dnl #
dnl # 2.6.22 API change
dnl # Unused destroy_dirty_buffers arg removed from prototype.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_INVALIDATE_BDEV_ARGS], [
	AC_MSG_CHECKING([whether invalidate_bdev() wants 1 arg])
	ZFS_LINUX_TRY_COMPILE([
		#include <linux/buffer_head.h>
	],[
		struct block_device *bdev = NULL;
		invalidate_bdev(bdev);
	],[
		AC_MSG_RESULT(yes)
		AC_DEFINE(HAVE_1ARG_INVALIDATE_BDEV, 1,
		          [invalidate_bdev() wants 1 arg])
	],[
		AC_MSG_RESULT(no)
	])
])