warning: unstable feature specified for `-Ctarget-feature`: `backchain`
kernel test robot <[email protected]>
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 0e35b9b6ec0ffcc5e23cbdec09f5c622ad532b53 commit: 3f70ebe638581e73c8df6b3fa7eed9b45d90b083 s390: Enable Rust support date: 4 weeks ago config: s390-randconfig-001-20260707 (https://download.01.org/0day-ci/archive/20260707/[email protected]/config) compiler: clang version 21.1.8 (https://github.com/llvm/llvm-project 2078da43e25a4623cab2d0d60decddf709aaea28) rustc: rustc 1.96.0 (ac68faa20 2026-05-25) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260707/[email protected]/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 | Fixes: 3f70ebe63858 ("s390: Enable Rust support") | Reported-by: kernel test robot <[email protected]> | Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/ All warnings (new ones prefixed by >>): >> warning: unstable feature specified for `-Ctarget-feature`: `backchain` | = note: this feature is not stably supported; its behavior can change in the future -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki