dnl #
AC_DEFUN([ZFS_AC_KERNEL_RQ_IS_SYNC], [
AC_MSG_CHECKING([whether rq_is_sync() is available])
+ tmp_flags="$EXTRA_KCFLAGS"
+ EXTRA_KCFLAGS="-Wno-unused-but-set-variable"
ZFS_LINUX_TRY_COMPILE([
#include <linux/blkdev.h>
],[
],[
AC_MSG_RESULT(no)
])
+ EXTRA_KCFLAGS="$tmp_flags"
])