[CIFS] CIFS Stats improvements

New cifs_writepages routine was not updated bytes written in cifs stats.
Also added ability to clear /proc/fs/cifs/Stats by writing (0 or 1) to it.
Signed-off-by: Steve French <sfrench@us.ibm.com>
diff --git a/fs/cifs/netmisc.c b/fs/cifs/netmisc.c
index 29e6efc..f781468 100644
--- a/fs/cifs/netmisc.c
+++ b/fs/cifs/netmisc.c
@@ -813,7 +813,7 @@
 	if (smb->Flags2 & SMBFLG2_ERR_STATUS) {
 		/* translate the newer STATUS codes to old style errors and then to POSIX errors */
 		__u32 err = le32_to_cpu(smb->Status.CifsError);
-		if(cifsFYI)
+		if(cifsFYI & CIFS_RC)
 			cifs_print_status(err);
 		ntstatus_to_dos(err, &smberrclass, &smberrcode);
 	} else {