[mszeredi-fuse:extent-map-v3 28/29] fs/fuse/ext_map.c:150:23: warning: unused variable 'pfn'

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

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse.git extent-map-v3
head:   abdbd9557c238384900ebd545f426a609e0162ae
commit: 91fc78ad913efd321396e414a561474c9072d334 [28/29] fuse: add extent map I/O support
config: nios2-randconfig-r2106-20261006 (https://download.01.org/0day-ci/archive/20261006/202610062207.LQIBA0hv-lkp@intel.com/config)
compiler: nios2-linux-gcc (GCC) 11.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261006/202610062207.LQIBA0hv-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/202610062207.LQIBA0hv-lkp@intel.com/

All warnings (new ones prefixed by >>):

   fs/fuse/ext_map.c: In function 'fuse_ext_map_huge_fault':
>> fs/fuse/ext_map.c:150:23: warning: unused variable 'pfn' [-Wunused-variable]
     150 |         unsigned long pfn;
         |                       ^~~
   At top level:
>> fs/fuse/ext_map.c:141:31: warning: 'fuse_ext_map_iomap_ops' defined but not used [-Wunused-const-variable=]
     141 | static const struct iomap_ops fuse_ext_map_iomap_ops = {
         |                               ^~~~~~~~~~~~~~~~~~~~~~


vim +/pfn +150 fs/fuse/ext_map.c

   140	
 > 141	static const struct iomap_ops fuse_ext_map_iomap_ops = {
   142		.iomap_begin		= fuse_ext_map_iomap_begin,
   143	};
   144	
   145	static vm_fault_t fuse_ext_map_huge_fault(struct vm_fault *vmf, unsigned int order)
   146	{
   147		struct inode *inode = file_inode(vmf->vma->vm_file);
   148		bool write_fault = (vmf->flags & FAULT_FLAG_WRITE) && (vmf->vma->vm_flags & VM_SHARED);
   149		vm_fault_t ret;
 > 150		unsigned long pfn;
   151	
   152		if (WARN_ON_ONCE(!IS_DAX(inode)))
   153			return VM_FAULT_SIGBUS;
   154	
   155		if (write_fault) {
   156			sb_start_pagefault(inode->i_sb);
   157			file_update_time(vmf->vma->vm_file);
   158		}
   159	
   160		filemap_invalidate_lock_shared(inode->i_mapping);
   161	
   162		ret = dax_iomap_fault(vmf, order, &pfn, NULL, &fuse_ext_map_iomap_ops);
   163		if (ret & VM_FAULT_NEEDDSYNC)
   164			ret = dax_finish_sync_fault(vmf, order, pfn);
   165	
   166		filemap_invalidate_unlock_shared(inode->i_mapping);
   167	
   168		if (write_fault)
   169			sb_end_pagefault(inode->i_sb);
   170	
   171		return ret;
   172	}
   173	

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