X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=lib%2Fdiv64.c;h=a111eb8de9cfeefb2bc82011ef580f970091bfcd;hb=1356de06cea80ffc84cde6a4f8779414f20f211e;hp=b71cf93c529adaa3364afa4a1b997c54cc9ef363;hpb=cb8c181f288a1157bc717cc7a02412d4d1dc19bc;p=safe%2Fjmp%2Flinux-2.6

diff --git a/lib/div64.c b/lib/div64.c
index b71cf93..a111eb8 100644
--- a/lib/div64.c
+++ b/lib/div64.c
@@ -16,9 +16,8 @@
  * assembly versions such as arch/ppc/lib/div64.S and arch/sh/lib/div64.S.
  */
 
-#include <linux/types.h>
 #include <linux/module.h>
-#include <asm/div64.h>
+#include <linux/math64.h>
 
 /* Not needed on 64bit architectures */
 #if BITS_PER_LONG == 32
@@ -58,10 +57,31 @@ uint32_t __attribute__((weak)) __div64_32(uint64_t *n, uint32_t base)
 
 EXPORT_SYMBOL(__div64_32);
 
+#ifndef div_s64_rem
+s64 div_s64_rem(s64 dividend, s32 divisor, s32 *remainder)
+{
+	u64 quotient;
+
+	if (dividend < 0) {
+		quotient = div_u64_rem(-dividend, abs(divisor), (u32 *)remainder);
+		*remainder = -*remainder;
+		if (divisor > 0)
+			quotient = -quotient;
+	} else {
+		quotient = div_u64_rem(dividend, abs(divisor), (u32 *)remainder);
+		if (divisor < 0)
+			quotient = -quotient;
+	}
+	return quotient;
+}
+EXPORT_SYMBOL(div_s64_rem);
+#endif
+
 /* 64bit divisor, dividend and result. dynamic precision */
-uint64_t div64_64(uint64_t dividend, uint64_t divisor)
+#ifndef div64_u64
+u64 div64_u64(u64 dividend, u64 divisor)
 {
-	uint32_t high, d;
+	u32 high, d;
 
 	high = divisor >> 32;
 	if (high) {
@@ -72,10 +92,19 @@ uint64_t div64_64(uint64_t dividend, uint64_t divisor)
 	} else
 		d = divisor;
 
-	do_div(dividend, d);
-
-	return dividend;
+	return div_u64(dividend, d);
 }
-EXPORT_SYMBOL(div64_64);
+EXPORT_SYMBOL(div64_u64);
+#endif
 
 #endif /* BITS_PER_LONG == 32 */
+
+/*
+ * Iterative div/mod for use when dividend is not expected to be much
+ * bigger than divisor.
+ */
+u32 iter_div_u64_rem(u64 dividend, u32 divisor, u64 *remainder)
+{
+	return __iter_div_u64_rem(dividend, divisor, remainder);
+}
+EXPORT_SYMBOL(iter_div_u64_rem);