--- include/linux/kernel.h

+++ include/linux/kernel.h

@@ -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)