[koverstreet-bcachefs:bcachefs-rebalance_v2 458/799] fs/bcachefs/btree/key_cache.c:849:9: sparse: sparse: dereference of noderef expression

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From: kernel test robot <lkp@intel.com>
To: Kent Overstreet <kent.overstreet@linux.dev>
Cc: oe-kbuild-all@lists.linux.dev
Subject: [koverstreet-bcachefs:bcachefs-rebalance_v2 458/799] fs/bcachefs/btree/key_cache.c:849:9: sparse: sparse: dereference of noderef expression
Date: Tue, 15 Sep 2026 19:27:41 +0800	[thread overview]
Message-ID: <202609151944.XkdSMhhx-lkp@intel.com> (raw)

Hi Kent,

First bad commit (maybe != root cause):

tree:   https://github.com/koverstreet/bcachefs bcachefs-rebalance_v2
head:   d4b3d00447faf8d4d95db47e3902e4ca4db8fbdc
commit: caf90d22262c52f7c29c4b08bd50f2a27d3dbe25 [458/799] bcachefs: move btree files to subdir
config: openrisc-randconfig-r112-20260915 (https://download.01.org/0day-ci/archive/20260915/202609151944.XkdSMhhx-lkp@intel.com/config)
compiler: or1k-linux-gcc (GCC) 15.2.0
sparse: v0.6.5-rc1
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260915/202609151944.XkdSMhhx-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202609151944.XkdSMhhx-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> fs/bcachefs/btree/key_cache.c:849:9: sparse: sparse: dereference of noderef expression
--
>> fs/bcachefs/btree/locking.c:328:36: sparse: sparse: incompatible types in comparison expression (different address spaces):
   fs/bcachefs/btree/locking.c:328:36: sparse:    struct btree_path [noderef] __rcu *
   fs/bcachefs/btree/locking.c:328:36: sparse:    struct btree_path *
--
>> fs/bcachefs/btree/interior.c:1191:18: sparse: sparse: mixing different enum types:
   fs/bcachefs/btree/interior.c:1191:18: sparse:    unsigned int enum bch_trans_commit_flags
   fs/bcachefs/btree/interior.c:1191:18: sparse:    unsigned int enum bch_watermark
--
>> fs/bcachefs/btree/iter.c:1713:9: sparse: sparse: incompatible types in comparison expression (different address spaces):
   fs/bcachefs/btree/iter.c:1713:9: sparse:    unsigned long [noderef] __rcu *
   fs/bcachefs/btree/iter.c:1713:9: sparse:    unsigned long *
   fs/bcachefs/btree/iter.c:1714:9: sparse: sparse: incompatible types in comparison expression (different address spaces):
   fs/bcachefs/btree/iter.c:1714:9: sparse:    struct btree_path [noderef] __rcu *
   fs/bcachefs/btree/iter.c:1714:9: sparse:    struct btree_path *
   fs/bcachefs/btree/iter.c:1715:9: sparse: sparse: incompatible types in comparison expression (different address spaces):
   fs/bcachefs/btree/iter.c:1715:9: sparse:    unsigned short [noderef] __rcu *
   fs/bcachefs/btree/iter.c:1715:9: sparse:    unsigned short [usertype] *
   fs/bcachefs/btree/iter.c:1716:9: sparse: sparse: incompatible types in comparison expression (different address spaces):
   fs/bcachefs/btree/iter.c:1716:9: sparse:    struct btree_insert_entry [noderef] __rcu *
   fs/bcachefs/btree/iter.c:1716:9: sparse:    struct btree_insert_entry *
   fs/bcachefs/btree/iter.c:3735:36: sparse: sparse: incompatible types in comparison expression (different address spaces):
   fs/bcachefs/btree/iter.c:3735:36: sparse:    struct btree_path [noderef] __rcu *
   fs/bcachefs/btree/iter.c:3735:36: sparse:    struct btree_path *
   fs/bcachefs/btree/iter.c:3331:9: sparse: sparse: context imbalance in 'bch2_trans_srcu_unlock' - unexpected unlock
   fs/bcachefs/btree/iter.c:3355:9: sparse: sparse: context imbalance in 'bch2_trans_srcu_lock' - different lock contexts for basic block
   fs/bcachefs/btree/iter.c:3633:9: sparse: sparse: context imbalance in 'bch2_trans_put' - different lock contexts for basic block

vim +849 fs/bcachefs/btree/key_cache.c

d211b408abbcec fs/bcachefs/btree_key_cache.c Kent Overstreet   2020-06-15  841  
5147b9ae768758 fs/bcachefs/btree_key_cache.c Kent Overstreet   2024-04-20  842  void bch2_btree_key_cache_to_text(struct printbuf *out, struct btree_key_cache *bc)
d211b408abbcec fs/bcachefs/btree_key_cache.c Kent Overstreet   2020-06-15  843  {
5147b9ae768758 fs/bcachefs/btree_key_cache.c Kent Overstreet   2024-04-20  844  	printbuf_tabstop_push(out, 24);
5147b9ae768758 fs/bcachefs/btree_key_cache.c Kent Overstreet   2024-04-20  845  	printbuf_tabstop_push(out, 12);
5147b9ae768758 fs/bcachefs/btree_key_cache.c Kent Overstreet   2024-04-20  846  
5147b9ae768758 fs/bcachefs/btree_key_cache.c Kent Overstreet   2024-04-20  847  	prt_printf(out, "keys:\t%lu\r\n",		atomic_long_read(&bc->nr_keys));
5147b9ae768758 fs/bcachefs/btree_key_cache.c Kent Overstreet   2024-04-20  848  	prt_printf(out, "dirty:\t%lu\r\n",		atomic_long_read(&bc->nr_dirty));
f2bfe7e83765f3 fs/bcachefs/btree_key_cache.c Kent Overstreet   2024-06-08 @849  	prt_printf(out, "table size:\t%u\r\n",		bc->table.tbl->size);
5f1929f1f077d3 fs/bcachefs/btree_key_cache.c Kent Overstreet   2024-06-13  850  	prt_newline(out);
5f1929f1f077d3 fs/bcachefs/btree_key_cache.c Kent Overstreet   2024-06-13  851  	prt_printf(out, "shrinker:\n");
5147b9ae768758 fs/bcachefs/btree_key_cache.c Kent Overstreet   2024-04-20  852  	prt_printf(out, "requested_to_free:\t%lu\r\n",	bc->requested_to_free);
5147b9ae768758 fs/bcachefs/btree_key_cache.c Kent Overstreet   2024-04-20  853  	prt_printf(out, "freed:\t%lu\r\n",		bc->freed);
5147b9ae768758 fs/bcachefs/btree_key_cache.c Kent Overstreet   2024-04-20  854  	prt_printf(out, "skipped_dirty:\t%lu\r\n",	bc->skipped_dirty);
5147b9ae768758 fs/bcachefs/btree_key_cache.c Kent Overstreet   2024-04-20  855  	prt_printf(out, "skipped_accessed:\t%lu\r\n",	bc->skipped_accessed);
5147b9ae768758 fs/bcachefs/btree_key_cache.c Kent Overstreet   2024-04-20  856  	prt_printf(out, "skipped_lock_fail:\t%lu\r\n",	bc->skipped_lock_fail);
5f1929f1f077d3 fs/bcachefs/btree_key_cache.c Kent Overstreet   2024-06-13  857  	prt_newline(out);
5396e5af3c1032 fs/bcachefs/btree_key_cache.c Nathan Chancellor 2024-08-21  858  	prt_printf(out, "pending:\t%zu\r\n",		per_cpu_sum(bc->nr_pending));
d211b408abbcec fs/bcachefs/btree_key_cache.c Kent Overstreet   2020-06-15  859  }
14ba3706b3a8b5 fs/bcachefs/btree_key_cache.c Kent Overstreet   2020-11-18  860  

:::::: The code at line 849 was first introduced by commit
:::::: f2bfe7e83765f3bd84382cc75d8ac3ca619de39a bcachefs: Rip out freelists from btree key cache

:::::: TO: Kent Overstreet <kent.overstreet@linux.dev>
:::::: CC: Kent Overstreet <kent.overstreet@linux.dev>

--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

                 reply	other threads:[~2026-09-15 11:28 UTC|newest]

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