Messages in this thread | | | Date | Sun, 5 Sep 2021 07:36:25 +0800 | From | kernel test robot <> | Subject | [linux-rt-devel:linux-5.14.y-rt-rebase 242/262] kernel/locking/spinlock_rt.c:249:13: warning: no previous prototype for function 'rt_rwlock_is_contended' |
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Hi Sebastian,
First bad commit (maybe != root cause):
tree: https://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-5.14.y-rt-rebase head: 654401743eaa08fb02fd57e7ca86dfeb16a8264f commit: 4e1854e1da111e0c0c6bf1969677f61abdbb4363 [242/262] x86: Allow to enable RT config: x86_64-buildonly-randconfig-r001-20210905 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 6fe2beba7d2a41964af658c8c59dd172683ef739) 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/rt/linux-rt-devel.git/commit/?id=4e1854e1da111e0c0c6bf1969677f61abdbb4363 git remote add linux-rt-devel https://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git git fetch --no-tags linux-rt-devel linux-5.14.y-rt-rebase git checkout 4e1854e1da111e0c0c6bf1969677f61abdbb4363 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64
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 >>):
>> kernel/locking/spinlock_rt.c:249:13: warning: no previous prototype for function 'rt_rwlock_is_contended' [-Wmissing-prototypes] int __sched rt_rwlock_is_contended(rwlock_t *rwlock) ^ kernel/locking/spinlock_rt.c:249:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int __sched rt_rwlock_is_contended(rwlock_t *rwlock) ^ static 1 warning generated.
vim +/rt_rwlock_is_contended +249 kernel/locking/spinlock_rt.c
ca72c3eba593af Thomas Gleixner 2021-08-15 248 ca72c3eba593af Thomas Gleixner 2021-08-15 @249 int __sched rt_rwlock_is_contended(rwlock_t *rwlock) ca72c3eba593af Thomas Gleixner 2021-08-15 250 { ca72c3eba593af Thomas Gleixner 2021-08-15 251 return rw_base_is_contended(&rwlock->rwbase); ca72c3eba593af Thomas Gleixner 2021-08-15 252 } ca72c3eba593af Thomas Gleixner 2021-08-15 253 EXPORT_SYMBOL(rt_rwlock_is_contended); ca72c3eba593af Thomas Gleixner 2021-08-15 254
:::::: The code at line 249 was first introduced by commit :::::: ca72c3eba593af8b6cce096b656c6cebd412d9b6 locking/rwlock: Provide RT variant
:::::: TO: Thomas Gleixner <tglx@linutronix.de> :::::: CC: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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