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author | Greg Kroah-Hartman <gregkh@suse.de> | 2007-11-01 19:41:16 -0700 |
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committer | Greg Kroah-Hartman <gregkh@suse.de> | 2008-01-24 20:40:33 -0800 |
commit | c6f7e72a3f4641095ade9ded287d910c980c6148 (patch) | |
tree | d2d7d946b978ce9f5586a02c3520aa76e928a551 /drivers/base/base.h | |
parent | b249072ee6897fe4f8d461c7bb4b926223263c28 (diff) | |
download | linux-stable-c6f7e72a3f4641095ade9ded287d910c980c6148.tar.gz linux-stable-c6f7e72a3f4641095ade9ded287d910c980c6148.tar.bz2 linux-stable-c6f7e72a3f4641095ade9ded287d910c980c6148.zip |
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.h | 30 |
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); |