autofs4: correct offset mount expire check

[linux-2.6-omap-h63xx.git] / include / linux / math64.h

diff --git a/include/linux/math64.h b/include/linux/math64.h
index c1a5f81501ff9f3f16edbd9c8e10aec48408aeee..c87f1528703a68c2dd024d612a203ae4517b5cea 100644 (file)
--- a/include/linux/math64.h
+++ b/include/linux/math64.h
@@ -81,4 +81,25 @@ static inline s64 div_s64(s64 dividend, s32 divisor)
 }
 #endif
 
+u32 iter_div_u64_rem(u64 dividend, u32 divisor, u64 *remainder);
+
+static __always_inline u32
+__iter_div_u64_rem(u64 dividend, u32 divisor, u64 *remainder)
+{
+       u32 ret = 0;
+
+       while (dividend >= divisor) {
+               /* The following asm() prevents the compiler from
+                  optimising this loop into a modulo operation.  */
+               asm("" : "+rm"(dividend));
+
+               dividend -= divisor;
+               ret++;
+       }
+
+       *remainder = dividend;
+
+       return ret;
+}
+
 #endif /* _LINUX_MATH64_H */