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authorGreg Kroah-Hartman <gregkh@suse.de>2007-11-01 19:41:16 -0700
committerGreg Kroah-Hartman <gregkh@suse.de>2008-01-24 20:40:33 -0800
commitc6f7e72a3f4641095ade9ded287d910c980c6148 (patch)
treed2d7d946b978ce9f5586a02c3520aa76e928a551 /drivers/base/base.h
parentb249072ee6897fe4f8d461c7bb4b926223263c28 (diff)
downloadlinux-c6f7e72a3f4641095ade9ded287d910c980c6148.tar.bz2
driver core: remove fields from struct bus_type
struct bus_type is static everywhere in the kernel. This moves the kobject in the structure out of it, and a bunch of other private only to the driver core fields are now moved to a private structure. This lets us dynamically create the backing kobject properly and gives us the chance to be able to document to users exactly how to use the struct bus_type as there are no fields they can improperly access. Thanks to Kay for the build fixes on this patch. Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/base/base.h')
-rw-r--r--drivers/base/base.h30
1 files changed, 29 insertions, 1 deletions
diff --git a/drivers/base/base.h b/drivers/base/base.h
index 7e309a49a711..ca6d273064f8 100644
--- a/drivers/base/base.h
+++ b/drivers/base/base.h
@@ -1,6 +1,34 @@
-/* initialisation functions */
+/**
+ * struct bus_type_private - structure to hold the private to the driver core portions of the bus_type structure.
+ *
+ * @subsys - the struct kset that defines this bus. This is the main kobject
+ * @drivers_kset - the list of drivers associated with this bus
+ * @devices_kset - the list of devices associated with this bus
+ * @klist_devices - the klist to iterate over the @devices_kset
+ * @klist_drivers - the klist to iterate over the @drivers_kset
+ * @bus_notifier - the bus notifier list for anything that cares about things
+ * on this bus.
+ * @bus - pointer back to the struct bus_type that this structure is associated
+ * with.
+ *
+ * This structure is the one that is the actual kobject allowing struct
+ * bus_type to be statically allocated safely. Nothing outside of the driver
+ * core should ever touch these fields.
+ */
+struct bus_type_private {
+ struct kset subsys;
+ struct kset *drivers_kset;
+ struct kset *devices_kset;
+ struct klist klist_devices;
+ struct klist klist_drivers;
+ struct blocking_notifier_head bus_notifier;
+ unsigned int drivers_autoprobe:1;
+ struct bus_type *bus;
+};
+
+/* initialisation functions */
extern int devices_init(void);
extern int buses_init(void);
extern int classes_init(void);