[asm-generic:asm-generic-uaccess-5 1/9] arch/csky/lib/usercopy.c:221:17: error: 'src' undeclared

[kernel test robot <lkp@intel.com>]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic.git asm-generic-uaccess-5
head:   569f7cb1d4f50aa497092e533d9d4044f5a87b58
commit: 3a68cb1dbf65aa5c86ae185e5c51c5c26c31a54a [1/9] asm-generic/uaccess.h: remove __strncpy_from_user/__strnlen_user
config: csky-defconfig (attached as .config)
compiler: csky-linux-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://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic.git/commit/?id=3a68cb1dbf65aa5c86ae185e5c51c5c26c31a54a
        git remote add asm-generic https://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic.git
        git fetch --no-tags asm-generic asm-generic-uaccess-5
        git checkout 3a68cb1dbf65aa5c86ae185e5c51c5c26c31a54a
        # 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=csky SHELL=/bin/bash

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

Note: the asm-generic/asm-generic-uaccess-5 HEAD 569f7cb1d4f50aa497092e533d9d4044f5a87b58 builds fine.
      It only hurts bisectibility.

All errors (new ones prefixed by >>):

   In file included from arch/csky/include/asm/uaccess.h:219,
                    from include/linux/uaccess.h:11,
                    from arch/csky/lib/usercopy.c:4:
   arch/csky/lib/usercopy.c: In function 'strnlen_user':
>> arch/csky/lib/usercopy.c:221:17: error: 'src' undeclared (first use in this function)
     221 |  if (!access_ok(src, 1))
         |                 ^~~
   include/asm-generic/uaccess.h:124:59: note: in definition of macro 'access_ok'
     124 | #define access_ok(addr, size) __access_ok((unsigned long)(addr),(size))
         |                                                           ^~~~
   arch/csky/lib/usercopy.c:221:17: note: each undeclared identifier is reported only once for each function it appears in
     221 |  if (!access_ok(src, 1))
         |                 ^~~
   include/asm-generic/uaccess.h:124:59: note: in definition of macro 'access_ok'
     124 | #define access_ok(addr, size) __access_ok((unsigned long)(addr),(size))
         |                                                           ^~~~


vim +/src +221 arch/csky/lib/usercopy.c

   205	
   206	/*
   207	 * strnlen_user: - Get the size of a string in user space.
   208	 * @str: The string to measure.
   209	 * @n:   The maximum valid length
   210	 *
   211	 * Get the size of a NUL-terminated string in user space.
   212	 *
   213	 * Returns the size of the string INCLUDING the terminating NUL.
   214	 * On exception, returns 0.
   215	 * If the string is too long, returns a value greater than @n.
   216	 */
   217	long strnlen_user(const char *s, long n)
   218	{
   219		unsigned long res, tmp;
   220	
 > 221		if (!access_ok(src, 1))
   222			return -EFAULT;
   223	
   224		__asm__ __volatile__(
   225		"       cmpnei  %1, 0           \n"
   226		"       bf      3f              \n"
   227		"1:     cmpnei  %0, 0           \n"
   228		"       bf      3f              \n"
   229		"2:     ldb     %3, (%1, 0)     \n"
   230		"       cmpnei  %3, 0           \n"
   231		"       bf      3f              \n"
   232		"       subi    %0,  1          \n"
   233		"       addi    %1,  1          \n"
   234		"       br      1b              \n"
   235		"3:     subu    %2, %0          \n"
   236		"       addi    %2,  1          \n"
   237		"       br      5f              \n"
   238		"4:     movi    %0, 0           \n"
   239		"       br      5f              \n"
   240		".section __ex_table, \"a\"     \n"
   241		".align   2                     \n"
   242		".long    2b, 4b                \n"
   243		".previous                      \n"
   244		"5:                             \n"
   245		: "=r"(n), "=r"(s), "=r"(res), "=r"(tmp)
   246		: "0"(n), "1"(s), "2"(n)
   247		: "memory");
   248	
   249		return res;
   250	}
   251	EXPORT_SYMBOL(strnlen_user);
   252	

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

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