mirror_zfs/config/kernel-get-disk-ro.m4
Brian Behlendorf c9c0d073da Add build system
Add autoconf style build infrastructure to the ZFS tree.  This
includes autogen.sh, configure.ac, m4 macros, some scripts/*,
and makefiles for all the core ZFS components.
2010-08-31 13:41:27 -07:00

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dnl #
dnl # 2.6.x API change
dnl #
AC_DEFUN([ZFS_AC_KERNEL_GET_DISK_RO], [
AC_MSG_CHECKING([whether get_disk_ro() is available])
ZFS_LINUX_TRY_COMPILE([
#include <linux/blkdev.h>
],[
struct gendisk *disk = NULL;
(void) get_disk_ro(disk);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_GET_DISK_RO, 1,
[blk_disk_ro() is available])
],[
AC_MSG_RESULT(no)
])
])