Messages in this thread | | | Date | Fri, 29 Oct 2021 17:55:20 +0800 | From | kernel test robot <> | Subject | [colyli-bcache:nvdimm-meta 23/23] drivers/md/bcache/btree.c:287:9: warning: argument 2 null where non-null expected |
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/colyli/linux-bcache.git nvdimm-meta head: 544e57301b9adc7628556f4b709f65c35142df47 commit: 544e57301b9adc7628556f4b709f65c35142df47 [23/23] bcache: store btree nodes on nvdimm config: ia64-randconfig-r002-20211028 (attached as .config) compiler: ia64-linux-gcc (GCC) 11.2.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://git.kernel.org/pub/scm/linux/kernel/git/colyli/linux-bcache.git/commit/?id=544e57301b9adc7628556f4b709f65c35142df47 git remote add colyli-bcache https://git.kernel.org/pub/scm/linux/kernel/git/colyli/linux-bcache.git git fetch --no-tags colyli-bcache nvdimm-meta git checkout 544e57301b9adc7628556f4b709f65c35142df47 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=ia64
If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
In file included from drivers/md/bcache/nvmpg.h:8, from drivers/md/bcache/btree.c:29: drivers/md/bcache/nvmpg_format.h:132:19: warning: 'bch_nvmpg_recs_magic' defined but not used [-Wunused-const-variable=] 132 | static const __u8 bch_nvmpg_recs_magic[] = { | ^~~~~~~~~~~~~~~~~~~~ drivers/md/bcache/nvmpg_format.h:129:19: warning: 'bch_nvmpg_magic' defined but not used [-Wunused-const-variable=] 129 | static const __u8 bch_nvmpg_magic[] = { | ^~~~~~~~~~~~~~~ In function '__bch_nvmpg_btree_node_read', inlined from 'bch_btree_node_read' at drivers/md/bcache/btree.c:307:3: >> drivers/md/bcache/btree.c:287:9: warning: argument 2 null where non-null expected [-Wnonnull] 287 | memcpy(b->keys.set[0].data, ptr, KEY_SIZE(&b->key) << 9); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from include/linux/string.h:20, from include/linux/bitmap.h:10, from include/linux/cpumask.h:12, from include/linux/smp.h:13, from include/linux/lockdep.h:14, from include/linux/spinlock.h:63, from include/linux/wait.h:9, from include/linux/mempool.h:8, from include/linux/bio.h:8, from drivers/md/bcache/bcache.h:181, from drivers/md/bcache/btree.c:24: drivers/md/bcache/btree.c: In function 'bch_btree_node_read': arch/ia64/include/asm/string.h:19:14: note: in a call to function 'memcpy' declared 'nonnull' 19 | extern void *memcpy (void *, const void *, __kernel_size_t); | ^~~~~~ In file included from include/linux/bitmap.h:10, from include/linux/cpumask.h:12, from include/linux/smp.h:13, from include/linux/lockdep.h:14, from include/linux/spinlock.h:63, from include/linux/wait.h:9, from include/linux/mempool.h:8, from include/linux/bio.h:8, from drivers/md/bcache/bcache.h:181, from drivers/md/bcache/btree.c:24: In function 'memcpy_flushcache', inlined from '__do_nvmpg_btree_node_write' at drivers/md/bcache/btree.c:475:2, inlined from 'do_btree_node_write' at drivers/md/bcache/btree.c:491:3, inlined from '__bch_btree_node_write' at drivers/md/bcache/btree.c:517:2: >> include/linux/string.h:167:9: warning: argument 1 null where non-null expected [-Wnonnull] 167 | memcpy(dst, src, cnt); | ^~~~~~~~~~~~~~~~~~~~~ In file included from include/linux/string.h:20, from include/linux/bitmap.h:10, from include/linux/cpumask.h:12, from include/linux/smp.h:13, from include/linux/lockdep.h:14, from include/linux/spinlock.h:63, from include/linux/wait.h:9, from include/linux/mempool.h:8, from include/linux/bio.h:8, from drivers/md/bcache/bcache.h:181, from drivers/md/bcache/btree.c:24: drivers/md/bcache/btree.c: In function '__bch_btree_node_write': arch/ia64/include/asm/string.h:19:14: note: in a call to function 'memcpy' declared 'nonnull' 19 | extern void *memcpy (void *, const void *, __kernel_size_t); | ^~~~~~
vim +287 drivers/md/bcache/btree.c
280 281 static void __bch_nvmpg_btree_node_read(struct btree *b) 282 { 283 uint64_t start_time = local_clock(); 284 void *ptr; 285 286 ptr = bkey_offset_to_nvmpg_ptr(PTR_OFFSET(&b->key, 0)); > 287 memcpy(b->keys.set[0].data, ptr, KEY_SIZE(&b->key) << 9); 288 289 if (btree_node_io_error(b)) 290 goto err; 291 292 bch_btree_node_read_done(b); 293 bch_time_stats_update(&b->c->btree_read_time, start_time); 294 295 err: 296 bch_cache_set_error(b->c, 297 "io error reading NVDIMM pages at 0x%p\n", ptr); 298 } 299
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