CC: kbuild-...@lists.01.org TO: "Jules, Irenge," <jbi.oct...@gmail.com> CC: David Sterba <dste...@suse.com>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux.git for-5.8 head: 2166e5edce9ac1edf3b113d6091ef72fcac2d6c4 commit: 78d933c79cb649906577715af15400c7724ca633 [2/133] btrfs: add missing annotation for btrfs_tree_lock() :::::: branch date: 4 days ago :::::: commit date: 7 days ago config: x86_64-randconfig-s022-20200601 (attached as .config) compiler: gcc-9 (Debian 9.3.0-13) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.1-243-gc100a7ab-dirty git checkout 78d933c79cb649906577715af15400c7724ca633 # save the attached .config to linux build tree make W=1 C=1 ARCH=x86_64 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <l...@intel.com> sparse warnings: (new ones prefixed by >>) include/linux/kasan-checks.h:38:20: sparse: sparse: context imbalance in 'btrfs_set_lock_blocking_read' - unexpected unlock fs/btrfs/locking.c:232:41: sparse: sparse: context imbalance in 'btrfs_set_lock_blocking_write' - unexpected unlock fs/btrfs/locking.c:247:6: sparse: sparse: context imbalance in 'btrfs_tree_read_lock' - different lock contexts for basic block fs/btrfs/locking.c:288:5: sparse: sparse: context imbalance in 'btrfs_tree_read_lock_atomic' - different lock contexts for basic block fs/btrfs/locking.c:310:5: sparse: sparse: context imbalance in 'btrfs_try_tree_read_lock' - different lock contexts for basic block fs/btrfs/locking.c:335:5: sparse: sparse: context imbalance in 'btrfs_try_tree_write_lock' - different lock contexts for basic block include/linux/kasan-checks.h:38:20: sparse: sparse: context imbalance in 'btrfs_tree_read_unlock' - unexpected unlock fs/btrfs/locking.c:129:9: sparse: sparse: context imbalance in 'btrfs_tree_unlock' - unexpected unlock >> fs/btrfs/locking.c:534:22: sparse: sparse: context imbalance in >> 'btrfs_lock_root_node' - wrong count at exit # https://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux.git/commit/?id=78d933c79cb649906577715af15400c7724ca633 git remote add kdave https://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux.git git remote update kdave git checkout 78d933c79cb649906577715af15400c7724ca633 vim +/btrfs_lock_root_node +534 fs/btrfs/locking.c b908c334e7a419 David Sterba 2020-02-05 527 b908c334e7a419 David Sterba 2020-02-05 528 /* b908c334e7a419 David Sterba 2020-02-05 529 * Loop around taking references on and locking the root node of the tree until b908c334e7a419 David Sterba 2020-02-05 530 * we end up with a lock on the root node. b908c334e7a419 David Sterba 2020-02-05 531 * b908c334e7a419 David Sterba 2020-02-05 532 * Return: root extent buffer with write lock held b908c334e7a419 David Sterba 2020-02-05 533 */ b908c334e7a419 David Sterba 2020-02-05 @534 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root) b908c334e7a419 David Sterba 2020-02-05 535 { b908c334e7a419 David Sterba 2020-02-05 536 struct extent_buffer *eb; b908c334e7a419 David Sterba 2020-02-05 537 b908c334e7a419 David Sterba 2020-02-05 538 while (1) { b908c334e7a419 David Sterba 2020-02-05 539 eb = btrfs_root_node(root); b908c334e7a419 David Sterba 2020-02-05 540 btrfs_tree_lock(eb); b908c334e7a419 David Sterba 2020-02-05 541 if (eb == root->node) b908c334e7a419 David Sterba 2020-02-05 542 break; b908c334e7a419 David Sterba 2020-02-05 543 btrfs_tree_unlock(eb); b908c334e7a419 David Sterba 2020-02-05 544 free_extent_buffer(eb); b908c334e7a419 David Sterba 2020-02-05 545 } b908c334e7a419 David Sterba 2020-02-05 546 return eb; b908c334e7a419 David Sterba 2020-02-05 547 } b908c334e7a419 David Sterba 2020-02-05 548 :::::: The code at line 534 was first introduced by commit :::::: b908c334e7a419e5cd08a45d31284b4a93de3bd7 btrfs: move root node locking helpers to locking.c :::::: TO: David Sterba <dste...@suse.com> :::::: CC: David Sterba <dste...@suse.com> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-...@lists.01.org
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