[kbuild-all] [hch-misc:dma-header-cleanups 29/31] kernel/dma/debug.c:403:6: warning: no previous prototype for 'debug_dma_dump_mappings'

tree: git://git.infradead.org/users/hch/misc.git dma-header-cleanups head: 5093be553444b2cc6c459d6e9f5a4692ac0b4125 commit: 6f0e3350579b304d60868c94322cfb8c9e9bc54c [29/31] dma-mapping: move dma-debug.h to kernel/dma/ config: xtensa-allyesconfig (attached as .config) compiler: xtensa-linux-gcc (GCC) 9.3.0 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 git checkout 6f0e3350579b304d60868c94322cfb8c9e9bc54c # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=xtensa If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): 403 | void debug_dma_dump_mappings(struct device *dev) | ^~~~~~~~~~~~~~~~~~~~~~~ 862 | void dma_debug_add_bus(struct bus_type *bus) | ^~~~~~~~~~~~~~~~~ git remote add hch-misc git://git.infradead.org/users/hch/misc.git git fetch --no-tags hch-misc dma-header-cleanups git checkout 6f0e3350579b304d60868c94322cfb8c9e9bc54c vim +/debug_dma_dump_mappings +403 kernel/dma/debug.c 0abdd7a81b7e3f lib/dma-debug.c Dan Williams 2014-01-21 399 ac26c18bd35d98 lib/dma-debug.c David Woodhouse 2009-02-12 400 /* ac26c18bd35d98 lib/dma-debug.c David Woodhouse 2009-02-12 401 * Dump mapping entries for debugging purposes ac26c18bd35d98 lib/dma-debug.c David Woodhouse 2009-02-12 402 */ ac26c18bd35d98 lib/dma-debug.c David Woodhouse 2009-02-12 @403 void debug_dma_dump_mappings(struct device *dev) ac26c18bd35d98 lib/dma-debug.c David Woodhouse 2009-02-12 404 { ac26c18bd35d98 lib/dma-debug.c David Woodhouse 2009-02-12 405 int idx; ac26c18bd35d98 lib/dma-debug.c David Woodhouse 2009-02-12 406 ac26c18bd35d98 lib/dma-debug.c David Woodhouse 2009-02-12 407 for (idx = 0; idx < HASH_SIZE; idx++) { ac26c18bd35d98 lib/dma-debug.c David Woodhouse 2009-02-12 408 struct hash_bucket *bucket = &dma_entry_hash[idx]; ac26c18bd35d98 lib/dma-debug.c David Woodhouse 2009-02-12 409 struct dma_debug_entry *entry; ac26c18bd35d98 lib/dma-debug.c David Woodhouse 2009-02-12 410 unsigned long flags; ac26c18bd35d98 lib/dma-debug.c David Woodhouse 2009-02-12 411 ac26c18bd35d98 lib/dma-debug.c David Woodhouse 2009-02-12 412 spin_lock_irqsave(&bucket->lock, flags); ac26c18bd35d98 lib/dma-debug.c David Woodhouse 2009-02-12 413 ac26c18bd35d98 lib/dma-debug.c David Woodhouse 2009-02-12 414 list_for_each_entry(entry, &bucket->list, list) { ac26c18bd35d98 lib/dma-debug.c David Woodhouse 2009-02-12 415 if (!dev || dev == entry->dev) { ac26c18bd35d98 lib/dma-debug.c David Woodhouse 2009-02-12 416 dev_info(entry->dev, 0abdd7a81b7e3f lib/dma-debug.c Dan Williams 2014-01-21 417 "%s idx %d P=%Lx N=%lx D=%Lx L=%Lx %s %s\n", ac26c18bd35d98 lib/dma-debug.c David Woodhouse 2009-02-12 418 type2name[entry->type], idx, 0abdd7a81b7e3f lib/dma-debug.c Dan Williams 2014-01-21 419 phys_addr(entry), entry->pfn, ac26c18bd35d98 lib/dma-debug.c David Woodhouse 2009-02-12 420 entry->dev_addr, entry->size, 6c9c6d6301287e lib/dma-debug.c Shuah Khan 2012-10-08 421 dir2name[entry->direction], 6c9c6d6301287e lib/dma-debug.c Shuah Khan 2012-10-08 422 maperr2str[entry->map_err_type]); ac26c18bd35d98 lib/dma-debug.c David Woodhouse 2009-02-12 423 } ac26c18bd35d98 lib/dma-debug.c David Woodhouse 2009-02-12 424 } ac26c18bd35d98 lib/dma-debug.c David Woodhouse 2009-02-12 425 ac26c18bd35d98 lib/dma-debug.c David Woodhouse 2009-02-12 426 spin_unlock_irqrestore(&bucket->lock, flags); 9ff6aa027dbb98 kernel/dma/debug.c Eric Dumazet 2019-10-28 427 cond_resched(); ac26c18bd35d98 lib/dma-debug.c David Woodhouse 2009-02-12 428 } ac26c18bd35d98 lib/dma-debug.c David Woodhouse 2009-02-12 429 } ac26c18bd35d98 lib/dma-debug.c David Woodhouse 2009-02-12 430 :::::: The code at line 403 was first introduced by commit :::::: ac26c18bd35d982d1ba06020a992b1085fefc3e2 dma-debug: add function to dump dma mappings :::::: TO: David Woodhouse <dwmw2(a)infradead.org&gt; :::::: CC: Joerg Roedel <joerg.roedel(a)amd.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org