On Fri, Feb 03, 2017 at 01:59:37AM +0800, kbuild test robot wrote: > Hi Okajima, > > [auto build test ERROR on tip/locking/core] > [also build test ERROR on v4.10-rc6 next-20170202] > [if your patch is applied to the wrong git tree, please drop us a note to > help improve the system] > > url: > https://github.com/0day-ci/linux/commits/J-R-Okajima/lockdep-consolidate-by-new-find_held_lock/20170203-010303 > config: x86_64-randconfig-x018-201705 (attached as .config) > compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901 > reproduce: > # save the attached .config to linux build tree > make ARCH=x86_64 > > All errors (new ones prefixed by >>): > > kernel/locking/rwsem.c: In function 'downgrade_write': > >> kernel/locking/rwsem.c:126:2: error: implicit declaration of function > >> 'lock_downgrade' [-Werror=implicit-function-declaration] > lock_downgrade(&sem->dep_map, _RET_IP_); > ^~~~~~~~~~~~~~ > >> kernel/locking/rwsem.c:126:21: error: 'struct rw_semaphore' has no member > >> named 'dep_map' > lock_downgrade(&sem->dep_map, _RET_IP_); > ^~ > cc1: some warnings being treated as errors > > vim +/lock_downgrade +126 kernel/locking/rwsem.c > > 120 > 121 /* > 122 * downgrade write lock to read lock > 123 */ > 124 void downgrade_write(struct rw_semaphore *sem) > 125 { > > 126 lock_downgrade(&sem->dep_map, _RET_IP_); > 127 > 128 rwsem_set_reader_owned(sem); > 129 __downgrade_write(sem);
This is what you need !LOCKDEP stubs for ;-)
