linux-kernel - lib/atomic64_test.c:107:2: error: implicit declaration of function 'atomic64_add

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Date:	Sun, 12 Jun 2016 01:52:19 +0800
From:	kbuild test robot <fengguang.wu@...el.com>
To:	unlisted-recipients:; (no To-header on input)
Cc:	kbuild-all@...org, linux-kernel@...r.kernel.org,
	"H. Peter Anvin" <hpa@...or.com>,
	Luca Barbieri <luca@...a-barbieri.com>
Subject: lib/atomic64_test.c:107:2: error: implicit declaration of function
 'atomic64_add_unless'

Hi,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   3d0f0b6a5520878305589411b8d434fe088e4f21
commit: 86a8938078a8bb518c5376de493e348c7490d506 lib: Add self-test for atomic64_t
date:   6 years ago
config: frv-allmodconfig (attached as .config)
compiler: frv-linux-gcc (GCC) 4.9.0
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 86a8938078a8bb518c5376de493e348c7490d506
        # save the attached .config to linux build tree
        make.cross ARCH=frv 

All errors (new ones prefixed by >>):

   lib/atomic64_test.c: In function 'test_atomic64':
>> lib/atomic64_test.c:107:2: error: implicit declaration of function 'atomic64_add_unless' [-Werror=implicit-function-declaration]
     BUG_ON(!atomic64_add_unless(&v, one, v0));
     ^
   lib/atomic64_test.c:116:2: error: implicit declaration of function 'atomic64_dec_if_positive' [-Werror=implicit-function-declaration]
     BUG_ON(atomic64_dec_if_positive(&v) != (onestwos - 1));
     ^
>> lib/atomic64_test.c:129:2: error: implicit declaration of function 'atomic64_inc_not_zero' [-Werror=implicit-function-declaration]
     BUG_ON(atomic64_inc_not_zero(&v));
     ^
   cc1: some warnings being treated as errors

vim +/atomic64_add_unless +107 lib/atomic64_test.c

   101	
   102		INIT(v0);
   103		BUG_ON(atomic64_cmpxchg(&v, v2, v1) != v0);
   104		BUG_ON(v.counter != r);
   105	
   106		INIT(v0);
 > 107		BUG_ON(!atomic64_add_unless(&v, one, v0));
   108		BUG_ON(v.counter != r);
   109	
   110		INIT(v0);
   111		BUG_ON(atomic64_add_unless(&v, one, v1));
   112		r += one;
   113		BUG_ON(v.counter != r);
   114	
   115		INIT(onestwos);
   116		BUG_ON(atomic64_dec_if_positive(&v) != (onestwos - 1));
   117		r -= one;
   118		BUG_ON(v.counter != r);
   119	
   120		INIT(0);
   121		BUG_ON(atomic64_dec_if_positive(&v) != -one);
   122		BUG_ON(v.counter != r);
   123	
   124		INIT(-one);
   125		BUG_ON(atomic64_dec_if_positive(&v) != (-one - one));
   126		BUG_ON(v.counter != r);
   127	
   128		INIT(onestwos);
 > 129		BUG_ON(atomic64_inc_not_zero(&v));
   130		r += one;
   131		BUG_ON(v.counter != r);
   132	

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