tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 15bc20c6af4ceee97a1f90b43c0e386643c071b4 commit: a5460b5e5fb82656807840d40d3deaecad094044 READ_ONCE: Simplify implementations of {READ,WRITE}_ONCE() date: 4 months ago config: arm64-randconfig-s031-20200828 (attached as .config) compiler: aarch64-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: v0.6.2-191-g10164920-dirty git checkout a5460b5e5fb82656807840d40d3deaecad094044 # 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=arm64
If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <[email protected]> sparse warnings: (new ones prefixed by >>) drivers/gpu/drm/ttm/ttm_page_alloc_dma.c: note: in included file (through include/linux/rculist.h, include/linux/pid.h, include/linux/sched.h, ...): >> include/linux/list.h:35:9: sparse: sparse: context imbalance in >> 'ttm_dma_page_pool_fill_locked' - unexpected unlock # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a5460b5e5fb82656807840d40d3deaecad094044 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout a5460b5e5fb82656807840d40d3deaecad094044 vim +/ttm_dma_page_pool_fill_locked +35 include/linux/list.h ^1da177e4c3f415 Linus Torvalds 2005-04-16 22 ^1da177e4c3f415 Linus Torvalds 2005-04-16 23 #define LIST_HEAD(name) \ ^1da177e4c3f415 Linus Torvalds 2005-04-16 24 struct list_head name = LIST_HEAD_INIT(name) ^1da177e4c3f415 Linus Torvalds 2005-04-16 25 46deb7449d99f37 Paul E. McKenney 2019-11-09 26 /** 46deb7449d99f37 Paul E. McKenney 2019-11-09 27 * INIT_LIST_HEAD - Initialize a list_head structure 46deb7449d99f37 Paul E. McKenney 2019-11-09 28 * @list: list_head structure to be initialized. 46deb7449d99f37 Paul E. McKenney 2019-11-09 29 * 46deb7449d99f37 Paul E. McKenney 2019-11-09 30 * Initializes the list_head to point to itself. If it is a list header, 46deb7449d99f37 Paul E. McKenney 2019-11-09 31 * the result is an empty list. 46deb7449d99f37 Paul E. McKenney 2019-11-09 32 */ 490d6ab170c94a7 Zach Brown 2006-02-03 33 static inline void INIT_LIST_HEAD(struct list_head *list) 490d6ab170c94a7 Zach Brown 2006-02-03 34 { 2f073848c3cc8af Paul E. McKenney 2015-10-12 @35 WRITE_ONCE(list->next, list); 490d6ab170c94a7 Zach Brown 2006-02-03 36 list->prev = list; 490d6ab170c94a7 Zach Brown 2006-02-03 37 } ^1da177e4c3f415 Linus Torvalds 2005-04-16 38 :::::: The code at line 35 was first introduced by commit :::::: 2f073848c3cc8aff2655ab7c46d8c0de90cf4e50 list: Use WRITE_ONCE() when initializing list_head structures :::::: TO: Paul E. McKenney <[email protected]> :::::: CC: Paul E. McKenney <[email protected]> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/[email protected]
.config.gz
Description: application/gzip
