* [bcachefs:bcachefs-testing 166/167] fs/bcachefs/bset.c:219:7: warning: explicitly assigning value of variable of type 'struct btree_node_iter_set *' to itself
@ 2024-05-08 13:42 kernel test robot
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From: kernel test robot @ 2024-05-08 13:42 UTC (permalink / raw)
To: Kent Overstreet; +Cc: llvm, oe-kbuild-all, Kent Overstreet
tree: https://evilpiepirate.org/git/bcachefs.git bcachefs-testing
head: 820055ea04424d9c5d0d58322888ee46fefb55bc
commit: 50c70bbc00a9a420984148aefde1b593d3679848 [166/167] bcachefs: for_each_bset() declares loop iter
config: hexagon-allyesconfig (https://download.01.org/0day-ci/archive/20240508/202405082117.aZrGX86B-lkp@intel.com/config)
compiler: clang version 19.0.0git (https://github.com/llvm/llvm-project 0ab4458df0688955620b72cc2c72a32dffad3615)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240508/202405082117.aZrGX86B-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/202405082117.aZrGX86B-lkp@intel.com/
All warnings (new ones prefixed by >>):
In file included from fs/bcachefs/bset.c:9:
In file included from fs/bcachefs/bcachefs.h:188:
In file included from include/linux/bio.h:10:
In file included from include/linux/blk_types.h:10:
In file included from include/linux/bvec.h:10:
In file included from include/linux/highmem.h:10:
In file included from include/linux/mm.h:2210:
include/linux/vmstat.h:522:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
522 | return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
| ~~~~~~~~~~~ ^ ~~~
In file included from fs/bcachefs/bset.c:9:
In file included from fs/bcachefs/bcachefs.h:188:
In file included from include/linux/bio.h:10:
In file included from include/linux/blk_types.h:10:
In file included from include/linux/bvec.h:10:
In file included from include/linux/highmem.h:12:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/hexagon/include/asm/io.h:328:
include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
547 | val = __raw_readb(PCI_IOBASE + addr);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:560:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
560 | val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
| ~~~~~~~~~~ ^
include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
37 | #define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
| ^
In file included from fs/bcachefs/bset.c:9:
In file included from fs/bcachefs/bcachefs.h:188:
In file included from include/linux/bio.h:10:
In file included from include/linux/blk_types.h:10:
In file included from include/linux/bvec.h:10:
In file included from include/linux/highmem.h:12:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/hexagon/include/asm/io.h:328:
include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
573 | val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
| ~~~~~~~~~~ ^
include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
35 | #define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
| ^
In file included from fs/bcachefs/bset.c:9:
In file included from fs/bcachefs/bcachefs.h:188:
In file included from include/linux/bio.h:10:
In file included from include/linux/blk_types.h:10:
In file included from include/linux/bvec.h:10:
In file included from include/linux/highmem.h:12:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/hexagon/include/asm/io.h:328:
include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
584 | __raw_writeb(value, PCI_IOBASE + addr);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:594:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
594 | __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:604:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
604 | __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
| ~~~~~~~~~~ ^
>> fs/bcachefs/bset.c:219:7: warning: explicitly assigning value of variable of type 'struct btree_node_iter_set *' to itself [-Wself-assign]
219 | set = set;
| ~~~ ^ ~~~
8 warnings generated.
vim +219 fs/bcachefs/bset.c
192
193 void bch2_btree_node_iter_verify(struct btree_node_iter *iter,
194 struct btree *b)
195 {
196 struct btree_node_iter_set *set, *s2;
197 struct bkey_packed *k, *p;
198
199 if (bch2_btree_node_iter_end(iter))
200 return;
201
202 /* Verify no duplicates: */
203 btree_node_iter_for_each(iter, set) {
204 BUG_ON(set->k > set->end);
205 btree_node_iter_for_each(iter, s2)
206 BUG_ON(set != s2 && set->end == s2->end);
207 }
208
209 /* Verify that set->end is correct: */
210 btree_node_iter_for_each(iter, set) {
211 for_each_bset(b, t)
212 if (set->end == t->end_offset) {
213 BUG_ON(set->k < btree_bkey_first_offset(t) ||
214 set->k >= t->end_offset);
215 goto found;
216 }
217 BUG();
218 found:
> 219 set = set;
220 }
221
222 /* Verify iterator is sorted: */
223 btree_node_iter_for_each(iter, set)
224 BUG_ON(set != iter->data &&
225 btree_node_iter_cmp(b, set[-1], set[0]) > 0);
226
227 k = bch2_btree_node_iter_peek_all(iter, b);
228
229 for_each_bset(b, t) {
230 if (iter->data[0].end == t->end_offset)
231 continue;
232
233 p = bch2_bkey_prev_all(b, t,
234 bch2_btree_node_iter_bset_pos(iter, b, t));
235
236 BUG_ON(p && bkey_iter_cmp(b, k, p) < 0);
237 }
238 }
239
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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