3:08 a.m.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/josef/btrfs-next.git
locking-rework
head: ecc26315fec63c1ce9a1420cb6d9b6e0d0c4d7f5
commit: 061e82bf86d54d981acb307eff1fa114e71c3854 [16/18] btrfs: change our extent buffer
lock to a rw_semaphore
config: h8300-randconfig-s032-20200810 (attached as .config)
compiler: h8300-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: v0.6.2-141-g19506bc2-dirty
git checkout 061e82bf86d54d981acb307eff1fa114e71c3854
# 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=h8300
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com>
sparse warnings: (new ones prefixed by >>)
> fs/btrfs/locking.c:204:6: sparse: sparse: context imbalance in
'__btrfs_tree_lock' - wrong count at exit
fs/btrfs/locking.c:217:6:
sparse: sparse: context imbalance in 'btrfs_tree_lock' - wrong count at exit
vim +/__btrfs_tree_lock +204 fs/btrfs/locking.c
b4ce94de9b4d64 Chris Mason 2009-02-04 196
b4ce94de9b4d64 Chris Mason 2009-02-04 197 /*
061e82bf86d54d Josef Bacik 2020-08-06 198 * __btrfs_tree_lock: Lock for write.
061e82bf86d54d Josef Bacik 2020-08-06 199 * @eb - the eb to lock.
061e82bf86d54d Josef Bacik 2020-08-06 200 * @nest - the nesting to use for the lock.
d4e253bbbc2036 David Sterba 2019-10-16 201 *
061e82bf86d54d Josef Bacik 2020-08-06 202 * Returns with the eb->lock write
locked.
b4ce94de9b4d64 Chris Mason 2009-02-04 203 */
b2b79494f64f21 Josef Bacik 2020-08-06 @204 void __btrfs_tree_lock(struct extent_buffer
*eb, enum btrfs_lock_nesting nest)
78d933c79cb649 Jules Irenge 2020-03-31 205 __acquires(&eb->lock)
bd681513fa6f2f Chris Mason 2011-07-16 206 {
34e73cc930a867 Qu Wenruo 2019-04-15 207 u64 start_ns = 0;
34e73cc930a867 Qu Wenruo 2019-04-15 208
34e73cc930a867 Qu Wenruo 2019-04-15 209 if (trace_btrfs_tree_lock_enabled())
34e73cc930a867 Qu Wenruo 2019-04-15 210 start_ns = ktime_get_ns();
34e73cc930a867 Qu Wenruo 2019-04-15 211
061e82bf86d54d Josef Bacik 2020-08-06 212 down_write_nested(&eb->lock, nest);
5b25f70f420076 Arne Jansen 2011-09-13 213 eb->lock_owner = current->pid;
34e73cc930a867 Qu Wenruo 2019-04-15 214 trace_btrfs_tree_lock(eb, start_ns);
925baeddc5b076 Chris Mason 2008-06-25 215 }
925baeddc5b076 Chris Mason 2008-06-25 216
:::::: The code at line 204 was first introduced by commit
:::::: b2b79494f64f21306835ae706656a7b4316a7f4c btrfs: add nesting tags to the locking
helpers
:::::: TO: Josef Bacik <josef(a)toxicpanda.com>
:::::: CC: Josef Bacik <josef(a)toxicpanda.com>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org