diff --git a/fs/cifs/cifspdu.h b/fs/cifs/cifspdu.h
index 5050542..6df9dad 100644
--- a/fs/cifs/cifspdu.h
+++ b/fs/cifs/cifspdu.h
@@ -409,6 +409,8 @@
 
 /* Dialect index is 13 for LANMAN */
 
+#define MIN_TZ_ADJ (15 * 60) /* minimum grid for timezones in seconds */
+
 typedef struct lanman_neg_rsp {
 	struct smb_hdr hdr;	/* wct = 13 */
 	__le16 DialectIndex;
@@ -678,7 +680,7 @@
 typedef struct smb_com_close_req {
 	struct smb_hdr hdr;	/* wct = 3 */
 	__u16 FileID;
-	__u32 LastWriteTime;	/* should be zero */
+	__u32 LastWriteTime;	/* should be zero or -1 */
 	__u16 ByteCount;	/* 0 */
 } __attribute__((packed)) CLOSE_REQ;