Hi Herbert,

[auto build test ERROR on net/master]
[also build test ERROR on v4.4 next-20160122]
[if your patch is applied to the wrong git tree, please drop us a note to help improving the system]

url:    https://github.com/0day-ci/linux/commits/Herbert-Xu/crypto-Use-skcipher-and-ahash-shash-where-possible/20160124-212323
config: x86_64-randconfig-x014-201604 (attached as .config)
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All errors (new ones prefixed by >>):

   net/xfrm/xfrm_algo.c: In function 'xfrm_probe_algs':
>> net/xfrm/xfrm_algo.c:787:12: error: implicit declaration of function 'crypto_has_ahash' [-Werror=implicit-function-declaration]
      status = crypto_has_ahash(aalg_list[i].name, 0, 0);
               ^
   cc1: some warnings being treated as errors

vim +/crypto_has_ahash +787 net/xfrm/xfrm_algo.c

   781	{
   782		int i, status;
   783	
   784		BUG_ON(in_softirq());
   785	
   786		for (i = 0; i < aalg_entries(); i++) {
 > 787			status = crypto_has_ahash(aalg_list[i].name, 0, 0);
   788			if (aalg_list[i].available != status)
   789				aalg_list[i].available = status;
   790		}

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