This patch creates a cfq optional operations framework.
This framework defines specific functions for expanding CFQ.
Signed-off-by: Satoshi UCHIDA <uchida@xxxxxxxxxxxxx>
diff --git a/block/cfq-cgroup.c b/block/cfq-cgroup.c
index b5303d9..95663f9 100644
--- a/block/cfq-cgroup.c
+++ b/block/cfq-cgroup.c
@@ -151,3 +151,7 @@ struct cgroup_subsys cfq_cgroup_subsys = {
.subsys_id = cfq_cgroup_subsys_id,
.populate = cfq_cgroup_populate,
};
+
+
+struct cfq_ops opt = {
+};
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index aaf5d7e..245c252 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -2233,6 +2233,11 @@ static void __exit cfq_exit(void)
module_init(cfq_init);
module_exit(cfq_exit);
+#ifndef CONFIG_CGROUP_CFQ
+struct cfq_ops opt = {
+};
+#endif
+
MODULE_AUTHOR("Jens Axboe");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Completely Fair Queueing IO scheduler");
diff --git a/include/linux/cfq-iosched.h b/include/linux/cfq-iosched.h
index 035bfc4..9287da1 100644
--- a/include/linux/cfq-iosched.h
+++ b/include/linux/cfq-iosched.h
@@ -87,4 +87,10 @@ static inline struct request_queue * __cfq_container_of_queue(struct work_struct
return cfqd->cfq_driv_d.queue;
};
+struct cfq_ops
+{
+};
+
+extern struct cfq_ops opt;
+
#endif /* _LINUX_CFQ_IOSCHED_H */
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