diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index f4fc576..25fccd8 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -24,6 +24,9 @@
 #define LONG_MAX	((long)(~0UL>>1))
 #define LONG_MIN	(-LONG_MAX - 1)
 #define ULONG_MAX	(~0UL)
+#define LLONG_MAX	((long long)(~0ULL>>1))
+#define LLONG_MIN	(-LLONG_MAX - 1)
+#define ULLONG_MAX	(~0ULL)
 
 #define STACK_MAGIC	0xdeadbeef
 
diff --git a/include/linux/writeback.h b/include/linux/writeback.h
index 56f92fc..9e38b56 100644
--- a/include/linux/writeback.h
+++ b/include/linux/writeback.h
@@ -50,14 +50,15 @@
 	 * a hint that the filesystem need only write out the pages inside that
 	 * byterange.  The byte at `end' is included in the writeout request.
 	 */
-	loff_t start;
-	loff_t end;
+	loff_t range_start;
+	loff_t range_end;
 
 	unsigned nonblocking:1;		/* Don't get stuck on request queues */
 	unsigned encountered_congestion:1; /* An output: a queue is full */
 	unsigned for_kupdate:1;		/* A kupdate writeback */
 	unsigned for_reclaim:1;		/* Invoked from the page allocator */
 	unsigned for_writepages:1;	/* This is a writepages() call */
+	unsigned range_cyclic:1;	/* range_start is cyclic */
 };
 
 /*