+dnl #
+dnl # 2.6.28 API change
+dnl # Device, transport, and driver FAILFAST flags were added and
+dnl # the now legacy BIO_RW_FAILFAST flag was removed.
+dnl #
+AC_DEFUN([ZFS_AC_KERNEL_BIO_FAILFAST], [
+ AC_MSG_CHECKING([whether BIO_RW_FAILFAST_* are defined])
+ ZFS_LINUX_TRY_COMPILE([
+ #include <linux/bio.h>
+ ],[
+ int flags;
+ flags = ((1 << BIO_RW_FAILFAST_DEV) |
+ (1 << BIO_RW_FAILFAST_TRANSPORT) |
+ (1 << BIO_RW_FAILFAST_DRIVER));
+ ],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_BIO_RW_FAILFAST, 1,
+ [BIO_RW_FAILFAST_* are defined])
+ ],[
+ AC_MSG_RESULT(no)
+ ])
+])