--- da3e76d00105d5b8a129fec75f359c3397fe7142
+++ 3a2c1856e027d0dd5c569f8aca37881342a45141
@@ -37,6 +37,8 @@
 
 #define STACK_MAGIC	0xdeadbeef
 
+#define REPEAT_BYTE(x)	((~0ul / 0xff) * (x))
+
 #define ALIGN(x, a)		__ALIGN_KERNEL((x), (a))
 #define __ALIGN_MASK(x, mask)	__ALIGN_KERNEL_MASK((x), (mask))
 #define PTR_ALIGN(p, a)		((typeof(p))ALIGN((unsigned long)(p), (a)))
@@ -90,6 +92,19 @@
 )
 
 
+/*
+ * Multiplies an integer by a fraction, while avoiding unnecessary
+ * overflow or loss of precision.
+ */
+#define mult_frac(x, numer, denom)(			\
+{							\
+	typeof(x) quot = (x) / (denom);			\
+	typeof(x) rem  = (x) % (denom);			\
+	(quot * (numer)) + ((rem * (numer)) / (denom));	\
+}							\
+)
+
+
 #define _RET_IP_		(unsigned long)__builtin_return_address(0)
 #define _THIS_IP_  ({ __label__ __here; __here: (unsigned long)&&__here; })
 
@@ -301,6 +316,7 @@ extern long long simple_strtoll(const ch
 #define strict_strtoull	kstrtoull
 #define strict_strtoll	kstrtoll
 
+extern int num_to_str(char *buf, int size, unsigned long long num);
 extern int sprintf(char * buf, const char * fmt, ...)
 	__attribute__ ((format (printf, 2, 3)));
 extern int vsprintf(char *buf, const char *, va_list)