Hi Joe,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 
master
head:   d4690f1e1cdabb4d61207b6787b1605a0dc0aeab
commit: cb984d101b30eb7478d32df56a0023e4603cba7f compiler-gcc: integrate the 
various compiler-gcc[345].h files
date:   1 year, 3 months ago
config: frv-allmodconfig (attached as .config)
compiler: frv-linux-gcc (GCC) 6.2.0
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 cb984d101b30eb7478d32df56a0023e4603cba7f
        # save the attached .config to linux build tree
        make.cross ARCH=frv 

All errors (new ones prefixed by >>):

   In file included from include/linux/init.h:4:0,
                    from lib/atomic64_test.c:14:
   lib/atomic64_test.c: In function 'test_atomic64':
>> lib/atomic64_test.c:112:9: error: implicit declaration of function 
>> 'atomic64_add_unless' [-Werror=implicit-function-declaration]
     BUG_ON(atomic64_add_unless(&v, one, v0));
            ^
   include/linux/compiler.h:164:42: note: in definition of macro 'unlikely'
    # define unlikely(x) __builtin_expect(!!(x), 0)
                                             ^
   lib/atomic64_test.c:112:2: note: in expansion of macro 'BUG_ON'
     BUG_ON(atomic64_add_unless(&v, one, v0));
     ^~~~~~
   lib/atomic64_test.c:134:2: warning: #warning Please implement 
atomic64_dec_if_positive for your architecture and select the above Kconfig 
symbol [-Wcpp]
    #warning Please implement atomic64_dec_if_positive for your architecture 
and select the above Kconfig symbol
     ^~~~~~~
   In file included from include/linux/init.h:4:0,
                    from lib/atomic64_test.c:14:
>> lib/atomic64_test.c:138:10: error: implicit declaration of function 
>> 'atomic64_inc_not_zero' [-Werror=implicit-function-declaration]
     BUG_ON(!atomic64_inc_not_zero(&v));
             ^
   include/linux/compiler.h:164:42: note: in definition of macro 'unlikely'
    # define unlikely(x) __builtin_expect(!!(x), 0)
                                             ^
   lib/atomic64_test.c:138:2: note: in expansion of macro 'BUG_ON'
     BUG_ON(!atomic64_inc_not_zero(&v));
     ^~~~~~
   cc1: some warnings being treated as errors

vim +/atomic64_add_unless +112 lib/atomic64_test.c

86a893807 Luca Barbieri    2010-02-24    8   * the Free Software Foundation; 
either version 2 of the License, or
86a893807 Luca Barbieri    2010-02-24    9   * (at your option) any later 
version.
86a893807 Luca Barbieri    2010-02-24   10   */
b3b16d284 Fabian Frederick 2014-06-04   11  
b3b16d284 Fabian Frederick 2014-06-04   12  #define pr_fmt(fmt) KBUILD_MODNAME 
": " fmt
b3b16d284 Fabian Frederick 2014-06-04   13  
86a893807 Luca Barbieri    2010-02-24  @14  #include <linux/init.h>
50af5ead3 Paul Gortmaker   2012-01-20   15  #include <linux/bug.h>
0dbdd1bfe Peter Huewe      2010-05-24   16  #include <linux/kernel.h>
60063497a Arun Sharma      2011-07-26   17  #include <linux/atomic.h>
86a893807 Luca Barbieri    2010-02-24   18  
86a893807 Luca Barbieri    2010-02-24   19  #define INIT(c) do { 
atomic64_set(&v, c); r = c; } while (0)
86a893807 Luca Barbieri    2010-02-24   20  static __init int 
test_atomic64(void)
86a893807 Luca Barbieri    2010-02-24   21  {
86a893807 Luca Barbieri    2010-02-24   22      long long v0 = 
0xaaa31337c001d00dLL;
86a893807 Luca Barbieri    2010-02-24   23      long long v1 = 
0xdeadbeefdeafcafeLL;
86a893807 Luca Barbieri    2010-02-24   24      long long v2 = 
0xfaceabadf00df001LL;
86a893807 Luca Barbieri    2010-02-24   25      long long onestwos = 
0x1111111122222222LL;
86a893807 Luca Barbieri    2010-02-24   26      long long one = 1LL;
86a893807 Luca Barbieri    2010-02-24   27  
86a893807 Luca Barbieri    2010-02-24   28      atomic64_t v = 
ATOMIC64_INIT(v0);
86a893807 Luca Barbieri    2010-02-24   29      long long r = v0;
86a893807 Luca Barbieri    2010-02-24   30      BUG_ON(v.counter != r);
86a893807 Luca Barbieri    2010-02-24   31  
86a893807 Luca Barbieri    2010-02-24   32      atomic64_set(&v, v1);
86a893807 Luca Barbieri    2010-02-24   33      r = v1;
86a893807 Luca Barbieri    2010-02-24   34      BUG_ON(v.counter != r);
86a893807 Luca Barbieri    2010-02-24   35      BUG_ON(atomic64_read(&v) != r);
86a893807 Luca Barbieri    2010-02-24   36  
86a893807 Luca Barbieri    2010-02-24   37      INIT(v0);
86a893807 Luca Barbieri    2010-02-24   38      atomic64_add(onestwos, &v);
86a893807 Luca Barbieri    2010-02-24   39      r += onestwos;
86a893807 Luca Barbieri    2010-02-24   40      BUG_ON(v.counter != r);
86a893807 Luca Barbieri    2010-02-24   41  
86a893807 Luca Barbieri    2010-02-24   42      INIT(v0);
86a893807 Luca Barbieri    2010-02-24   43      atomic64_add(-one, &v);
86a893807 Luca Barbieri    2010-02-24   44      r += -one;
86a893807 Luca Barbieri    2010-02-24   45      BUG_ON(v.counter != r);
86a893807 Luca Barbieri    2010-02-24   46  
86a893807 Luca Barbieri    2010-02-24   47      INIT(v0);
86a893807 Luca Barbieri    2010-02-24   48      r += onestwos;
86a893807 Luca Barbieri    2010-02-24   49      
BUG_ON(atomic64_add_return(onestwos, &v) != r);
86a893807 Luca Barbieri    2010-02-24   50      BUG_ON(v.counter != r);
86a893807 Luca Barbieri    2010-02-24   51  
86a893807 Luca Barbieri    2010-02-24   52      INIT(v0);
86a893807 Luca Barbieri    2010-02-24   53      r += -one;
86a893807 Luca Barbieri    2010-02-24   54      
BUG_ON(atomic64_add_return(-one, &v) != r);
86a893807 Luca Barbieri    2010-02-24   55      BUG_ON(v.counter != r);
86a893807 Luca Barbieri    2010-02-24   56  
86a893807 Luca Barbieri    2010-02-24   57      INIT(v0);
86a893807 Luca Barbieri    2010-02-24   58      atomic64_sub(onestwos, &v);
86a893807 Luca Barbieri    2010-02-24   59      r -= onestwos;
86a893807 Luca Barbieri    2010-02-24   60      BUG_ON(v.counter != r);
86a893807 Luca Barbieri    2010-02-24   61  
86a893807 Luca Barbieri    2010-02-24   62      INIT(v0);
86a893807 Luca Barbieri    2010-02-24   63      atomic64_sub(-one, &v);
86a893807 Luca Barbieri    2010-02-24   64      r -= -one;
86a893807 Luca Barbieri    2010-02-24   65      BUG_ON(v.counter != r);
86a893807 Luca Barbieri    2010-02-24   66  
86a893807 Luca Barbieri    2010-02-24   67      INIT(v0);
86a893807 Luca Barbieri    2010-02-24   68      r -= onestwos;
86a893807 Luca Barbieri    2010-02-24   69      
BUG_ON(atomic64_sub_return(onestwos, &v) != r);
86a893807 Luca Barbieri    2010-02-24   70      BUG_ON(v.counter != r);
86a893807 Luca Barbieri    2010-02-24   71  
86a893807 Luca Barbieri    2010-02-24   72      INIT(v0);
86a893807 Luca Barbieri    2010-02-24   73      r -= -one;
86a893807 Luca Barbieri    2010-02-24   74      
BUG_ON(atomic64_sub_return(-one, &v) != r);
86a893807 Luca Barbieri    2010-02-24   75      BUG_ON(v.counter != r);
86a893807 Luca Barbieri    2010-02-24   76  
86a893807 Luca Barbieri    2010-02-24   77      INIT(v0);
86a893807 Luca Barbieri    2010-02-24   78      atomic64_inc(&v);
86a893807 Luca Barbieri    2010-02-24   79      r += one;
86a893807 Luca Barbieri    2010-02-24   80      BUG_ON(v.counter != r);
86a893807 Luca Barbieri    2010-02-24   81  
86a893807 Luca Barbieri    2010-02-24   82      INIT(v0);
86a893807 Luca Barbieri    2010-02-24   83      r += one;
86a893807 Luca Barbieri    2010-02-24   84      BUG_ON(atomic64_inc_return(&v) 
!= r);
86a893807 Luca Barbieri    2010-02-24   85      BUG_ON(v.counter != r);
86a893807 Luca Barbieri    2010-02-24   86  
86a893807 Luca Barbieri    2010-02-24   87      INIT(v0);
86a893807 Luca Barbieri    2010-02-24   88      atomic64_dec(&v);
86a893807 Luca Barbieri    2010-02-24   89      r -= one;
86a893807 Luca Barbieri    2010-02-24   90      BUG_ON(v.counter != r);
86a893807 Luca Barbieri    2010-02-24   91  
86a893807 Luca Barbieri    2010-02-24   92      INIT(v0);
86a893807 Luca Barbieri    2010-02-24   93      r -= one;
86a893807 Luca Barbieri    2010-02-24   94      BUG_ON(atomic64_dec_return(&v) 
!= r);
86a893807 Luca Barbieri    2010-02-24   95      BUG_ON(v.counter != r);
86a893807 Luca Barbieri    2010-02-24   96  
86a893807 Luca Barbieri    2010-02-24   97      INIT(v0);
86a893807 Luca Barbieri    2010-02-24   98      BUG_ON(atomic64_xchg(&v, v1) != 
v0);
86a893807 Luca Barbieri    2010-02-24   99      r = v1;
86a893807 Luca Barbieri    2010-02-24  100      BUG_ON(v.counter != r);
86a893807 Luca Barbieri    2010-02-24  101  
86a893807 Luca Barbieri    2010-02-24  102      INIT(v0);
86a893807 Luca Barbieri    2010-02-24  103      BUG_ON(atomic64_cmpxchg(&v, v0, 
v1) != v0);
86a893807 Luca Barbieri    2010-02-24  104      r = v1;
86a893807 Luca Barbieri    2010-02-24  105      BUG_ON(v.counter != r);
86a893807 Luca Barbieri    2010-02-24  106  
86a893807 Luca Barbieri    2010-02-24  107      INIT(v0);
86a893807 Luca Barbieri    2010-02-24  108      BUG_ON(atomic64_cmpxchg(&v, v2, 
v1) != v0);
86a893807 Luca Barbieri    2010-02-24  109      BUG_ON(v.counter != r);
86a893807 Luca Barbieri    2010-02-24  110  
86a893807 Luca Barbieri    2010-02-24  111      INIT(v0);
9efbcd590 Luca Barbieri    2010-03-01 @112      BUG_ON(atomic64_add_unless(&v, 
one, v0));
86a893807 Luca Barbieri    2010-02-24  113      BUG_ON(v.counter != r);
86a893807 Luca Barbieri    2010-02-24  114  
86a893807 Luca Barbieri    2010-02-24  115      INIT(v0);
9efbcd590 Luca Barbieri    2010-03-01  116      BUG_ON(!atomic64_add_unless(&v, 
one, v1));
86a893807 Luca Barbieri    2010-02-24  117      r += one;
86a893807 Luca Barbieri    2010-02-24  118      BUG_ON(v.counter != r);
86a893807 Luca Barbieri    2010-02-24  119  
7463449b8 Catalin Marinas  2012-07-30  120  #ifdef 
CONFIG_ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
86a893807 Luca Barbieri    2010-02-24  121      INIT(onestwos);
86a893807 Luca Barbieri    2010-02-24  122      
BUG_ON(atomic64_dec_if_positive(&v) != (onestwos - 1));
86a893807 Luca Barbieri    2010-02-24  123      r -= one;
86a893807 Luca Barbieri    2010-02-24  124      BUG_ON(v.counter != r);
86a893807 Luca Barbieri    2010-02-24  125  
86a893807 Luca Barbieri    2010-02-24  126      INIT(0);
86a893807 Luca Barbieri    2010-02-24  127      
BUG_ON(atomic64_dec_if_positive(&v) != -one);
86a893807 Luca Barbieri    2010-02-24  128      BUG_ON(v.counter != r);
86a893807 Luca Barbieri    2010-02-24  129  
86a893807 Luca Barbieri    2010-02-24  130      INIT(-one);
86a893807 Luca Barbieri    2010-02-24  131      
BUG_ON(atomic64_dec_if_positive(&v) != (-one - one));
86a893807 Luca Barbieri    2010-02-24  132      BUG_ON(v.counter != r);
8f4f202b3 Luca Barbieri    2010-02-26  133  #else
7463449b8 Catalin Marinas  2012-07-30  134  #warning Please implement 
atomic64_dec_if_positive for your architecture and select the above Kconfig 
symbol
8f4f202b3 Luca Barbieri    2010-02-26  135  #endif
86a893807 Luca Barbieri    2010-02-24  136  
86a893807 Luca Barbieri    2010-02-24  137      INIT(onestwos);
25a304f27 Luca Barbieri    2010-03-01 @138      
BUG_ON(!atomic64_inc_not_zero(&v));
86a893807 Luca Barbieri    2010-02-24  139      r += one;
86a893807 Luca Barbieri    2010-02-24  140      BUG_ON(v.counter != r);
86a893807 Luca Barbieri    2010-02-24  141  

:::::: The code at line 112 was first introduced by commit
:::::: 9efbcd590243045111670c171a951923b877b57d lib: Fix atomic64_add_unless 
test

:::::: TO: Luca Barbieri <l...@luca-barbieri.com>
:::::: CC: H. Peter Anvin <h...@zytor.com>

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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