config/kernel-hotplug.m4

   1 dnl #
   2 dnl # 4.6 API change
   3 dnl # Added CPU hotplug APIs
   4 dnl #
   5 AC_DEFUN([ZFS_AC_KERNEL_SRC_CPU_HOTPLUG], [
   6         ZFS_LINUX_TEST_SRC([cpu_hotplug], [
   7                 #include <linux/cpuhotplug.h>
   8         ],[
   9                 enum cpuhp_state state = CPUHP_ONLINE;
  10                 int (*fp)(unsigned int, struct hlist_node *) = NULL;
  11                 cpuhp_state_add_instance_nocalls(0, (struct hlist_node *)NULL);
  12                 cpuhp_state_remove_instance_nocalls(0, (struct hlist_node *)NULL);
  13                 cpuhp_setup_state_multi(state, "", fp, fp);
  14                 cpuhp_remove_multi_state(0);
  15         ])
  16 ])
  17
  18 AC_DEFUN([ZFS_AC_KERNEL_CPU_HOTPLUG], [
  19         AC_MSG_CHECKING([whether CPU hotplug APIs exist])
  20         ZFS_LINUX_TEST_RESULT([cpu_hotplug], [
  21                 AC_MSG_RESULT(yes)
  22                 AC_DEFINE(HAVE_CPU_HOTPLUG, 1, [yes])
  23         ],[
  24                 AC_MSG_RESULT(no)
  25         ])
  26 ])