[linux-next:master 4291/4370] kernel/gcov/gcc_4_7.c:162:9: error: implicit declaration of function 'within_module'

[linux-next:master 4291/4370] kernel/gcov/gcc_4_7.c:162:9: error: implicit declaration of function 'within_module'

[kbuild test robot]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   1baf02ec984b88b435e2fa065300179a3f48e7d2
commit: 8c3d220cb6b5f502745285106154bad632f43b15 [4291/4370] gcov: clang support
config: x86_64-randconfig-u0-03291354 (attached as .config)
compiler: gcc-5 (Debian 5.5.0-3) 5.4.1 20171010
reproduce:
        git checkout 8c3d220cb6b5f502745285106154bad632f43b15
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All errors (new ones prefixed by >>):

   kernel/gcov/gcc_4_7.c: In function 'gcov_info_within_module':
>> kernel/gcov/gcc_4_7.c:162:9: error: implicit declaration of function 'within_module' [-Werror=implicit-function-declaration]
     return within_module((unsigned long)info, mod);
            ^
   cc1: some warnings being treated as errors

vim +/within_module +162 kernel/gcov/gcc_4_7.c

   152	
   153	/**
   154	 * gcov_info_within_module - check if a profiling data set belongs to a module
   155	 * @info: profiling data set
   156	 * @mod: module
   157	 *
   158	 * Returns true if profiling data belongs module, false otherwise.
   159	 */
   160	bool gcov_info_within_module(struct gcov_info *info, struct module *mod)
   161	{
 > 162		return within_module((unsigned long)info, mod);
   163	}
   164	

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