CC: kbuild-...@lists.01.org TO: "David, Howells," <dhowe...@redhat.com>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git afs-operation head: 0295d9a491871fb70f3e5792955d8ae0801a7ae5 commit: 44f32d4b0c05e78ca628dc52f04d86ec98da1e95 [22/27] afs: Reorganise volume and server trees to be rooted on the cell :::::: branch date: 30 hours ago :::::: commit date: 30 hours ago config: parisc-randconfig-s031-20200531 (attached as .config) compiler: hppa-linux-gcc (GCC) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.1-243-gc100a7ab-dirty git checkout 44f32d4b0c05e78ca628dc52f04d86ec98da1e95 # save the attached .config to linux build tree make W=1 C=1 ARCH=parisc 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 >>) >> fs/afs/callback.c:74:38: sparse: sparse: context imbalance in >> 'afs_lookup_volume_rcu' - different lock contexts for basic block # https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git/commit/?id=44f32d4b0c05e78ca628dc52f04d86ec98da1e95 git remote add dhowells-fs https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git git remote update dhowells-fs git checkout 44f32d4b0c05e78ca628dc52f04d86ec98da1e95 vim +/afs_lookup_volume_rcu +74 fs/afs/callback.c ^1da177e4c3f41 Linus Torvalds 2005-04-16 58 fc7e32d8695359 David Howells 2020-03-27 59 /* 44f32d4b0c05e7 David Howells 2020-04-30 60 * Look up a volume by volume ID under RCU conditions. fc7e32d8695359 David Howells 2020-03-27 61 */ 44f32d4b0c05e7 David Howells 2020-04-30 62 static struct afs_volume *afs_lookup_volume_rcu(struct afs_cell *cell, fc7e32d8695359 David Howells 2020-03-27 63 afs_volid_t vid) fc7e32d8695359 David Howells 2020-03-27 64 { 44f32d4b0c05e7 David Howells 2020-04-30 65 struct afs_volume *volume = NULL; fc7e32d8695359 David Howells 2020-03-27 66 struct rb_node *p; fc7e32d8695359 David Howells 2020-03-27 67 int seq = 0; fc7e32d8695359 David Howells 2020-03-27 68 fc7e32d8695359 David Howells 2020-03-27 69 do { fc7e32d8695359 David Howells 2020-03-27 70 /* Unfortunately, rbtree walking doesn't give reliable results fc7e32d8695359 David Howells 2020-03-27 71 * under just the RCU read lock, so we have to check for fc7e32d8695359 David Howells 2020-03-27 72 * changes. fc7e32d8695359 David Howells 2020-03-27 73 */ 44f32d4b0c05e7 David Howells 2020-04-30 @74 read_seqbegin_or_lock(&cell->volume_lock, &seq); fc7e32d8695359 David Howells 2020-03-27 75 44f32d4b0c05e7 David Howells 2020-04-30 76 p = rcu_dereference_raw(cell->volumes.rb_node); fc7e32d8695359 David Howells 2020-03-27 77 while (p) { 44f32d4b0c05e7 David Howells 2020-04-30 78 volume = rb_entry(p, struct afs_volume, cell_node); fc7e32d8695359 David Howells 2020-03-27 79 44f32d4b0c05e7 David Howells 2020-04-30 80 if (volume->vid < vid) fc7e32d8695359 David Howells 2020-03-27 81 p = rcu_dereference_raw(p->rb_left); 44f32d4b0c05e7 David Howells 2020-04-30 82 else if (volume->vid > vid) fc7e32d8695359 David Howells 2020-03-27 83 p = rcu_dereference_raw(p->rb_right); fc7e32d8695359 David Howells 2020-03-27 84 else fc7e32d8695359 David Howells 2020-03-27 85 break; 44f32d4b0c05e7 David Howells 2020-04-30 86 volume = NULL; fc7e32d8695359 David Howells 2020-03-27 87 } fc7e32d8695359 David Howells 2020-03-27 88 44f32d4b0c05e7 David Howells 2020-04-30 89 } while (need_seqretry(&cell->volume_lock, seq)); fc7e32d8695359 David Howells 2020-03-27 90 44f32d4b0c05e7 David Howells 2020-04-30 91 done_seqretry(&cell->volume_lock, seq); 44f32d4b0c05e7 David Howells 2020-04-30 92 return volume; fc7e32d8695359 David Howells 2020-03-27 93 } fc7e32d8695359 David Howells 2020-03-27 94 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-...@lists.01.org
.config.gz
Description: application/gzip
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