Messages in this thread | | | Date | Fri, 12 Nov 2021 07:08:19 +0800 | From | kernel test robot <> | Subject | lib/atomic64.c:82:5: warning: no previous prototype for 'generic_atomic64_and_return' |
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: debe436e77c72fcee804fb867f275e6d31aa999c commit: 1bdadf46eff6804ace5fa46b6856da4799f12b5c locking/atomic: atomic64: support ARCH_ATOMIC date: 6 months ago config: arc-randconfig-r032-20211109 (attached as .config) compiler: arc-elf-gcc (GCC) 11.2.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1bdadf46eff6804ace5fa46b6856da4799f12b5c git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 1bdadf46eff6804ace5fa46b6856da4799f12b5c # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=arc
If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
>> lib/atomic64.c:82:5: warning: no previous prototype for 'generic_atomic64_and_return' [-Wmissing-prototypes] 82 | s64 generic_atomic64_##op##_return(s64 a, atomic64_t *v) \ | ^~~~~~~~~~~~~~~~~ lib/atomic64.c:121:9: note: in expansion of macro 'ATOMIC64_OP_RETURN' 121 | ATOMIC64_OP_RETURN(op, c_op) \ | ^~~~~~~~~~~~~~~~~~ lib/atomic64.c:124:1: note: in expansion of macro 'ATOMIC64_OPS' 124 | ATOMIC64_OPS(and, &=) | ^~~~~~~~~~~~ >> lib/atomic64.c:82:5: warning: no previous prototype for 'generic_atomic64_or_return' [-Wmissing-prototypes] 82 | s64 generic_atomic64_##op##_return(s64 a, atomic64_t *v) \ | ^~~~~~~~~~~~~~~~~ lib/atomic64.c:121:9: note: in expansion of macro 'ATOMIC64_OP_RETURN' 121 | ATOMIC64_OP_RETURN(op, c_op) \ | ^~~~~~~~~~~~~~~~~~ lib/atomic64.c:125:1: note: in expansion of macro 'ATOMIC64_OPS' 125 | ATOMIC64_OPS(or, |=) | ^~~~~~~~~~~~ >> lib/atomic64.c:82:5: warning: no previous prototype for 'generic_atomic64_xor_return' [-Wmissing-prototypes] 82 | s64 generic_atomic64_##op##_return(s64 a, atomic64_t *v) \ | ^~~~~~~~~~~~~~~~~ lib/atomic64.c:121:9: note: in expansion of macro 'ATOMIC64_OP_RETURN' 121 | ATOMIC64_OP_RETURN(op, c_op) \ | ^~~~~~~~~~~~~~~~~~ lib/atomic64.c:126:1: note: in expansion of macro 'ATOMIC64_OPS' 126 | ATOMIC64_OPS(xor, ^=) | ^~~~~~~~~~~~
vim +/generic_atomic64_and_return +82 lib/atomic64.c
80 81 #define ATOMIC64_OP_RETURN(op, c_op) \ > 82 s64 generic_atomic64_##op##_return(s64 a, atomic64_t *v) \ 83 { \ 84 unsigned long flags; \ 85 raw_spinlock_t *lock = lock_addr(v); \ 86 s64 val; \ 87 \ 88 raw_spin_lock_irqsave(lock, flags); \ 89 val = (v->counter c_op a); \ 90 raw_spin_unlock_irqrestore(lock, flags); \ 91 return val; \ 92 } \ 93 EXPORT_SYMBOL(generic_atomic64_##op##_return); 94
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