Re: [akpm-mm:mm-nonmm-unstable 32/32] ({ BUILDclang diag: _include/linux/compiler_attributes.h:138:56: warning: attribute 'error' is already applied with different arguments [-Wignored-attributes]B

[Kuan-Wei Chiu <visitorckw@gmail.com>]

On Mon, Jun 09, 2025 at 07:48:46AM +0800, kernel test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-nonmm-unstable
> head:   8172857ac52869c411762ce86802d127b0bb7546
> commit: 8172857ac52869c411762ce86802d127b0bb7546 [32/32] riscv: optimize gcd() performance on RISC-V without Zbb extension
> config: x86_64-buildonly-randconfig-001-20250609 (https://download.01.org/0day-ci/archive/20250609/202506090716.JryOipkx-lkp@intel.com/config)
> compiler: clang version 20.1.2 (https://github.com/llvm/llvm-project 58df0ef89dd64126512e4ee27b4ac3fd8ddf6247)
> rustc: rustc 1.78.0 (9b00956e5 2024-04-29)
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250609/202506090716.JryOipkx-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/202506090716.JryOipkx-lkp@intel.com/
> 
I wasn't able to reproduce the issue on the latest mm-nonmm-unstable
branch. However, after I manually applied the patch "[PATCH]
compiler_types: Remove unnecessary indirection in compiletime_assert()"
[1] on top of it, the issue appeared.

Since the patch pointed out by the test robot only touches RISC-V code,
and the issue shows up on x86, I believe it's reasonable to conclude
that the dropped compiler_types patch was the cause, rather than the
RISC-V gcd patch.

[1]: https://lore.kernel.org/lkml/20250607-compiletime_assert-v1-1-a8991a9be729@columbia.edu/

Regards,
Kuan-Wei