[openeuler:OLK-5.10 2610/2610] fs/cachefiles/rdwr.c:860:6: warning: no previous prototype for function 'cachefiles_readpages_work_func'

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

tree:   https://gitee.com/openeuler/kernel.git OLK-5.10
head:   8bba4b17284e774544bd01d9ea5190546e93a849
commit: 33ba25cc4869bab81ad31784e7bbb25e5da2a2ad [2610/2610] anolis: fscache,cachefiles: add fscache_prepare_read() helper
config: x86_64-buildonly-randconfig-001-20241230 (https://download.01.org/0day-ci/archive/20241231/202412310255.QS4rGSOC-lkp@intel.com/config)
compiler: clang version 19.1.3 (https://github.com/llvm/llvm-project ab51eccf88f5321e7c60591c5546b254b6afab99)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241231/202412310255.QS4rGSOC-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/202412310255.QS4rGSOC-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from fs/cachefiles/rdwr.c:11:
   In file included from include/linux/swap.h:10:
   In file included from include/linux/memcontrol.h:13:
   In file included from include/linux/cgroup.h:28:
   In file included from include/linux/cgroup-defs.h:22:
   In file included from include/linux/bpf-cgroup.h:5:
   In file included from include/linux/bpf.h:21:
   In file included from include/linux/kallsyms.h:12:
   In file included from include/linux/mm.h:1587:
   include/linux/vmstat.h:431:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
     431 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
         |                               ~~~~~~~~~~~ ^ ~~~
>> fs/cachefiles/rdwr.c:860:6: warning: no previous prototype for function 'cachefiles_readpages_work_func' [-Wmissing-prototypes]
     860 | void cachefiles_readpages_work_func(struct work_struct *work)
         |      ^
   fs/cachefiles/rdwr.c:860:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     860 | void cachefiles_readpages_work_func(struct work_struct *work)
         | ^
         | static 
   2 warnings generated.


vim +/cachefiles_readpages_work_func +860 fs/cachefiles/rdwr.c

   859	
 > 860	void cachefiles_readpages_work_func(struct work_struct *work)
   861	{
   862		struct cachefiles_kiocb *ki = container_of(work, struct cachefiles_kiocb, work);
   863		int ret;
   864	
   865		ret = vfs_iocb_iter_read(ki->iocb.ki_filp, &ki->iocb, &ki->iter);
   866		/* complete the request if there's any progress or error occurred */
   867		if (ret != -EIOCBQUEUED) {
   868			struct fscache_retrieval *op = ki->op;
   869			unsigned int nr_pages = atomic_read(&op->n_pages);
   870			unsigned int done_pages = 0;
   871			int i, error;
   872	
   873			if (ret > 0)
   874				done_pages = ret / PAGE_SIZE;
   875	
   876			for (i = 0; i < nr_pages; i++) {
   877				error = i < done_pages ? 0 : -EIO;
   878				fscache_end_io(op, ki->bvs[i].bv_page, error);
   879			}
   880	
   881			fscache_retrieval_complete(op, nr_pages);
   882			fscache_put_retrieval(op);
   883			kfree(ki);
   884		}
   885	}
   886	

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