tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git tty-test head: bb57c5de81c6feaad869acce7c38b1049115ac75 commit: bb57c5de81c6feaad869acce7c38b1049115ac75 [9/9] tty: move some internal tty lock enums and functions out of tty.h config: sparc64-randconfig-s032-20210407 (attached as .config) compiler: sparc64-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.3-279-g6d5d9b42-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git/commit/?id=bb57c5de81c6feaad869acce7c38b1049115ac75 git remote add driver-core https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git git fetch --no-tags driver-core tty-test git checkout bb57c5de81c6feaad869acce7c38b1049115ac75 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=sparc64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All errors (new ones prefixed by >>): In file included from include/linux/spinlock.h:59, from include/linux/wait.h:9, from include/linux/wait_bit.h:8, from include/linux/fs.h:6, from include/linux/tty.h:5, from drivers/tty/tty_buffer.c:8: drivers/tty/tty_buffer.c: In function 'tty_buffer_set_lock_subclass': >> drivers/tty/tty_buffer.c:604:40: error: 'TTY_LOCK_SLAVE' undeclared (first use in this function) 604 | lockdep_set_subclass(&port->buf.lock, TTY_LOCK_SLAVE); | ^~~~~~~~~~~~~~ include/linux/lockdep.h:233:71: note: in definition of macro 'lockdep_set_subclass' 233 | lockdep_init_map_waits(&(lock)->dep_map, #lock, (lock)->dep_map.key, sub,\ | ^~~ drivers/tty/tty_buffer.c:604:40: note: each undeclared identifier is reported only once for each function it appears in 604 | lockdep_set_subclass(&port->buf.lock, TTY_LOCK_SLAVE); | ^~~~~~~~~~~~~~ include/linux/lockdep.h:233:71: note: in definition of macro 'lockdep_set_subclass' 233 | lockdep_init_map_waits(&(lock)->dep_map, #lock, (lock)->dep_map.key, sub,\ | ^~~ -- In file included from include/linux/spinlock.h:59, from include/linux/wait.h:9, from include/linux/wait_bit.h:8, from include/linux/fs.h:6, from include/linux/tty.h:5, from drivers/tty/tty_mutex.c:2: drivers/tty/tty_mutex.c: In function 'tty_set_lock_subclass': >> drivers/tty/tty_mutex.c:59:43: error: 'TTY_LOCK_SLAVE' undeclared (first use in this function) 59 | lockdep_set_subclass(&tty->legacy_mutex, TTY_LOCK_SLAVE); | ^~~~~~~~~~~~~~ include/linux/lockdep.h:233:71: note: in definition of macro 'lockdep_set_subclass' 233 | lockdep_init_map_waits(&(lock)->dep_map, #lock, (lock)->dep_map.key, sub,\ | ^~~ drivers/tty/tty_mutex.c:59:43: note: each undeclared identifier is reported only once for each function it appears in 59 | lockdep_set_subclass(&tty->legacy_mutex, TTY_LOCK_SLAVE); | ^~~~~~~~~~~~~~ include/linux/lockdep.h:233:71: note: in definition of macro 'lockdep_set_subclass' 233 | lockdep_init_map_waits(&(lock)->dep_map, #lock, (lock)->dep_map.key, sub,\ | ^~~ Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for FRAME_POINTER Depends on DEBUG_KERNEL && (M68K || UML || SUPERH) || ARCH_WANT_FRAME_POINTERS || MCOUNT Selected by - LATENCYTOP && DEBUG_KERNEL && STACKTRACE_SUPPORT && PROC_FS && !MIPS && !PPC && !S390 && !MICROBLAZE && !ARM && !ARC && !X86 - LOCKDEP && DEBUG_KERNEL && LOCK_DEBUGGING_SUPPORT && !MIPS && !PPC && !ARM && !S390 && !MICROBLAZE && !ARC && !X86 vim +/TTY_LOCK_SLAVE +604 drivers/tty/tty_buffer.c 1d1d14da12e79a Peter Hurley 2015-01-17 600 1d1d14da12e79a Peter Hurley 2015-01-17 601 /* slave ptys can claim nested buffer lock when handling BRK and INTR */ 1d1d14da12e79a Peter Hurley 2015-01-17 602 void tty_buffer_set_lock_subclass(struct tty_port *port) 1d1d14da12e79a Peter Hurley 2015-01-17 603 { 1d1d14da12e79a Peter Hurley 2015-01-17 @604 lockdep_set_subclass(&port->buf.lock, TTY_LOCK_SLAVE); 1d1d14da12e79a Peter Hurley 2015-01-17 605 } e176058f0de53c Peter Hurley 2015-10-17 606 :::::: The code at line 604 was first introduced by commit :::::: 1d1d14da12e79a6c05fbe1a975401f0f56c93316 pty: Fix buffer flush deadlock :::::: TO: Peter Hurley :::::: CC: Greg Kroah-Hartman --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org