diff --git a/sys/compat/linuxkpi/common/include/linux/bitops.h b/sys/compat/linuxkpi/common/include/linux/bitops.h
--- a/sys/compat/linuxkpi/common/include/linux/bitops.h
+++ b/sys/compat/linuxkpi/common/include/linux/bitops.h
@@ -437,4 +437,10 @@
 	return ((int32_t)(value << shift) >> shift);
 }
 
+static inline uint64_t
+rol64(uint64_t word, unsigned int shift)
+{
+	return ((word << (shift & 63)) | (word >> ((-shift) & 63)));
+}
+
 #endif	/* _LINUXKPI_LINUX_BITOPS_H_ */