Commit-ID: 8938db1da6e73ef2217c7ae304a89f8e29ad22c7
Gitweb: https://git.kernel.org/tip/8938db1da6e73ef2217c7ae304a89f8e29ad22c7
Author: Reinette Chatre <reinette.chatre@xxxxxxxxx>
AuthorDate: Tue, 29 May 2018 05:57:47 -0700
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Wed, 20 Jun 2018 00:56:35 +0200
x86/intel_rdt: Add check to determine if monitoring in progress
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@xxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: fenghua.yu@xxxxxxxxx
Cc: tony.luck@xxxxxxxxx
Cc: vikas.shivappa@xxxxxxxxxxxxxxx
Cc: gavin.hindman@xxxxxxxxx
Cc: jithu.joseph@xxxxxxxxx
Cc: dave.hansen@xxxxxxxxx
Cc: hpa@xxxxxxxxx
Link: https://lkml.kernel.org/r/d3efe6b526e28e335463578870ec7d5dc91ed96d.1527593971.git.reinette.chatre@xxxxxxxxx
---
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
@@ -13,6 +13,19 @@
#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
--
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