From: kernel test robot <lkp@intel.com>
To: Kent Overstreet <kent.overstreet@linux.dev>
Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev,
Kent Overstreet <kent.overstreet@linux.dev>
Subject: [bcachefs:bcachefs-testing 459/1104] fs/bcachefs/alloc/backpointers.c:986:4: error: call to undeclared function '__WARN'; ISO C99 and later do not support implicit function declarations
Date: Mon, 8 Dec 2025 23:39:41 +0800 [thread overview]
Message-ID: <202512082321.2kku0DpK-lkp@intel.com> (raw)
Hi Kent,
First bad commit (maybe != root cause):
tree: https://evilpiepirate.org/git/bcachefs.git bcachefs-testing
head: 2f94f2e080a961cd6401d4bea5c31ff03516d30e
commit: 3fdc7b4035515f784e1d442bcca383f5c0267e53 [459/1104] bcachefs: move alloc files to subdir
config: arm-randconfig-004-20251208 (https://download.01.org/0day-ci/archive/20251208/202512082321.2kku0DpK-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 000e46219ba1ee53fc42d35e00c314c2807e8b14)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251208/202512082321.2kku0DpK-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/202512082321.2kku0DpK-lkp@intel.com/
All errors (new ones prefixed by >>):
>> fs/bcachefs/alloc/backpointers.c:986:4: error: call to undeclared function '__WARN'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
986 | __WARN();
| ^
1 error generated.
vim +/__WARN +986 fs/bcachefs/alloc/backpointers.c
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 883
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 884 static int check_bucket_backpointers_to_extents(struct btree_trans *, struct bch_dev *, struct bpos,
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 885 struct bkey_buf *last_flushed);
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 886
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 887 static int check_bucket_backpointer_mismatch(struct btree_trans *trans, struct bkey_s_c alloc_k,
39cea302f13a0a9 fs/bcachefs/backpointers.c Kent Overstreet 2025-05-09 888 bool *had_mismatch,
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 889 struct bkey_buf *last_flushed,
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 890 struct bpos *last_pos,
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 891 unsigned *nr_iters)
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 892 {
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 893 struct bch_fs *c = trans->c;
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 894 struct bch_alloc_v4 a_convert;
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 895 const struct bch_alloc_v4 *a = bch2_alloc_to_v4(alloc_k, &a_convert);
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 896 bool need_commit = false;
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 897
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 898 if (!bpos_eq(*last_pos, alloc_k.k->p))
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 899 *nr_iters = 0;
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 900
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 901 *last_pos = alloc_k.k->p;
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 902
39cea302f13a0a9 fs/bcachefs/backpointers.c Kent Overstreet 2025-05-09 903 *had_mismatch = false;
39cea302f13a0a9 fs/bcachefs/backpointers.c Kent Overstreet 2025-05-09 904
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 905 if (a->data_type == BCH_DATA_sb ||
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 906 a->data_type == BCH_DATA_journal ||
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 907 a->data_type == BCH_DATA_parity)
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 908 return 0;
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 909
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 910 u32 sectors[ALLOC_SECTORS_NR];
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 911 memset(sectors, 0, sizeof(sectors));
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 912
6bf809fcd4197b5 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-14 913 CLASS(bch2_dev_bucket_tryget_noerror, ca)(trans->c, alloc_k.k->p);
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 914 if (!ca)
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 915 return 0;
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 916
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 917 struct bkey_s_c bp_k;
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 918 int ret = 0;
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 919 for_each_btree_key_max_norestart(trans, iter, BTREE_ID_backpointers,
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 920 bucket_pos_to_bp_start(ca, alloc_k.k->p),
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 921 bucket_pos_to_bp_end(ca, alloc_k.k->p), 0, bp_k, ret) {
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 922 if (bp_k.k->type != KEY_TYPE_backpointer)
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 923 continue;
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 924
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 925 struct bkey_s_c_backpointer bp = bkey_s_c_to_backpointer(bp_k);
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 926
2b67b72da5a0347 fs/bcachefs/backpointers.c Kent Overstreet 2025-08-08 927 if (c->sb.version_upgrade_complete < bcachefs_metadata_version_backpointer_bucket_gen &&
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 928 (bp.v->bucket_gen != a->gen ||
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 929 bp.v->pad)) {
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 930 ret = bch2_backpointer_del(trans, bp_k.k->p);
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 931 if (ret)
f6ecd9850b5e0be fs/bcachefs/backpointers.c Kent Overstreet 2025-07-30 932 return ret;
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 933
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 934 need_commit = true;
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 935 continue;
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 936 }
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 937
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 938 if (bp.v->bucket_gen != a->gen)
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 939 continue;
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 940
962322475bb5ceb fs/bcachefs/backpointers.c Kent Overstreet 2025-03-19 941 int alloc_counter = data_type_to_alloc_counter(bp.v->data_type);
962322475bb5ceb fs/bcachefs/backpointers.c Kent Overstreet 2025-03-19 942 if (alloc_counter < 0)
962322475bb5ceb fs/bcachefs/backpointers.c Kent Overstreet 2025-03-19 943 continue;
962322475bb5ceb fs/bcachefs/backpointers.c Kent Overstreet 2025-03-19 944
962322475bb5ceb fs/bcachefs/backpointers.c Kent Overstreet 2025-03-19 945 sectors[alloc_counter] += bp.v->bucket_len;
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 946 };
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 947 if (ret)
6bf809fcd4197b5 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-14 948 return ret;
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 949
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 950 if (need_commit) {
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 951 ret = bch2_trans_commit(trans, NULL, NULL, BCH_TRANS_COMMIT_no_enospc);
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 952 if (ret)
6bf809fcd4197b5 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-14 953 return ret;
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 954 }
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 955
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 956 if (sectors[ALLOC_dirty] > a->dirty_sectors ||
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 957 sectors[ALLOC_cached] > a->cached_sectors ||
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 958 sectors[ALLOC_stripe] > a->stripe_sectors) {
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 959 if (*nr_iters) {
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 960 CLASS(printbuf, buf)();
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 961 bch2_log_msg_start(c, &buf);
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 962
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 963 prt_printf(&buf, "backpointer sectors > bucket sectors, but found no bad backpointers\n"
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 964 "bucket %llu:%llu data type %s, counters\n",
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 965 alloc_k.k->p.inode,
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 966 alloc_k.k->p.offset,
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 967 __bch2_data_types[a->data_type]);
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 968 if (sectors[ALLOC_dirty] > a->dirty_sectors)
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 969 prt_printf(&buf, "dirty: %u > %u\n",
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 970 sectors[ALLOC_dirty], a->dirty_sectors);
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 971 if (sectors[ALLOC_cached] > a->cached_sectors)
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 972 prt_printf(&buf, "cached: %u > %u\n",
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 973 sectors[ALLOC_cached], a->cached_sectors);
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 974 if (sectors[ALLOC_stripe] > a->stripe_sectors)
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 975 prt_printf(&buf, "stripe: %u > %u\n",
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 976 sectors[ALLOC_stripe], a->stripe_sectors);
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 977
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 978 for_each_btree_key_max_norestart(trans, iter, BTREE_ID_backpointers,
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 979 bucket_pos_to_bp_start(ca, alloc_k.k->p),
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 980 bucket_pos_to_bp_end(ca, alloc_k.k->p), 0, bp_k, ret) {
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 981 bch2_bkey_val_to_text(&buf, c, bp_k);
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 982 prt_newline(&buf);
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 983 }
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 984
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 985 bch2_print_str(c, KERN_ERR, buf.buf);
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 @986 __WARN();
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 987 return ret;
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 988 }
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 989
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 990 *nr_iters += 1;
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 991
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 992 return check_bucket_backpointers_to_extents(trans, ca, alloc_k.k->p, last_flushed) ?:
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 993 bch_err_throw(c, transaction_restart_nested);
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 994 }
8317017fbfa0824 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-04 995
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 996 if (sectors[ALLOC_dirty] != a->dirty_sectors ||
15800f3d4b0134a fs/bcachefs/backpointers.c Kent Overstreet 2025-02-07 997 sectors[ALLOC_cached] != a->cached_sectors ||
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 998 sectors[ALLOC_stripe] != a->stripe_sectors) {
0fb08f59ed996c9 fs/bcachefs/backpointers.c Kent Overstreet 2025-08-08 999 /*
0fb08f59ed996c9 fs/bcachefs/backpointers.c Kent Overstreet 2025-08-08 1000 * Post 1.14 upgrade, we assume that backpointers are mostly
0fb08f59ed996c9 fs/bcachefs/backpointers.c Kent Overstreet 2025-08-08 1001 * correct and a sector count mismatch is probably due to a
0fb08f59ed996c9 fs/bcachefs/backpointers.c Kent Overstreet 2025-08-08 1002 * write buffer race
0fb08f59ed996c9 fs/bcachefs/backpointers.c Kent Overstreet 2025-08-08 1003 *
0fb08f59ed996c9 fs/bcachefs/backpointers.c Kent Overstreet 2025-08-08 1004 * Pre upgrade, we expect all the buckets to be wrong, a write
0fb08f59ed996c9 fs/bcachefs/backpointers.c Kent Overstreet 2025-08-08 1005 * buffer flush is pointless:
0fb08f59ed996c9 fs/bcachefs/backpointers.c Kent Overstreet 2025-08-08 1006 */
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 1007 if (c->sb.version_upgrade_complete >= bcachefs_metadata_version_backpointer_bucket_gen) {
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 1008 ret = bch2_backpointers_maybe_flush(trans, alloc_k, last_flushed);
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 1009 if (ret)
6bf809fcd4197b5 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-14 1010 return ret;
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 1011 }
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 1012
13ffcbae86dadbf fs/bcachefs/backpointers.c Kent Overstreet 2025-05-09 1013 bool empty = (sectors[ALLOC_dirty] +
13ffcbae86dadbf fs/bcachefs/backpointers.c Kent Overstreet 2025-05-09 1014 sectors[ALLOC_stripe] +
13ffcbae86dadbf fs/bcachefs/backpointers.c Kent Overstreet 2025-05-09 1015 sectors[ALLOC_cached]) == 0;
13ffcbae86dadbf fs/bcachefs/backpointers.c Kent Overstreet 2025-05-09 1016
15f969326ee296f fs/bcachefs/backpointers.c Kent Overstreet 2025-05-17 1017 ret = bch2_bucket_bitmap_set(ca, &ca->bucket_backpointer_mismatch,
15f969326ee296f fs/bcachefs/backpointers.c Kent Overstreet 2025-05-17 1018 alloc_k.k->p.offset) ?:
15f969326ee296f fs/bcachefs/backpointers.c Kent Overstreet 2025-05-17 1019 (empty
15f969326ee296f fs/bcachefs/backpointers.c Kent Overstreet 2025-05-17 1020 ? bch2_bucket_bitmap_set(ca, &ca->bucket_backpointer_empty,
15f969326ee296f fs/bcachefs/backpointers.c Kent Overstreet 2025-05-17 1021 alloc_k.k->p.offset)
15f969326ee296f fs/bcachefs/backpointers.c Kent Overstreet 2025-05-17 1022 : 0);
39cea302f13a0a9 fs/bcachefs/backpointers.c Kent Overstreet 2025-05-09 1023
39cea302f13a0a9 fs/bcachefs/backpointers.c Kent Overstreet 2025-05-09 1024 *had_mismatch = true;
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 1025 }
6bf809fcd4197b5 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-14 1026
6bf809fcd4197b5 fs/bcachefs/backpointers.c Kent Overstreet 2025-07-14 1027 return 0;
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 1028 }
c738866e47ef2e4 fs/bcachefs/backpointers.c Kent Overstreet 2024-11-15 1029
:::::: The code at line 986 was first introduced by commit
:::::: 8317017fbfa0824392813fddcf136bc764c16d66 bcachefs: Fix infinite loop in backpointers fsck on upgrade
:::::: 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
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