linux-kernel - mainline build failure for loongarch allmodconfig with gcc-12

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Message-ID: <YwSRFzQQKAXP2ncp@debian>
Date:   Tue, 23 Aug 2022 09:34:31 +0100
From:   "Sudip Mukherjee (Codethink)" <sudipm.mukherjee@...il.com>
To:     Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Tom Rix <trix@...hat.com>, Huacai Chen <chenhuacai@...nel.org>,
        WANG Xuerui <kernel@...0n.name>
Cc:     linux-kernel@...r.kernel.org, llvm@...ts.linux.dev,
        torvalds@...ux-foundation.org, loongarch@...ts.linux.dev
Subject: mainline build failure for loongarch allmodconfig with gcc-12

Hi All,

I have been trying to build loongarch as part of my nightly builds, and
I can build loongson3_defconfig without any error. But allmodconfig fails
with the error:

In function '__cmpxchg',
    inlined from 'ssh_seq_next' at drivers/platform/surface/aggregator/controller.c:61:9,
    inlined from 'ssam_request_write_data' at drivers/platform/surface/aggregator/controller.c:1483:8,
    inlined from 'ssam_request_sync_with_buffer' at drivers/platform/surface/aggregator/controller.c:1761:8:
././include/linux/compiler_types.h:354:45: error: call to '__compiletime_assert_9' declared with attribute error: BUILD_BUG failed
  354 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
      |                                             ^
././include/linux/compiler_types.h:335:25: note: in definition of macro '__compiletime_assert'
  335 |                         prefix ## suffix();                             \
      |                         ^~~~~~
././include/linux/compiler_types.h:354:9: note: in expansion of macro '_compiletime_assert'
  354 |         _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:83:17: note: in expansion of macro 'BUILD_BUG'
   83 |                 BUILD_BUG();
      |                 ^~~~~~~~~

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


-- 
Regards
Sudip