[bcache:nvdimm-meta 4/8] drivers/md/bcache/nvm-pages.c:185:7: error: redefinition of 'bch_nvm_alloc_pages'

[kernel test robot <lkp@intel.com>]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/colyli/linux-bcache.git nvdimm-meta
head:   cafe7a7d88c5585454eb1285218db1e60a174797
commit: 47a0cdd59b4c55f2c9379c2d5ae03aeb97c587b7 [4/8] bcache: bch_nvm_alloc_pages() of the buddy
config: arc-randconfig-s031-20210108 (attached as .config)
compiler: arc-elf-gcc (GCC) 9.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.3-208-g46a52ca4-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/colyli/linux-bcache.git/commit/?id=47a0cdd59b4c55f2c9379c2d5ae03aeb97c587b7
        git remote add bcache https://git.kernel.org/pub/scm/linux/kernel/git/colyli/linux-bcache.git
        git fetch --no-tags bcache nvdimm-meta
        git checkout 47a0cdd59b4c55f2c9379c2d5ae03aeb97c587b7
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=arc 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

>> drivers/md/bcache/nvm-pages.c:185:7: error: redefinition of 'bch_nvm_alloc_pages'
     185 | void *bch_nvm_alloc_pages(int order, const char *owner_uuid)
         |       ^~~~~~~~~~~~~~~~~~~
   In file included from drivers/md/bcache/nvm-pages.c:14:
   drivers/md/bcache/nvm-pages.h:93:21: note: previous definition of 'bch_nvm_alloc_pages' was here
      93 | static inline void *bch_nvm_alloc_pages(int order, const char *owner_uuid)
         |                     ^~~~~~~~~~~~~~~~~~~
   drivers/md/bcache/nvm-pages.c:432:27: error: redefinition of 'bch_register_namespace'
     432 | struct bch_nvm_namespace *bch_register_namespace(const char *dev_path)
         |                           ^~~~~~~~~~~~~~~~~~~~~~
   In file included from drivers/md/bcache/nvm-pages.c:14:
   drivers/md/bcache/nvm-pages.h:83:41: note: previous definition of 'bch_register_namespace' was here
      83 | static inline struct bch_nvm_namespace *bch_register_namespace(const char *dev_path)
         |                                         ^~~~~~~~~~~~~~~~~~~~~~
   drivers/md/bcache/nvm-pages.c:528:12: error: redefinition of 'bch_nvm_init'
     528 | int __init bch_nvm_init(void)
         |            ^~~~~~~~~~~~
   In file included from drivers/md/bcache/nvm-pages.c:14:
   drivers/md/bcache/nvm-pages.h:87:19: note: previous definition of 'bch_nvm_init' was here
      87 | static inline int bch_nvm_init(void)
         |                   ^~~~~~~~~~~~
   drivers/md/bcache/nvm-pages.c:544:6: error: redefinition of 'bch_nvm_exit'
     544 | void bch_nvm_exit(void)
         |      ^~~~~~~~~~~~
   In file included from drivers/md/bcache/nvm-pages.c:14:
   drivers/md/bcache/nvm-pages.h:91:20: note: previous definition of 'bch_nvm_exit' was here
      91 | static inline void bch_nvm_exit(void) { }
         |                    ^~~~~~~~~~~~
   In file included from drivers/md/bcache/nvm-pages.h:6,
                    from drivers/md/bcache/nvm-pages.c:14:
   include/uapi/linux/bcache-nvm.h:105:19: warning: 'nvm_pages_pgalloc_magic' defined but not used [-Wunused-const-variable=]
     105 | static const char nvm_pages_pgalloc_magic[] = {
         |                   ^~~~~~~~~~~~~~~~~~~~~~~
   include/uapi/linux/bcache-nvm.h:102:19: warning: 'nvm_pages_magic' defined but not used [-Wunused-const-variable=]
     102 | static const char nvm_pages_magic[] = {
         |                   ^~~~~~~~~~~~~~~


vim +/bch_nvm_alloc_pages +185 drivers/md/bcache/nvm-pages.c

   184	
 > 185	void *bch_nvm_alloc_pages(int order, const char *owner_uuid)
   186	{
   187		void *kaddr = NULL;
   188		struct bch_owner_list *owner_list;
   189		struct bch_nvm_alloced_recs *alloced_recs;
   190		int i, j;
   191	
   192		mutex_lock(&only_set->lock);
   193		owner_list = find_owner_list(owner_uuid, true);
   194	
   195		for (j = 0; j < only_set->total_namespaces_nr; j++) {
   196			struct bch_nvm_namespace *ns = only_set->nss[j];
   197	
   198			if (!ns || (ns->free < (1 << order)))
   199				continue;
   200	
   201			for (i = order; i < MAX_ORDER; i++) {
   202				struct list_head *list;
   203				struct page *page, *buddy_page;
   204	
   205				if (list_empty(&ns->free_area[i]))
   206					continue;
   207	
   208				list = ns->free_area[i].next;
   209				page = container_of((void *)list, struct page, zone_device_data);
   210	
   211				list_del(list);
   212	
   213				while (i != order) {
   214					buddy_page = nvm_vaddr_to_page(ns,
   215						nvm_pgoff_to_vaddr(ns, page->index + (1 << (i - 1))));
   216					buddy_page->private = i - 1;
   217					buddy_page->index = page->index + (1 << (i - 1));
   218					__SetPageBuddy(buddy_page);
   219					list_add((struct list_head *)&buddy_page->zone_device_data,
   220						&ns->free_area[i - 1]);
   221					i--;
   222				}
   223	
   224				page->private = order;
   225				__ClearPageBuddy(page);
   226				ns->free -= 1 << order;
   227				kaddr = nvm_pgoff_to_vaddr(ns, page->index);
   228				break;
   229			}
   230	
   231			if (i != MAX_ORDER) {
   232				alloced_recs = find_nvm_alloced_recs(owner_list, ns, true);
   233				add_extent(alloced_recs, kaddr, order);
   234				break;
   235			}
   236		}
   237	
   238		mutex_unlock(&only_set->lock);
   239		return kaddr;
   240	}
   241	EXPORT_SYMBOL_GPL(bch_nvm_alloc_pages);
   242	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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