staging/lustre: Get rid of an ugly statfs hack in lov_iocontrol

For some crazy reason ll_obd_statfs decided to decode async flag
passed from userspace and then pass it via a userspace pointer
argument to lov_iocontrol.
This patch moves flags decoding to lov_iocontrol where it belongs.
Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/lustre/lustre/llite/llite_lib.c

@@ -2026,7 +2026,6 @@ int ll_obd_statfs(struct inode *inode, void *arg)
 	char *buf = NULL;
 	struct obd_ioctl_data *data = NULL;
 	__u32 type;
-	__u32 flags;
 	int len = 0, rc;
 
 	if (!inode) {
@@ -2069,8 +2068,7 @@ int ll_obd_statfs(struct inode *inode, void *arg)
 		goto out_statfs;
 	}
 
-	flags = (type & LL_STATFS_NODELAY) ? OBD_STATFS_NODELAY : 0;
-	rc = obd_iocontrol(IOC_OBD_STATFS, exp, len, buf, &flags);
+	rc = obd_iocontrol(IOC_OBD_STATFS, exp, len, buf, NULL);
 	if (rc)
 		goto out_statfs;
 out_statfs:

drivers/staging/lustre/lustre/lov/lov_obd.c

@@ -1420,7 +1420,9 @@ static int lov_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
 					 (int) sizeof(struct obd_uuid))))
 			return -EFAULT;
 
-		flags = uarg ? *(__u32 *)uarg : 0;
+		memcpy(&flags, data->ioc_inlbuf1, sizeof(__u32));
+		flags = flags & LL_STATFS_NODELAY ? OBD_STATFS_NODELAY : 0;
+
 		/* got statfs data */
 		rc = obd_statfs(NULL, lov->lov_tgts[index]->ltd_exp, &stat_buf,
 				cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),