Hi,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on linux/master]
[also build test ERROR on kbuild/for-next linus/master v5.10]
[cannot apply to tip/locking/core next-20201214]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/sylvain-bertrand-legeek-net/unlock-patched-C-gccs/20201215-021711
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 09162bc32c880a791c6c0668ce0745cf7958f576
config: arm-randconfig-r022-20201214 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project d38205144febf4dc42c9270c6aa3d978f1ef65e1)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install arm cross compiling tool for clang build
        # apt-get install binutils-arm-linux-gnueabi
        # https://github.com/0day-ci/linux/commit/2a8dfb33ffef5f529b5e6b728aa8f69024165f47
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review sylvain-bertrand-legeek-net/unlock-patched-C-gccs/20201215-021711
        git checkout 2a8dfb33ffef5f529b5e6b728aa8f69024165f47
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   In file included from scripts/mod/devicetable-offsets.c:3:
   In file included from include/linux/mod_devicetable.h:13:
   In file included from include/linux/uuid.h:12:
   In file included from include/linux/string.h:6:
   In file included from include/linux/compiler.h:246:
   In file included from ./arch/arm/include/generated/asm/rwonce.h:1:
>> include/asm-generic/rwonce.h:67:9: error: implicit declaration of function '__generic' [-Werror,-Wimplicit-function-declaration]
           return __READ_ONCE(*(unsigned long *)addr);
                  ^
   include/asm-generic/rwonce.h:44:42: note: expanded from macro '__READ_ONCE'
   #define __READ_ONCE(x)  (*(const volatile __unqual_scalar_typeof(x) *)&(x))
                                             ^
   include/linux/compiler_types.h:258:2: note: expanded from macro '__unqual_scalar_typeof'
           __generic((x), char, (char)0,                                   \
           ^
   In file included from scripts/mod/devicetable-offsets.c:3:
   In file included from include/linux/mod_devicetable.h:13:
   In file included from include/linux/uuid.h:12:
   In file included from include/linux/string.h:6:
   In file included from include/linux/compiler.h:246:
   In file included from ./arch/arm/include/generated/asm/rwonce.h:1:
>> include/asm-generic/rwonce.h:67:9: error: expected expression
   include/asm-generic/rwonce.h:44:42: note: expanded from macro '__READ_ONCE'
   #define __READ_ONCE(x)  (*(const volatile __unqual_scalar_typeof(x) *)&(x))
                                             ^
   include/linux/compiler_types.h:258:17: note: expanded from macro '__unqual_scalar_typeof'
           __generic((x), char, (char)0,                                   \
                          ^
   In file included from scripts/mod/devicetable-offsets.c:3:
   In file included from include/linux/mod_devicetable.h:13:
   In file included from include/linux/uuid.h:12:
   In file included from include/linux/string.h:6:
   In file included from include/linux/compiler.h:246:
   In file included from ./arch/arm/include/generated/asm/rwonce.h:1:
>> include/asm-generic/rwonce.h:67:9: error: expected expression
   include/asm-generic/rwonce.h:44:42: note: expanded from macro '__READ_ONCE'
   #define __READ_ONCE(x)  (*(const volatile __unqual_scalar_typeof(x) *)&(x))
                                             ^
   include/linux/compiler_types.h:259:17: note: expanded from macro '__unqual_scalar_typeof'
           __generic((x), unsigned char, (unsigned char)0,                 \
                          ^
   In file included from scripts/mod/devicetable-offsets.c:3:
   In file included from include/linux/mod_devicetable.h:13:
   In file included from include/linux/uuid.h:12:
   In file included from include/linux/string.h:6:
   In file included from include/linux/compiler.h:246:
   In file included from ./arch/arm/include/generated/asm/rwonce.h:1:
>> include/asm-generic/rwonce.h:67:9: error: expected expression
   include/asm-generic/rwonce.h:44:42: note: expanded from macro '__READ_ONCE'
   #define __READ_ONCE(x)  (*(const volatile __unqual_scalar_typeof(x) *)&(x))
                                             ^
   include/linux/compiler_types.h:260:17: note: expanded from macro '__unqual_scalar_typeof'
           __generic((x), signed char, (unsigned char)0,                   \
                          ^
   In file included from scripts/mod/devicetable-offsets.c:3:
   In file included from include/linux/mod_devicetable.h:13:
   In file included from include/linux/uuid.h:12:
   In file included from include/linux/string.h:6:
   In file included from include/linux/compiler.h:246:
   In file included from ./arch/arm/include/generated/asm/rwonce.h:1:
>> include/asm-generic/rwonce.h:67:9: error: expected expression
   include/asm-generic/rwonce.h:44:42: note: expanded from macro '__READ_ONCE'
   #define __READ_ONCE(x)  (*(const volatile __unqual_scalar_typeof(x) *)&(x))
                                             ^
   include/linux/compiler_types.h:261:17: note: expanded from macro '__unqual_scalar_typeof'
           __generic((x), unsigned short, (unsigned short)0,               \
                          ^
   In file included from scripts/mod/devicetable-offsets.c:3:
   In file included from include/linux/mod_devicetable.h:13:
   In file included from include/linux/uuid.h:12:
   In file included from include/linux/string.h:6:
   In file included from include/linux/compiler.h:246:
   In file included from ./arch/arm/include/generated/asm/rwonce.h:1:
>> include/asm-generic/rwonce.h:67:9: error: expected expression
   include/asm-generic/rwonce.h:44:42: note: expanded from macro '__READ_ONCE'
   #define __READ_ONCE(x)  (*(const volatile __unqual_scalar_typeof(x) *)&(x))
                                             ^
   include/linux/compiler_types.h:262:17: note: expanded from macro '__unqual_scalar_typeof'
           __generic((x), signed short, (signed short)0,                   \
                          ^
   In file included from scripts/mod/devicetable-offsets.c:3:
   In file included from include/linux/mod_devicetable.h:13:
   In file included from include/linux/uuid.h:12:
   In file included from include/linux/string.h:6:
   In file included from include/linux/compiler.h:246:
   In file included from ./arch/arm/include/generated/asm/rwonce.h:1:
>> include/asm-generic/rwonce.h:67:9: error: expected expression
   include/asm-generic/rwonce.h:44:42: note: expanded from macro '__READ_ONCE'
   #define __READ_ONCE(x)  (*(const volatile __unqual_scalar_typeof(x) *)&(x))
                                             ^
   include/linux/compiler_types.h:263:17: note: expanded from macro '__unqual_scalar_typeof'
           __generic((x), unsigned int, (unsigned int)0,                   \
                          ^
   In file included from scripts/mod/devicetable-offsets.c:3:
   In file included from include/linux/mod_devicetable.h:13:
   In file included from include/linux/uuid.h:12:
   In file included from include/linux/string.h:6:
   In file included from include/linux/compiler.h:246:
   In file included from ./arch/arm/include/generated/asm/rwonce.h:1:
>> include/asm-generic/rwonce.h:67:9: error: expected expression
   include/asm-generic/rwonce.h:44:42: note: expanded from macro '__READ_ONCE'
   #define __READ_ONCE(x)  (*(const volatile __unqual_scalar_typeof(x) *)&(x))
                                             ^
   include/linux/compiler_types.h:264:17: note: expanded from macro '__unqual_scalar_typeof'
           __generic((x), signed int, (signed int)0,                       \
                          ^
   In file included from scripts/mod/devicetable-offsets.c:3:
   In file included from include/linux/mod_devicetable.h:13:
   In file included from include/linux/uuid.h:12:
   In file included from include/linux/string.h:6:
   In file included from include/linux/compiler.h:246:
   In file included from ./arch/arm/include/generated/asm/rwonce.h:1:
>> include/asm-generic/rwonce.h:67:9: error: expected expression
   include/asm-generic/rwonce.h:44:42: note: expanded from macro '__READ_ONCE'
   #define __READ_ONCE(x)  (*(const volatile __unqual_scalar_typeof(x) *)&(x))
                                             ^
   include/linux/compiler_types.h:265:17: note: expanded from macro '__unqual_scalar_typeof'
           __generic((x), unsigned long, (unsigned long)0,                 \
                          ^
   In file included from scripts/mod/devicetable-offsets.c:3:
   In file included from include/linux/mod_devicetable.h:13:
   In file included from include/linux/uuid.h:12:
   In file included from include/linux/string.h:6:
   In file included from include/linux/compiler.h:246:
   In file included from ./arch/arm/include/generated/asm/rwonce.h:1:
>> include/asm-generic/rwonce.h:67:9: error: expected expression
   include/asm-generic/rwonce.h:44:42: note: expanded from macro '__READ_ONCE'
   #define __READ_ONCE(x)  (*(const volatile __unqual_scalar_typeof(x) *)&(x))
                                             ^
   include/linux/compiler_types.h:266:17: note: expanded from macro '__unqual_scalar_typeof'
           __generic((x), signed long, (signed long)0,                     \
                          ^
   In file included from scripts/mod/devicetable-offsets.c:3:
   In file included from include/linux/mod_devicetable.h:13:
   In file included from include/linux/uuid.h:12:
   In file included from include/linux/string.h:6:
   In file included from include/linux/compiler.h:246:
   In file included from ./arch/arm/include/generated/asm/rwonce.h:1:
>> include/asm-generic/rwonce.h:67:9: error: expected expression
   include/asm-generic/rwonce.h:44:42: note: expanded from macro '__READ_ONCE'
   #define __READ_ONCE(x)  (*(const volatile __unqual_scalar_typeof(x) *)&(x))
                                             ^
   include/linux/compiler_types.h:267:17: note: expanded from macro '__unqual_scalar_typeof'
           __generic((x), unsigned long long, (unsigned long long)0,       \
                          ^
   In file included from scripts/mod/devicetable-offsets.c:3:
   In file included from include/linux/mod_devicetable.h:13:
   In file included from include/linux/uuid.h:12:
   In file included from include/linux/string.h:6:
   In file included from include/linux/compiler.h:246:
   In file included from ./arch/arm/include/generated/asm/rwonce.h:1:
>> include/asm-generic/rwonce.h:67:9: error: expected expression
   include/asm-generic/rwonce.h:44:42: note: expanded from macro '__READ_ONCE'
   #define __READ_ONCE(x)  (*(const volatile __unqual_scalar_typeof(x) *)&(x))
                                             ^
   include/linux/compiler_types.h:268:17: note: expanded from macro '__unqual_scalar_typeof'
           __generic((x), signed long long, (signed long long)0,           \
                          ^
   12 errors generated.
   make[2]: *** [scripts/Makefile.build:117: scripts/mod/devicetable-offsets.s] Error 1
   make[2]: Target '__build' not remade because of errors.
   make[1]: *** [Makefile:1196: prepare0] Error 2
   make[1]: Target 'prepare' not remade because of errors.
   make: *** [Makefile:185: __sub-make] Error 2
   make: Target 'prepare' not remade because of errors.

vim +/__generic +67 include/asm-generic/rwonce.h

e506ea451254ab1 Will Deacon 2019-10-15  63  
e506ea451254ab1 Will Deacon 2019-10-15  64  static __no_sanitize_or_inline
e506ea451254ab1 Will Deacon 2019-10-15  65  unsigned long __read_once_word_nocheck(const void *addr)
e506ea451254ab1 Will Deacon 2019-10-15  66  {
e506ea451254ab1 Will Deacon 2019-10-15 @67  	return __READ_ONCE(*(unsigned long *)addr);
e506ea451254ab1 Will Deacon 2019-10-15  68  }
e506ea451254ab1 Will Deacon 2019-10-15  69  

---
0-DAY CI Kernel Test Service, Intel Corporation
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