--- /dev/null
+dnl #
+dnl # 2.6.x API change
+dnl #
+AC_DEFUN([ZFS_AC_KERNEL_RQ_IS_SYNC], [
+ AC_MSG_CHECKING([whether rq_is_sync() is available])
+ ZFS_LINUX_TRY_COMPILE([
+ #include <linux/blkdev.h>
+ ],[
+ struct request *req = NULL;
+ (void) rq_is_sync(req);
+ ],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_RQ_IS_SYNC, 1,
+ [rq_is_sync() is available])
+ ],[
+ AC_MSG_RESULT(no)
+ ])
+])