freebsd-dev/config/kernel-invalidate-bdev-args.m4

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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)
])
])