Hi Kees,

I love your patch! Yet something to improve:

[auto build test ERROR on staging/staging-testing]
[also build test ERROR on linus/master v5.14-rc3]
[cannot apply to wireless-drivers-next/master wireless-drivers/master next-20210727]
[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/Kees-Cook/Introduce-strict-memcpy-bounds-checking/20210728-053749
base:   https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git 39f9137268ee3df0047706df4e9b7357a40ffc98
config: arm-randconfig-r031-20210727 (attached as .config)
compiler: arm-linux-gnueabi-gcc (GCC) 10.3.0
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
        # https://github.com/0day-ci/linux/commit/6617421fca0f2272593a2659a5cba25bf8249857
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Kees-Cook/Introduce-strict-memcpy-bounds-checking/20210728-053749
        git checkout 6617421fca0f2272593a2659a5cba25bf8249857
        # save the attached .config to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross O=build_dir ARCH=arm SHELL=/bin/bash

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 include/linux/string.h:253,
                    from arch/arm/boot/compressed/string.c:8:
>> include/linux/fortify-string.h:272:42: error: expected identifier or '(' before '{' token
     272 |         p_size_field, q_size_field, op) ({  \
         |                                          ^
   include/linux/fortify-string.h:283:26: note: in expansion of macro '__fortify_memcpy_chk'
     283 | #define memcpy(p, q, s)  __fortify_memcpy_chk(p, q, s,   \
         |                          ^~~~~~~~~~~~~~~~~~~~
   arch/arm/boot/compressed/string.c:29:7: note: in expansion of macro 'memcpy'
      29 | void *memcpy(void *__dest, __const void *__src, size_t __n)
         |       ^~~~~~


vim +272 include/linux/fortify-string.h

   270	
   271	#define __fortify_memcpy_chk(p, q, size, p_size, q_size,		\
 > 272				     p_size_field, q_size_field, op) ({		\
   273		size_t __fortify_size = (size_t)(size);				\
   274		fortify_memcpy_chk(__fortify_size, p_size, q_size,		\
   275				   p_size_field, q_size_field, #op);		\
   276		__underlying_##op(p, q, __fortify_size);			\
   277	})
   278	

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0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org