Re: [PATCH] atomic64: No need for CONFIG_ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE

kbuild test robot
2016-09-11T04:32:53Z

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Hi Vineet,

[auto build test ERROR on arm64/for-next/core]
[cannot apply to linus/master linux/master v4.8-rc5 next-20160909]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
[Suggest to use git(>=2.9.0) format-patch --base=<commit> (or --base=auto for convenience) to record what (public, well-known) commit your patch series was built on]
[Check https://git-scm.com/docs/git-format-patch for more information]

url: https://github.com/0day-ci/linux/commits/Vineet-Gupta/atomic64-No-need-for-CONFIG_ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE/20160909-013936
base: https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-next/core
config: ia64-allmodconfig (attached as .config)
compiler: ia64-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
# save the attached .config to linux build tree
make.cross ARCH=ia64

All errors (new ones prefixed by >>):

lib/atomic64_test.c: In function 'test_atomic64':
>> lib/atomic64_test.c:217:2: error: implicit declaration of function 'atomic64_dec_if_positive' [-Werror=implicit-function-declaration]
BUG_ON(atomic64_dec_if_positive(&v) != (onestwos - 1));
^
cc1: some warnings being treated as errors

vim +/atomic64_dec_if_positive +217 lib/atomic64_test.c

86a89380 Luca Barbieri 2010-02-24 211 INIT(v0);
9efbcd59 Luca Barbieri 2010-03-01 212 BUG_ON(!atomic64_add_unless(&v, one, v1));
86a89380 Luca Barbieri 2010-02-24 213 r += one;
86a89380 Luca Barbieri 2010-02-24 214 BUG_ON(v.counter != r);
86a89380 Luca Barbieri 2010-02-24 215
86a89380 Luca Barbieri 2010-02-24 216 INIT(onestwos);
86a89380 Luca Barbieri 2010-02-24 @217 BUG_ON(atomic64_dec_if_positive(&v) != (onestwos - 1));
86a89380 Luca Barbieri 2010-02-24 218 r -= one;
86a89380 Luca Barbieri 2010-02-24 219 BUG_ON(v.counter != r);
86a89380 Luca Barbieri 2010-02-24 220

:::::: The code at line 217 was first introduced by commit
:::::: 86a8938078a8bb518c5376de493e348c7490d506 lib: Add self-test for atomic64_t

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

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