[PATCH v2 4/6] xen: Get idle data from alternative source

[Daniel Kiper]

idle member was removed from struct schedule_data by 21422 changeset
(Fix CPU hotplug after percpu data handling changes). Get idle data
from alternative source.

Signed-off-by: Daniel Kiper <daniel.kiper at oracle.com>

diff -Npru crash-6.0.8.orig/xen_hyper.c crash-6.0.8/xen_hyper.c
--- crash-6.0.8.orig/xen_hyper.c	2012-07-05 16:05:31.000000000 +0200
+++ crash-6.0.8/xen_hyper.c	2012-07-05 16:08:52.000000000 +0200
@@ -397,7 +397,8 @@ xen_hyper_misc_init(void)
 	XEN_HYPER_STRUCT_SIZE_INIT(schedule_data, "schedule_data");
 	XEN_HYPER_MEMBER_OFFSET_INIT(schedule_data_schedule_lock, "schedule_data", "schedule_lock");
 	XEN_HYPER_MEMBER_OFFSET_INIT(schedule_data_curr, "schedule_data", "curr");
-	XEN_HYPER_MEMBER_OFFSET_INIT(schedule_data_idle, "schedule_data", "idle");
+	if (MEMBER_EXISTS("schedule_data", "idle"))
+		XEN_HYPER_MEMBER_OFFSET_INIT(schedule_data_idle, "schedule_data", "idle");
 	XEN_HYPER_MEMBER_OFFSET_INIT(schedule_data_sched_priv, "schedule_data", "sched_priv");
 	XEN_HYPER_MEMBER_OFFSET_INIT(schedule_data_s_timer, "schedule_data", "s_timer");
 	XEN_HYPER_MEMBER_OFFSET_INIT(schedule_data_tick, "schedule_data", "tick");
@@ -539,7 +540,10 @@ xen_hyper_schedule_init(void)
 		}
 		schc->cpu_id = cpuid;
 		schc->curr = ULONG(buf + XEN_HYPER_OFFSET(schedule_data_curr));
-		schc->idle = ULONG(buf + XEN_HYPER_OFFSET(schedule_data_idle));
+		if (MEMBER_EXISTS("schedule_data", "idle"))
+			schc->idle = ULONG(buf + XEN_HYPER_OFFSET(schedule_data_idle));
+		else
+			schc->idle = xht->idle_vcpu_array[cpuid];
 		schc->sched_priv =
 			ULONG(buf + XEN_HYPER_OFFSET(schedule_data_sched_priv));
 		if (XEN_HYPER_VALID_MEMBER(schedule_data_tick))