Subject: build failure of next-20221005 due to 9dcf746befa7 ("LoongArch: Use generic BUG() handler")

From: "Sudip Mukherjee (Codethink)" <[email-masked]>
Date: Wed, 5 Oct 2022 12:54:05 +0100

Hi All,

The builds of loongarch allmodconfig have failed to build next-20221005
with error:

./arch/loongarch/include/asm/cmpxchg.h: In function '__cmpxchg':
././include/linux/compiler_types.h:357:45: error: call to '__compiletime_assert_2' declared with attribute error: BUILD_BUG failed
  357 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
      |                                             ^
././include/linux/compiler_types.h:338:25: note: in definition of macro '__compiletime_assert'
  338 |                         prefix ## suffix();                             \
      |                         ^~~~~~
././include/linux/compiler_types.h:357:9: note: in expansion of macro '_compiletime_assert'
  357 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
      |         ^~~~~~~~~~~~~~~~~~~
./include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert'
   39 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
      |                                     ^~~~~~~~~~~~~~~~~~
./include/linux/build_bug.h:59:21: note: in expansion of macro 'BUILD_BUG_ON_MSG'
   59 | #define BUILD_BUG() BUILD_BUG_ON_MSG(1, "BUILD_BUG failed")
      |                     ^~~~~~~~~~~~~~~~
./arch/loongarch/include/asm/cmpxchg.h:179:17: note: in expansion of macro 'BUILD_BUG'
  179 |                 BUILD_BUG();
      |                 ^~~~~~~~~

git bisect pointed to 9dcf746befa7 ("LoongArch: Use generic BUG() handler")

I will be happy to test any patch or provide any extra log if needed.

-- 
Regards
Sudip