[viro-vfs:untested.persistency 41/58] arch/s390/hypfs/inode.c:331:3: error: call to undeclared function 'd_mark_discardable'; ISO C99 and later do not support implicit function declarations

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

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git untested.persistency
head:   2860da18a75c4e0e4d477417ac9ae9f1d37c676c
commit: 2ecf285ca491683e16fc72b963cdbb23dc2b4c7a [41/58] convert hypfs
config: s390-defconfig (https://download.01.org/0day-ci/archive/20240515/202405150917.hqI6d508-lkp@intel.com/config)
compiler: clang version 19.0.0git (https://github.com/llvm/llvm-project b910bebc300dafb30569cecc3017b446ea8eafa0)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240515/202405150917.hqI6d508-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/202405150917.hqI6d508-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from arch/s390/hypfs/inode.c:15:
   In file included from include/linux/fs_context.h:14:
   In file included from include/linux/security.h:33:
   In file included from include/linux/mm.h:2210:
   include/linux/vmstat.h:508:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     508 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     509 |                            item];
         |                            ~~~~
   include/linux/vmstat.h:515:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     515 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     516 |                            NR_VM_NUMA_EVENT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~~
   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_"
         |                               ~~~~~~~~~~~ ^ ~~~
   include/linux/vmstat.h:527:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     527 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     528 |                            NR_VM_NUMA_EVENT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~~
   include/linux/vmstat.h:536:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     536 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     537 |                            NR_VM_NUMA_EVENT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~~
>> arch/s390/hypfs/inode.c:331:3: error: call to undeclared function 'd_mark_discardable'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     331 |                 d_mark_discardable(dentry);
         |                 ^
   arch/s390/hypfs/inode.c:331:3: note: did you mean 'd_make_discardable'?
   include/linux/dcache.h:617:13: note: 'd_make_discardable' declared here
     617 | extern void d_make_discardable(struct dentry *dentry);
         |             ^
   5 warnings and 1 error generated.


vim +/d_mark_discardable +331 arch/s390/hypfs/inode.c

   316	
   317	static struct dentry *hypfs_create_file(struct dentry *parent, const char *name,
   318						char *data, umode_t mode)
   319	{
   320		struct dentry *dentry;
   321		struct inode *inode;
   322	
   323		inode_lock(d_inode(parent));
   324		dentry = start_creating_persistent(parent, name);
   325		if (IS_ERR(dentry)) {
   326			dentry = ERR_PTR(-ENOMEM);
   327			goto fail;
   328		}
   329		inode = hypfs_make_inode(parent->d_sb, mode);
   330		if (!inode) {
 > 331			d_mark_discardable(dentry);
   332			dentry = ERR_PTR(-ENOMEM);
   333			goto fail;
   334		}
   335		if (S_ISREG(mode)) {
   336			inode->i_fop = &hypfs_file_ops;
   337			if (data)
   338				inode->i_size = strlen(data);
   339			else
   340				inode->i_size = 0;
   341		} else if (S_ISDIR(mode)) {
   342			inode->i_op = &simple_dir_inode_operations;
   343			inode->i_fop = &simple_dir_operations;
   344			inc_nlink(d_inode(parent));
   345		} else
   346			BUG();
   347		inode->i_private = data;
   348		d_instantiate(dentry, inode);
   349	fail:
   350		inode_unlock(d_inode(parent));
   351		return dentry;
   352	}
   353	

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