Hi Minchan, I love your patch! Yet something to improve: [auto build test ERROR on tip/master] [also build test ERROR on linux/master linus/master v5.16-rc1] [cannot apply to hnaz-mm/master tip/locking/core next-20211118] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Minchan-Kim/zsmalloc-remove-bit_... base: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git 8ab774587903771821b59471cc723bba6d893942 config: nds32-randconfig-r003-20211115 (attached as .config) compiler: nds32le-linux-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://github.com/0day-ci/linux/commit/c24db750268d85953fe12742e6e4a7b8b... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Minchan-Kim/zsmalloc-remove-bit_spin_lock/20211116-030720 git checkout c24db750268d85953fe12742e6e4a7b8baf16623 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=nds32 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): kernel/locking/spinlock.c:68:17: warning: no previous prototype for '__raw_spin_lock' [-Wmissing-prototypes] 68 | void __lockfunc __raw_##op##_lock(locktype##_t *lock) \ | ^~~~~~ kernel/locking/spinlock.c:126:1: note: in expansion of macro 'BUILD_LOCK_OPS' 126 | BUILD_LOCK_OPS(spin, raw_spinlock); | ^~~~~~~~~~~~~~ kernel/locking/spinlock.c:80:26: warning: no previous prototype for '__raw_spin_lock_irqsave' [-Wmissing-prototypes] 80 | unsigned long __lockfunc __raw_##op##_lock_irqsave(locktype##_t *lock) \ | ^~~~~~ kernel/locking/spinlock.c:126:1: note: in expansion of macro 'BUILD_LOCK_OPS' 126 | BUILD_LOCK_OPS(spin, raw_spinlock); | ^~~~~~~~~~~~~~ kernel/locking/spinlock.c:98:17: warning: no previous prototype for '__raw_spin_lock_irq' [-Wmissing-prototypes] 98 | void __lockfunc __raw_##op##_lock_irq(locktype##_t *lock) \ | ^~~~~~ kernel/locking/spinlock.c:126:1: note: in expansion of macro 'BUILD_LOCK_OPS' 126 | BUILD_LOCK_OPS(spin, raw_spinlock); | ^~~~~~~~~~~~~~ kernel/locking/spinlock.c:103:17: warning: no previous prototype for '__raw_spin_lock_bh' [-Wmissing-prototypes] 103 | void __lockfunc __raw_##op##_lock_bh(locktype##_t *lock) \ | ^~~~~~ kernel/locking/spinlock.c:126:1: note: in expansion of macro 'BUILD_LOCK_OPS' 126 | BUILD_LOCK_OPS(spin, raw_spinlock); | ^~~~~~~~~~~~~~ kernel/locking/spinlock.c:68:17: warning: no previous prototype for '__raw_read_lock' [-Wmissing-prototypes] 68 | void __lockfunc __raw_##op##_lock(locktype##_t *lock) \ | ^~~~~~ kernel/locking/spinlock.c:129:1: note: in expansion of macro 'BUILD_LOCK_OPS' 129 | BUILD_LOCK_OPS(read, rwlock); | ^~~~~~~~~~~~~~ kernel/locking/spinlock.c:80:26: warning: no previous prototype for '__raw_read_lock_irqsave' [-Wmissing-prototypes] 80 | unsigned long __lockfunc __raw_##op##_lock_irqsave(locktype##_t *lock) \ | ^~~~~~ kernel/locking/spinlock.c:129:1: note: in expansion of macro 'BUILD_LOCK_OPS' 129 | BUILD_LOCK_OPS(read, rwlock); | ^~~~~~~~~~~~~~ kernel/locking/spinlock.c:98:17: warning: no previous prototype for '__raw_read_lock_irq' [-Wmissing-prototypes] 98 | void __lockfunc __raw_##op##_lock_irq(locktype##_t *lock) \ | ^~~~~~ kernel/locking/spinlock.c:129:1: note: in expansion of macro 'BUILD_LOCK_OPS' 129 | BUILD_LOCK_OPS(read, rwlock); | ^~~~~~~~~~~~~~ kernel/locking/spinlock.c:103:17: warning: no previous prototype for '__raw_read_lock_bh' [-Wmissing-prototypes] 103 | void __lockfunc __raw_##op##_lock_bh(locktype##_t *lock) \ | ^~~~~~ kernel/locking/spinlock.c:129:1: note: in expansion of macro 'BUILD_LOCK_OPS' 129 | BUILD_LOCK_OPS(read, rwlock); | ^~~~~~~~~~~~~~ kernel/locking/spinlock.c:68:17: warning: no previous prototype for '__raw_write_lock' [-Wmissing-prototypes] 68 | void __lockfunc __raw_##op##_lock(locktype##_t *lock) \ | ^~~~~~ kernel/locking/spinlock.c:130:1: note: in expansion of macro 'BUILD_LOCK_OPS' 130 | BUILD_LOCK_OPS(write, rwlock); | ^~~~~~~~~~~~~~ kernel/locking/spinlock.c:80:26: warning: no previous prototype for '__raw_write_lock_irqsave' [-Wmissing-prototypes] 80 | unsigned long __lockfunc __raw_##op##_lock_irqsave(locktype##_t *lock) \ | ^~~~~~ kernel/locking/spinlock.c:130:1: note: in expansion of macro 'BUILD_LOCK_OPS' 130 | BUILD_LOCK_OPS(write, rwlock); | ^~~~~~~~~~~~~~ kernel/locking/spinlock.c:98:17: warning: no previous prototype for '__raw_write_lock_irq' [-Wmissing-prototypes] 98 | void __lockfunc __raw_##op##_lock_irq(locktype##_t *lock) \ | ^~~~~~ kernel/locking/spinlock.c:130:1: note: in expansion of macro 'BUILD_LOCK_OPS' 130 | BUILD_LOCK_OPS(write, rwlock); | ^~~~~~~~~~~~~~ kernel/locking/spinlock.c:103:17: warning: no previous prototype for '__raw_write_lock_bh' [-Wmissing-prototypes] 103 | void __lockfunc __raw_##op##_lock_bh(locktype##_t *lock) \ | ^~~~~~ kernel/locking/spinlock.c:130:1: note: in expansion of macro 'BUILD_LOCK_OPS' 130 | BUILD_LOCK_OPS(write, rwlock); | ^~~~~~~~~~~~~~ kernel/locking/spinlock.c: In function '_raw_write_lock_nested': 306 | __raw_write_lock_nested(lock, subclass); | ^~~~~~~~~~~~~~~~~~~~~~~ | _raw_write_lock_nested cc1: some warnings being treated as errors vim +306 kernel/locking/spinlock.c 303 304 void __lockfunc _raw_write_lock_nested(rwlock_t *lock, int subclass) 305 { 307 } 308 EXPORT_SYMBOL(_raw_write_lock_nested); 309 #endif 310 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org