linux-kernel - arch/xtensa/lib/kcsan-stubs.c:6:6: sparse: sparse: symbol '__atomic_store_8' was not declared. Should it be static?

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Date:   Wed, 22 Jun 2022 22:12:48 +0800
From:   kernel test robot <lkp@...el.com>
To:     Max Filippov <jcmvbkbc@...il.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: arch/xtensa/lib/kcsan-stubs.c:6:6: sparse: sparse: symbol
 '__atomic_store_8' was not declared. Should it be static?

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   ca1fdab7fd27eb069df1384b2850dcd0c2bebe8d
commit: 725aea873261e8d986e527838fde2a721f0962d8 xtensa: enable KCSAN
date:   7 weeks ago
config: xtensa-randconfig-s032-20220622 (https://download.01.org/0day-ci/archive/20220622/202206222246.W1MwwJo2-lkp@intel.com/config)
compiler: xtensa-linux-gcc (GCC) 11.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.4-31-g4880bd19-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=725aea873261e8d986e527838fde2a721f0962d8
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 725aea873261e8d986e527838fde2a721f0962d8
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=xtensa SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@...el.com>


sparse warnings: (new ones prefixed by >>)
>> arch/xtensa/lib/kcsan-stubs.c:6:6: sparse: sparse: symbol '__atomic_store_8' was not declared. Should it be static?
>> arch/xtensa/lib/kcsan-stubs.c:11:5: sparse: sparse: symbol '__atomic_load_8' was not declared. Should it be static?
>> arch/xtensa/lib/kcsan-stubs.c:16:5: sparse: sparse: symbol '__atomic_exchange_8' was not declared. Should it be static?
>> arch/xtensa/lib/kcsan-stubs.c:21:6: sparse: sparse: symbol '__atomic_compare_exchange_8' was not declared. Should it be static?
>> arch/xtensa/lib/kcsan-stubs.c:26:5: sparse: sparse: symbol '__atomic_fetch_add_8' was not declared. Should it be static?
>> arch/xtensa/lib/kcsan-stubs.c:31:5: sparse: sparse: symbol '__atomic_fetch_sub_8' was not declared. Should it be static?
>> arch/xtensa/lib/kcsan-stubs.c:36:5: sparse: sparse: symbol '__atomic_fetch_and_8' was not declared. Should it be static?
>> arch/xtensa/lib/kcsan-stubs.c:41:5: sparse: sparse: symbol '__atomic_fetch_or_8' was not declared. Should it be static?
>> arch/xtensa/lib/kcsan-stubs.c:46:5: sparse: sparse: symbol '__atomic_fetch_xor_8' was not declared. Should it be static?
>> arch/xtensa/lib/kcsan-stubs.c:51:5: sparse: sparse: symbol '__atomic_fetch_nand_8' was not declared. Should it be static?

vim +/__atomic_store_8 +6 arch/xtensa/lib/kcsan-stubs.c

     5	
   > 6	void __atomic_store_8(volatile void *p, u64 v, int i)
     7	{
     8		BUG();
     9	}
    10	
  > 11	u64 __atomic_load_8(const volatile void *p, int i)
    12	{
    13		BUG();
    14	}
    15	
  > 16	u64 __atomic_exchange_8(volatile void *p, u64 v, int i)
    17	{
    18		BUG();
    19	}
    20	
  > 21	bool __atomic_compare_exchange_8(volatile void *p1, void *p2, u64 v, bool b, int i1, int i2)
    22	{
    23		BUG();
    24	}
    25	
  > 26	u64 __atomic_fetch_add_8(volatile void *p, u64 v, int i)
    27	{
    28		BUG();
    29	}
    30	
  > 31	u64 __atomic_fetch_sub_8(volatile void *p, u64 v, int i)
    32	{
    33		BUG();
    34	}
    35	
  > 36	u64 __atomic_fetch_and_8(volatile void *p, u64 v, int i)
    37	{
    38		BUG();
    39	}
    40	
  > 41	u64 __atomic_fetch_or_8(volatile void *p, u64 v, int i)
    42	{
    43		BUG();
    44	}
    45	
  > 46	u64 __atomic_fetch_xor_8(volatile void *p, u64 v, int i)
    47	{
    48		BUG();
    49	}
    50	
  > 51	u64 __atomic_fetch_nand_8(volatile void *p, u64 v, int i)

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