[dhowells-fs:fscache-cache-2 83/84] fs/fscache/cache.c:252:13: sparse: sparse: context imbalance in 'fscache_caches_seq_start' - wrong count at exit

[dhowells-fs:fscache-cache-2 83/84] fs/fscache/cache.c:252:13: sparse: sparse: context imbalance in 'fscache_caches_seq_start' - wrong count at exit

[kernel test robot]

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CC: kbuild-all(a)lists.01.org
TO: David Howells <dhowells@redhat.com>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git fscache-cache-2
head:   8c0dade745a9bacc037c10f7fb0f1900738ebd47
commit: 62b8b745edb02283b51525fd6a7a1a74f5144ea6 [83/84] fscache: Overhaul the index
:::::: branch date: 4 hours ago
:::::: commit date: 4 hours ago
config: x86_64-randconfig-s021-20210401 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.3-279-g6d5d9b42-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git/commit/?id=62b8b745edb02283b51525fd6a7a1a74f5144ea6
        git remote add dhowells-fs https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git
        git fetch --no-tags dhowells-fs fscache-cache-2
        git checkout 62b8b745edb02283b51525fd6a7a1a74f5144ea6
        # save the attached .config to linux build tree
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>


sparse warnings: (new ones prefixed by >>)
   fs/fscache/cache.c:87:6: sparse: sparse: symbol 'fscache_get_cache' was not declared. Should it be static?
>> fs/fscache/cache.c:252:13: sparse: sparse: context imbalance in 'fscache_caches_seq_start' - wrong count at exit
>> fs/fscache/cache.c:264:13: sparse: sparse: context imbalance in 'fscache_caches_seq_stop' - wrong count at exit
--
>> fs/fscache/volume.c:373:13: sparse: sparse: context imbalance in 'fscache_volumes_seq_start' - wrong count at exit
>> fs/fscache/volume.c:385:13: sparse: sparse: context imbalance in 'fscache_volumes_seq_stop' - wrong count at exit

vim +/fscache_caches_seq_start +252 fs/fscache/cache.c

4c515dd47ab41b David Howells 2009-04-03  251  
62b8b745edb022 David Howells 2021-03-18 @252  static void *fscache_caches_seq_start(struct seq_file *m, loff_t *_pos)
62b8b745edb022 David Howells 2021-03-18  253  	__acquires(fscache_caches_lock)
4c515dd47ab41b David Howells 2009-04-03  254  {
62b8b745edb022 David Howells 2021-03-18  255  	down_read(&fscache_addremove_sem);
62b8b745edb022 David Howells 2021-03-18  256  	return seq_list_start_head(&fscache_caches, *_pos);
62b8b745edb022 David Howells 2021-03-18  257  }
4c515dd47ab41b David Howells 2009-04-03  258  
62b8b745edb022 David Howells 2021-03-18  259  static void *fscache_caches_seq_next(struct seq_file *m, void *v, loff_t *_pos)
62b8b745edb022 David Howells 2021-03-18  260  {
62b8b745edb022 David Howells 2021-03-18  261  	return seq_list_next(v, &fscache_caches, _pos);
62b8b745edb022 David Howells 2021-03-18  262  }
4c515dd47ab41b David Howells 2009-04-03  263  
62b8b745edb022 David Howells 2021-03-18 @264  static void fscache_caches_seq_stop(struct seq_file *m, void *v)
62b8b745edb022 David Howells 2021-03-18  265  	__releases(rcu)
62b8b745edb022 David Howells 2021-03-18  266  {
62b8b745edb022 David Howells 2021-03-18  267  	up_read(&fscache_addremove_sem);
4c515dd47ab41b David Howells 2009-04-03  268  }
62b8b745edb022 David Howells 2021-03-18  269  

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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