Hi Deepanshu, kernel test robot noticed the following build errors:
[auto build test ERROR on perf-tools-next/perf-tools-next] [also build test ERROR on tip/perf/core perf-tools/perf-tools linus/master v7.2 next-20260821] [cannot apply to acme/perf/core] [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#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Deepanshu-Kartikey/perf-bpf-Fix-lockless-access-to-parent_event-prog-in-perf_event_alloc/20260821-071210 base: https://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools-next.git perf-tools-next patch link: https://lore.kernel.org/r/20260821014210.18681-1-kartikey406%40gmail.com patch subject: [PATCH] perf/bpf: Fix lockless access to parent_event->prog in perf_event_alloc() config: arm-randconfig-004-20260825 (https://download.01.org/0day-ci/archive/20260825/[email protected]/config) compiler: arm-linux-gnueabi-gcc (GCC) 13.4.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260825/[email protected]/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 <[email protected]> | Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/ All errors (new ones prefixed by >>): arm-linux-gnueabi-ld: kernel/events/core.o: in function `__list_add': >> include/linux/list.h:159:(.text.perf_event_alloc.part.0+0x96c): undefined >> reference to `bpf_event_mutex' arm-linux-gnueabi-ld: drivers/pci/controller/cadence/pcie-cadence-plat.o: in function `cdns_plat_pcie_probe': drivers/pci/controller/cadence/pcie-cadence-plat.c:85:(.text.cdns_plat_pcie_probe+0xfc): undefined reference to `cdns_pcie_host_setup' vim +159 include/linux/list.h d7c816733d501b5 Kees Cook 2016-08-17 147 ^1da177e4c3f415 Linus Torvalds 2005-04-16 148 /* ^1da177e4c3f415 Linus Torvalds 2005-04-16 149 * Insert a new entry between two known consecutive entries. ^1da177e4c3f415 Linus Torvalds 2005-04-16 150 * ^1da177e4c3f415 Linus Torvalds 2005-04-16 151 * This is only for internal list manipulation where we know ^1da177e4c3f415 Linus Torvalds 2005-04-16 152 * the prev/next entries already! ^1da177e4c3f415 Linus Torvalds 2005-04-16 153 */ ^1da177e4c3f415 Linus Torvalds 2005-04-16 154 static inline void __list_add(struct list_head *new, ^1da177e4c3f415 Linus Torvalds 2005-04-16 155 struct list_head *prev, ^1da177e4c3f415 Linus Torvalds 2005-04-16 156 struct list_head *next) ^1da177e4c3f415 Linus Torvalds 2005-04-16 157 { d7c816733d501b5 Kees Cook 2016-08-17 158 if (!__list_add_valid(new, prev, next)) d7c816733d501b5 Kees Cook 2016-08-17 @159 return; d7c816733d501b5 Kees Cook 2016-08-17 160 ^1da177e4c3f415 Linus Torvalds 2005-04-16 161 next->prev = new; ^1da177e4c3f415 Linus Torvalds 2005-04-16 162 new->next = next; ^1da177e4c3f415 Linus Torvalds 2005-04-16 163 new->prev = prev; 1c97be677f72b3c Paul E. McKenney 2015-09-20 164 WRITE_ONCE(prev->next, new); ^1da177e4c3f415 Linus Torvalds 2005-04-16 165 } ^1da177e4c3f415 Linus Torvalds 2005-04-16 166 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
