[ceph-client:testing 2/2] fs/ceph/file.c:615:2: warning: format '%ld' expects argument of type 'long int', but argument 2 has type 'ssize_t'

[kbuild test robot <fengguang.wu@xxxxxxxxx>]

tree:   https://github.com/ceph/ceph-client.git testing
head:   cf30eb1d9821be4e575321a518221172b222d893
commit: cf30eb1d9821be4e575321a518221172b222d893 [2/2] ceph: fix splice read for no Fc capability case
config: i386-randconfig-c0-11090107 (attached as .config)
compiler: gcc-4.9 (Debian 4.9.4-2) 4.9.4
reproduce:
        git checkout cf30eb1d9821be4e575321a518221172b222d893
        # save the attached .config to linux build tree
        make ARCH=i386 

All warnings (new ones prefixed by >>):

   fs/ceph/file.c: In function 'ceph_sync_read':
>> fs/ceph/file.c:615:2: warning: format '%ld' expects argument of type 'long int', but argument 2 has type 'ssize_t' [-Wformat=]
     dout("sync_read result %ld\n", ret);
     ^

vim +615 fs/ceph/file.c

   599					l = copy_page_to_iter(pages[k++], page_off,
   600							      copy, to);
   601					off += l;
   602					left -= l;
   603					if (l < copy)
   604						break;
   605				}
   606			}
   607			ceph_release_page_vector(pages, num_pages);
   608		}
   609	
   610		if (off > iocb->ki_pos) {
   611			ret = off - iocb->ki_pos;
   612			iocb->ki_pos = off;
   613		}
   614	
 > 615		dout("sync_read result %ld\n", ret);
   616		return ret;
   617	}
   618	
   619	struct ceph_aio_request {
   620		struct kiocb *iocb;
   621		size_t total_len;
   622		int write;
   623		int error;

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