[PATCH V4 22/38] x86/intel_rdt: Add check to determine if monitoring in progress

[Reinette Chatre <reinette.chatre@intel.com>]

When a resource group is pseudo-locked it is orphaned without a class of
service associated with it. We thus do not want any monitoring in
progress on a resource group that will be used for pseudo-locking.

Introduce a test that can be used to determine if pseudo-locking in
progress on a resource group. Temporarily mark it as unused to avoid
compile warnings until it is used.

Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
---
 arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c b/arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c
index dc79b3090ac5..8693dbe602a2 100644
--- a/arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c
+++ b/arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c
@@ -14,6 +14,19 @@
 #include "intel_rdt.h"
 
 /**
+ * rdtgroup_monitor_in_progress - Test if monitoring in progress
+ * @r: resource group being queried
+ *
+ * Return: 1 if monitor groups have been created for this resource
+ * group, 0 otherwise.
+ */
+static int __attribute__ ((unused))
+rdtgroup_monitor_in_progress(struct rdtgroup *rdtgrp)
+{
+	return !list_empty(&rdtgrp->mon.crdtgrp_list);
+}
+
+/**
  * rdtgroup_locksetup_user_restrict - Restrict user access to group
  * @rdtgrp: resource group needing access restricted
  *
-- 
2.13.6