[PATCH] kset: make ksets have a spinlock, and use that to lock their lists

Do this instead of using the rwsem of a subsys.
Smaller, faster, and I'm trying to get rid of the rwsem in the subsys.

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/linux/kobject.h b/include/linux/kobject.h
index dc773d4043e8..765d660d3bea 100644
--- a/include/linux/kobject.h
+++ b/include/linux/kobject.h
@@ -20,6 +20,7 @@
 #include <linux/types.h>
 #include <linux/list.h>
 #include <linux/sysfs.h>
+#include <linux/spinlock.h>
 #include <linux/rwsem.h>
 #include <linux/kref.h>
 #include <linux/kobject_uevent.h>
@@ -102,6 +103,7 @@ struct kset {
 	struct subsystem	* subsys;
 	struct kobj_type	* ktype;
 	struct list_head	list;
+	spinlock_t		list_lock;
 	struct kobject		kobj;
 	struct kset_hotplug_ops	* hotplug_ops;
 };