1 files changed, 22 insertions, 6 deletions

diff --git a/arch/ppc64/boot/prom.c b/arch/ppc64/boot/prom.c
index 7b607d1862cb..d5218b15824e 100644
--- a/arch/ppc64/boot/prom.c
+++ b/arch/ppc64/boot/prom.c
@@ -11,6 +11,23 @@
 #include <linux/string.h>
 #include <linux/ctype.h>
 
+extern __u32 __div64_32(unsigned long long *dividend, __u32 divisor);
+
+/* The unnecessary pointer compare is there
+ * to check for type safety (n must be 64bit)
+ */
+# define do_div(n,base) ({                              \
+        __u32 __base = (base);                  \
+        __u32 __rem;                                    \
+        (void)(((typeof((n)) *)0) == ((unsigned long long *)0));        \
+        if (((n) >> 32) == 0) {                 \
+                __rem = (__u32)(n) % __base;            \
+                (n) = (__u32)(n) / __base;              \
+        } else                                          \
+                __rem = __div64_32(&(n), __base);       \
+        __rem;                                          \
+ })
+
 int (*prom)(void *);
 
 void *chosen_handle;
@@ -352,7 +369,7 @@ static int skip_atoi(const char **s)
 #define SPECIAL 32              /* 0x */
 #define LARGE   64              /* use 'ABCDEF' instead of 'abcdef' */
 
-static char * number(char * str, long num, int base, int size, int precision, int type)
+static char * number(char * str, unsigned long long num, int base, int size, int precision, int type)
 {
         char c,sign,tmp[66];
         const char *digits="0123456789abcdefghijklmnopqrstuvwxyz";
@@ -367,9 +384,9 @@ static char * number(char * str, long num, int base, int size, int precision, in
         c = (type & ZEROPAD) ? '0' : ' ';
         sign = 0;
         if (type & SIGN) {
-                if (num < 0) {
+                if ((signed long long)num < 0) {
                         sign = '-';
-                        num = -num;
+                        num = - (signed long long)num;
                         size--;
                 } else if (type & PLUS) {
                         sign = '+';
@@ -389,8 +406,7 @@ static char * number(char * str, long num, int base, int size, int precision, in
         if (num == 0)
                 tmp[i++]='0';
         else while (num != 0) {
-                tmp[i++] = digits[num % base];
-                num /= base;
+                tmp[i++] = digits[do_div(num, base)];
         }
         if (i > precision)
                 precision = i;
@@ -426,7 +442,7 @@ int sprintf(char * buf, const char *fmt, ...);
 int vsprintf(char *buf, const char *fmt, va_list args)
 {
         int len;
-        unsigned long num;
+        unsigned long long num;
         int i, base;
         char * str;
         const char *s;