On 10/04/24 13:56, Naresh Kamboju wrote:

The powerpc,s390, superSh and sparc tinyconfig builds failed due to following build warnings / errors on the Linux next-20240410 with gcc-13 and gcc-11.

List build failures:

• s390, build

  • gcc-13-tinyconfig - failed
  • gcc-8-tinyconfig - failed

• sh, build

  • gcc-11-tinyconfig - failed

• sparc, build

  • gcc-11-tinyconfig - failed

• mips, build

  • gcc-12-tinyconfig - failed
  • gcc-8-tinyconfig - failed

• powerpc, build

  • gcc-13-tinyconfig - failed
  • gcc-8-tinyconfig - failed

Reported-by: Linux Kernel Functional Testing lkft@linaro.org

Build log:

kernel/time/timekeeping.c: In function 'timekeeping_debug_get_ns': kernel/time/timekeeping.c:286:1: error: no return statement in function returning non-void [-Werror=return-type] 286 | } | ^ cc1: some warnings being treated as errors

Using unreachable() in the default BUG() seems to make this go away.

diff --git a/include/asm-generic/bug.h b/include/asm-generic/bug.h index 6e794420bd39..891bd9b0be70 100644 --- a/include/asm-generic/bug.h +++ b/include/asm-generic/bug.h @@ -156,7 +156,7 @@ extern __printf(1, 2) void __warn_printk(const char *fmt, ...);

#else /* !CONFIG_BUG */ #ifndef HAVE_ARCH_BUG -#define BUG() do {} while (1) +#define BUG() do { do {} while (1) ; unreachable(); } while (0) #endif

#ifndef HAVE_ARCH_BUG_ON

steps to reproduce:

# tuxmake --runtime podman --target-arch powerpc --toolchain gcc-13 --kconfig tinyconfig

Links:

• https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20240410/tes...
• https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20240410/tes...
• https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20240410/tes...

-- Linaro LKFT https://lkft.linaro.org