tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 06aeb1495c39c86ccfaf1adadc1d2200179f16eb commit: 564eadc47f5f72d5fc25b3740452e4fb61cf694e [8608/9128] Maple Tree: Add new data structure config: mips-buildonly-randconfig-r005-20220225 (https://download.01.org/0day-ci/archive/20220226/202202262240.NbkCh7vR-lkp@xxxxxxxxx/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project d271fc04d5b97b12e6b797c6067d3c96a8d7470e) 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 # install mips cross compiling tool for clang build # apt-get install binutils-mips-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=564eadc47f5f72d5fc25b3740452e4fb61cf694e git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout 564eadc47f5f72d5fc25b3740452e4fb61cf694e # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=mips SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> lib/maple_tree.c:473:7: warning: variable 'shift' is used uninitialized whenever switch case is taken [-Wsometimes-uninitialized] case maple_dense: ^~~~~~~~~~~ lib/maple_tree.c:480:18: note: uninitialized use occurs here val |= (slot << shift) | type; ^~~~~ lib/maple_tree.c:474:7: warning: variable 'shift' is used uninitialized whenever switch case is taken [-Wsometimes-uninitialized] case maple_leaf_64: ^~~~~~~~~~~~~ lib/maple_tree.c:480:18: note: uninitialized use occurs here val |= (slot << shift) | type; ^~~~~ lib/maple_tree.c:463:21: note: initialize the variable 'shift' to silence this warning unsigned long shift; ^ = 0 >> lib/maple_tree.c:473:7: warning: variable 'type' is used uninitialized whenever switch case is taken [-Wsometimes-uninitialized] case maple_dense: ^~~~~~~~~~~ lib/maple_tree.c:480:27: note: uninitialized use occurs here val |= (slot << shift) | type; ^~~~ lib/maple_tree.c:474:7: warning: variable 'type' is used uninitialized whenever switch case is taken [-Wsometimes-uninitialized] case maple_leaf_64: ^~~~~~~~~~~~~ lib/maple_tree.c:480:27: note: uninitialized use occurs here val |= (slot << shift) | type; ^~~~ lib/maple_tree.c:464:20: note: initialize the variable 'type' to silence this warning unsigned long type; ^ = 0 lib/maple_tree.c:5547:6: warning: no previous prototype for function 'mas_wr_store_setup' [-Wmissing-prototypes] void mas_wr_store_setup(struct ma_wr_state *wr_mas) ^ lib/maple_tree.c:5547:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void mas_wr_store_setup(struct ma_wr_state *wr_mas) ^ static lib/maple_tree.c:6175:5: warning: no previous prototype for function 'mtree_alloc_range' [-Wmissing-prototypes] int mtree_alloc_range(struct maple_tree *mt, unsigned long *startp, ^ lib/maple_tree.c:6175:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int mtree_alloc_range(struct maple_tree *mt, unsigned long *startp, ^ static lib/maple_tree.c:6210:5: warning: no previous prototype for function 'mtree_alloc_rrange' [-Wmissing-prototypes] int mtree_alloc_rrange(struct maple_tree *mt, unsigned long *startp, ^ lib/maple_tree.c:6210:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int mtree_alloc_rrange(struct maple_tree *mt, unsigned long *startp, ^ static lib/maple_tree.c:76:28: warning: unused variable 'mt_max' [-Wunused-const-variable] static const unsigned long mt_max[] = { ^ lib/maple_tree.c:322:20: warning: unused function 'mte_set_full' [-Wunused-function] static inline void mte_set_full(const struct maple_enode *node) ^ lib/maple_tree.c:327:20: warning: unused function 'mte_clear_full' [-Wunused-function] static inline void mte_clear_full(const struct maple_enode *node) ^ lib/maple_tree.c:837:35: warning: unused function 'mas_get_slot' [-Wunused-function] static inline struct maple_enode *mas_get_slot(struct ma_state *mas, ^ lib/maple_tree.c:4599:19: warning: unused function 'mas_dead_node' [-Wunused-function] static inline int mas_dead_node(struct ma_state *mas, unsigned long index) ^ lib/maple_tree.c:4621:21: warning: unused function 'mas_first_entry' [-Wunused-function] static inline void *mas_first_entry(struct ma_state *mas, struct maple_node *mn, ^ 13 warnings generated. vim +/shift +473 lib/maple_tree.c 448 449 /* 450 * mte_set_parent() - Set the parent node and encode the slot 451 * @enode: The encoded maple node. 452 * @parent: The encoded maple node that is the parent of @enode. 453 * @slot: The slot that @enode resides in @parent. 454 * 455 * Slot number is encoded in the enode->parent bit 3-6 or 2-6, depending on the 456 * parent type. 457 */ 458 static inline 459 void mte_set_parent(struct maple_enode *enode, const struct maple_enode *parent, 460 unsigned char slot) 461 { 462 unsigned long val = (unsigned long) parent; 463 unsigned long shift; 464 unsigned long type; 465 enum maple_type p_type = mte_node_type(parent); 466 467 switch(p_type) { 468 case maple_range_64: 469 case maple_arange_64: 470 shift = MAPLE_PARENT_SLOT_SHIFT; 471 type = MAPLE_PARENT_RANGE64; 472 break; > 473 case maple_dense: 474 case maple_leaf_64: 475 BUG_ON(1); 476 break; 477 } 478 479 val &= ~MAPLE_NODE_MASK; /* Clear all node metadata in parent */ > 480 val |= (slot << shift) | type; 481 mte_to_node(enode)->parent = ma_parent_ptr(val); 482 } 483 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
