zfs-builds-mm/zfs-0.8.3/config/kernel-get-disk-ro.m4

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