tree: https://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm.git dm-vdo-wip head: e64f626707d0a0b2908bf0d47705d755ada6fd2d commit: e64f626707d0a0b2908bf0d47705d755ada6fd2d [61/61] dm vdo: use a proper Makefile for dm-vdo config: loongarch-allmodconfig (https://download.01.org/0day-ci/archive/20231214/202312141731.XkQLyrNY-lkp@xxxxxxxxx/config) compiler: loongarch64-linux-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231214/202312141731.XkQLyrNY-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202312141731.XkQLyrNY-lkp@xxxxxxxxx/ All error/warnings (new ones prefixed by >>): In file included from drivers/md/dm-vdo/index.h:13, from drivers/md/dm-vdo/open-chapter.h:11, from drivers/md/dm-vdo/index-layout.c:15: >> drivers/md/dm-vdo/volume-index.h:29:18: warning: 'NO_CHAPTER' defined but not used [-Wunused-const-variable=] 29 | static const u64 NO_CHAPTER = U64_MAX; | ^~~~~~~~~~ -- drivers/md/dm-vdo/thread-registry.c: In function 'uds_register_thread': >> drivers/md/dm-vdo/thread-registry.c:32:28: error: 'current' undeclared (first use in this function) 32 | new_thread->task = current; | ^~~~~~~ drivers/md/dm-vdo/thread-registry.c:32:28: note: each undeclared identifier is reported only once for each function it appears in drivers/md/dm-vdo/thread-registry.c: In function 'uds_unregister_thread': drivers/md/dm-vdo/thread-registry.c:61:37: error: 'current' undeclared (first use in this function) 61 | if (thread->task == current) { | ^~~~~~~ drivers/md/dm-vdo/thread-registry.c: In function 'uds_lookup_thread': drivers/md/dm-vdo/thread-registry.c:84:37: error: 'current' undeclared (first use in this function) 84 | if (thread->task == current) { | ^~~~~~~ -- drivers/md/dm-vdo/vdo.c: In function 'vdo_make': >> drivers/md/dm-vdo/vdo.c:566:19: warning: '%s' directive output may be truncated writing up to 55 bytes into a region of size 16 [-Wformat-truncation=] 566 | "%s%u", MODULE_NAME, instance); | ^~ drivers/md/dm-vdo/vdo.c:565:9: note: 'snprintf' output between 2 and 66 bytes into a destination of size 16 565 | snprintf(vdo->thread_name_prefix, sizeof(vdo->thread_name_prefix), | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 566 | "%s%u", MODULE_NAME, instance); | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ vim +/current +32 drivers/md/dm-vdo/thread-registry.c c7d79fd21a2c37 Matthew Sakai 2023-11-16 22 c7d79fd21a2c37 Matthew Sakai 2023-11-16 23 /* Register the current thread and associate it with a data pointer. */ c7d79fd21a2c37 Matthew Sakai 2023-11-16 24 void uds_register_thread(struct thread_registry *registry, c7d79fd21a2c37 Matthew Sakai 2023-11-16 25 struct registered_thread *new_thread, const void *pointer) c7d79fd21a2c37 Matthew Sakai 2023-11-16 26 { c7d79fd21a2c37 Matthew Sakai 2023-11-16 27 struct registered_thread *thread; c7d79fd21a2c37 Matthew Sakai 2023-11-16 28 bool found_it = false; c7d79fd21a2c37 Matthew Sakai 2023-11-16 29 c7d79fd21a2c37 Matthew Sakai 2023-11-16 30 INIT_LIST_HEAD(&new_thread->links); c7d79fd21a2c37 Matthew Sakai 2023-11-16 31 new_thread->pointer = pointer; c7d79fd21a2c37 Matthew Sakai 2023-11-16 @32 new_thread->task = current; c7d79fd21a2c37 Matthew Sakai 2023-11-16 33 c7d79fd21a2c37 Matthew Sakai 2023-11-16 34 spin_lock(®istry->lock); c7d79fd21a2c37 Matthew Sakai 2023-11-16 35 list_for_each_entry(thread, ®istry->links, links) { c7d79fd21a2c37 Matthew Sakai 2023-11-16 36 if (thread->task == current) { c7d79fd21a2c37 Matthew Sakai 2023-11-16 37 /* There should be no existing entry. */ c7d79fd21a2c37 Matthew Sakai 2023-11-16 38 list_del_rcu(&thread->links); c7d79fd21a2c37 Matthew Sakai 2023-11-16 39 found_it = true; c7d79fd21a2c37 Matthew Sakai 2023-11-16 40 break; c7d79fd21a2c37 Matthew Sakai 2023-11-16 41 } c7d79fd21a2c37 Matthew Sakai 2023-11-16 42 } c7d79fd21a2c37 Matthew Sakai 2023-11-16 43 list_add_tail_rcu(&new_thread->links, ®istry->links); c7d79fd21a2c37 Matthew Sakai 2023-11-16 44 spin_unlock(®istry->lock); c7d79fd21a2c37 Matthew Sakai 2023-11-16 45 c7d79fd21a2c37 Matthew Sakai 2023-11-16 46 ASSERT_LOG_ONLY(!found_it, "new thread not already in registry"); c7d79fd21a2c37 Matthew Sakai 2023-11-16 47 if (found_it) { c7d79fd21a2c37 Matthew Sakai 2023-11-16 48 /* Ensure no RCU iterators see it before re-initializing. */ c7d79fd21a2c37 Matthew Sakai 2023-11-16 49 synchronize_rcu(); c7d79fd21a2c37 Matthew Sakai 2023-11-16 50 INIT_LIST_HEAD(&thread->links); c7d79fd21a2c37 Matthew Sakai 2023-11-16 51 } c7d79fd21a2c37 Matthew Sakai 2023-11-16 52 } c7d79fd21a2c37 Matthew Sakai 2023-11-16 53 :::::: The code at line 32 was first introduced by commit :::::: c7d79fd21a2c3776577f17e22747b38bb61b9563 dm vdo: add thread and synchronization utilities :::::: TO: Matthew Sakai <msakai@xxxxxxxxxx> :::::: CC: Mike Snitzer <snitzer@xxxxxxxxxx> -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
