the macro `crate::warn_on` (in Nightly builds, run with -Z macro-backtrace for more info)

--
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