1 files changed, 41 insertions, 0 deletions
diff --git a/backport-include/linux/math64.h b/backport-include/linux/math64.h
new file mode 100644
index 0000000..7f3a81b
--- /dev/null
+++ b/backport-include/linux/math64.h
@@ -0,0 +1,41 @@
+#ifndef _COMPAT_LINUX_MATH64_H
+#define _COMPAT_LINUX_MATH64_H 1
+
+#include <linux/version.h>
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,25))
+#include_next <linux/math64.h>
+#endif /* (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,25)) */
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,26)
+#if BITS_PER_LONG == 64
+
+static inline u64 div_u64_rem(u64 dividend, u32 divisor, u32 *remainder)
+{
+	*remainder = dividend % divisor;
+	return dividend / divisor;
+}
+
+#elif BITS_PER_LONG == 32
+
+#ifndef div_u64_rem
+static inline u64 div_u64_rem(u64 dividend, u32 divisor, u32 *remainder)
+{
+	*remainder = do_div(dividend, divisor);
+	return dividend;
+}
+#endif
+
+#endif /* BITS_PER_LONG */
+
+#ifndef div_u64
+static inline u64 div_u64(u64 dividend, u32 divisor)
+{
+	u32 remainder;
+	return div_u64_rem(dividend, divisor, &remainder);
+}
+#endif
+
+#endif /* LINUX_VERSION_CODE < KERNEL_VERSION(2,6,26) */
+
+#endif	/* _COMPAT_LINUX_MATH64_H */