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* kobject: add sample code for how to use ksets/ktypes/kobjectsGreg Kroah-Hartman2008-01-242-1/+279
| | | | | | | | | This is a more complex example showing how to create a kset and a ktype and some default attributes for a group of kobjects. Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* kobject: add sample code for how to use kobjects in a simple manner.Greg Kroah-Hartman2008-01-244-1/+149
| | | | | | | | | This is a simple kobject module, showing how to use kobj_attributes in basic and more complex ways. Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* kobject: update the kobject/kset documentationGreg Kroah-Hartman2008-01-241-0/+386
| | | | | | | | | | | | This provides a much-needed kobject and kset documentation update. Thanks to Kay Sievers, Alan Stern, Jonathan Corbet, Randy Dunlap, Jan Engelhardt, and others for reviewing and providing help with this document. Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* kobject: remove old, outdated documentation.Greg Kroah-Hartman2008-01-241-289/+0
| | | | | | | | | As we are replacing the documentation, it's easier to do this in a two stage pass, delete the old file and add the new one. Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Driver core: change sysdev classes to use dynamic kobject namesKay Sievers2008-01-2455-73/+62
| | | | | | | | | | All kobjects require a dynamically allocated name now. We no longer need to keep track if the name is statically assigned, we can just unconditionally free() all kobject names on cleanup. Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Kobject: remove kobject_unregister() as no one uses it anymoreGreg Kroah-Hartman2008-01-242-19/+0
| | | | | | | | There are no in-kernel users of kobject_unregister() so it should be removed. Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Kobject: convert remaining kobject_unregister() to kobject_put()Greg Kroah-Hartman2008-01-245-10/+9
| | | | | | | | | | | There is no need for kobject_unregister() anymore, thanks to Kay's kobject cleanup changes, so replace all instances of it with kobject_put(). Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Kobject: convert fs/* from kobject_unregister() to kobject_put()Greg Kroah-Hartman2008-01-248-18/+18
| | | | | | | | | | | There is no need for kobject_unregister() anymore, thanks to Kay's kobject cleanup changes, so replace all instances of it with kobject_put(). Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Kobject: convert drivers/* from kobject_unregister() to kobject_put()Greg Kroah-Hartman2008-01-2417-42/+40
| | | | | | | | | | | There is no need for kobject_unregister() anymore, thanks to Kay's kobject cleanup changes, so replace all instances of it with kobject_put(). Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Kobject: convert arch/* from kobject_unregister() to kobject_put()Greg Kroah-Hartman2008-01-245-16/+14
| | | | | | | | | | | There is no need for kobject_unregister() anymore, thanks to Kay's kobject cleanup changes, so replace all instances of it with kobject_put(). Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Modules: remove unneeded release functionGreg Kroah-Hartman2008-01-241-10/+0
| | | | | | | | | | | | | Now that kobjects properly clean up their name structures, no matter if they have a release function or not, we can drop this empty module kobject release function too (it was needed prior to this because of the way we handled static kobject names, we based the fact that if a release function was present, then we could safely free the name string, now we are more smart about things and only free names we have previously set.) Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Kobject: auto-cleanup on final unrefKay Sievers2008-01-244-99/+119
| | | | | | | | | | | | | | | | We save the current state in the object itself, so we can do proper cleanup when the last reference is dropped. If the initial reference is dropped, the object will be removed from sysfs if needed, if an "add" event was sent, "remove" will be send, and the allocated resources are released. This allows us to clean up some driver core usage as well as allowing us to do other such changes to the rest of the kernel. Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Kset: remove kset_add functionGreg Kroah-Hartman2008-01-242-13/+1
| | | | | | | | | No one is calling this anymore, so just remove it and hard-code the one internal-use of it. Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Kobject: remove kobject_register()Greg Kroah-Hartman2008-01-242-19/+0
| | | | | | | | | | The function is no longer used by anyone in the kernel, and it prevents the proper sending of the kobject uevent after the needed files are set up by the caller. kobject_init_and_add() can be used in its place. Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Kobject: rename kobject_init_ng() to kobject_init()Greg Kroah-Hartman2008-01-2410-18/+18
| | | | | | | | | Now that the old kobject_init() function is gone, rename kobject_init_ng() to kobject_init() to clean up the namespace. Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Kobject: remove kobject_init() as no one uses it anymoreGreg Kroah-Hartman2008-01-242-9/+3
| | | | | | | | | | The old kobject_init() function is on longer in use, so let us remove it from the public scope (kset mess in the kobject.c file still uses it, but that can be cleaned up later very simply.) Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Kobject: rename kobject_add_ng() to kobject_add()Greg Kroah-Hartman2008-01-2410-22/+22
| | | | | | | | | Now that the old kobject_add() function is gone, rename kobject_add_ng() to kobject_add() to clean up the namespace. Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Kobject: remove kobject_add() as no one uses it anymoreGreg Kroah-Hartman2008-01-242-15/+8
| | | | | | | | | | The old kobject_add() function is on longer in use, so let us remove it from the public scope (kset mess in the kobject.c file still uses it, but that can be cleaned up later very simply.) Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Kobject: convert kernel/module.c to use kobject_init/add_ng()Greg Kroah-Hartman2008-01-241-8/+6
| | | | | | | | This converts the code to use the new kobject functions, cleaning up the logic in doing so. Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Kobject: convert drivers/md/md.c to use kobject_init/add_ng()Greg Kroah-Hartman2008-01-241-9/+4
| | | | | | | | | This converts the code to use the new kobject functions, cleaning up the logic in doing so. Cc: Neil Brown <neilb@suse.de> Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Kobject: convert block/ll_rw_blk.c to use kobject_init/add_ng()Greg Kroah-Hartman2008-01-241-6/+3
| | | | | | | | | This converts the code to use the new kobject functions, cleaning up the logic in doing so. Cc: Jens Axboe <axboe@kernel.dk> Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Kobject: convert block/elevator.c to use kobject_init/add_ng()Greg Kroah-Hartman2008-01-241-6/+2
| | | | | | | | | | This converts the code to use the new kobject functions, cleaning up the logic in doing so. Cc: Jens Axboe <axboe@kernel.dk> Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Driver core: convert block from raw kobjects to core devicesKay Sievers2008-01-2413-610/+385
| | | | | | | | | | | | | | | | | | | | | | | | | | This moves the block devices to /sys/class/block. It will create a flat list of all block devices, with the disks and partitions in one directory. For compatibility /sys/block is created and contains symlinks to the disks. /sys/class/block |-- sda -> ../../devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda |-- sda1 -> ../../devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda1 |-- sda10 -> ../../devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda10 |-- sda5 -> ../../devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda5 |-- sda6 -> ../../devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda6 |-- sda7 -> ../../devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda7 |-- sda8 -> ../../devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda8 |-- sda9 -> ../../devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda9 `-- sr0 -> ../../devices/pci0000:00/0000:00:1f.2/host1/target1:0:0/1:0:0:0/block/sr0 /sys/block/ |-- sda -> ../devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda `-- sr0 -> ../devices/pci0000:00/0000:00:1f.2/host1/target1:0:0/1:0:0:0/block/sr0 Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Kobject: drop child->parent ref at unregistrationAlan Stern2008-01-241-3/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | This patch (as1015) reverts changes that were made to the driver core about four years ago. The intent back then was to avoid certain kinds of invalid memory accesses by leaving kernel objects allocated as long as any of their children were still allocated. The original and correct approach was to wait only as long as any children were still _registered_; that's what this patch reinstates. This fixes a problem in the SCSI core made visible by the class_device to regular device conversion: A reference loop (scsi_device holds reference to request_queue, which is the child of a gendisk, which is the child of the scsi_device) prevents the data structures from being released, even though they are deregistered okay. It's possible that this change will cause a few bugs to surface, things that have been hidden for several years. They can be fixed easily enough by having the child device take an explicit reference to the parent whenever needed. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* sysfs: fix /sys/module/*/holders after sysfs logic changeKay Sievers2008-01-241-8/+7
| | | | | | | | | | | Sysfs symlinks now require fully registered kobjects as a target, otherwise the call to create a symlink will fail. Here we register the kobject before we request the symlink in the holders directory. Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Cc: Tejun Heo <teheo@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Driver core: fix class glue dir cleanup logicKay Sievers2008-01-241-112/+94
| | | | | | | | | | | | We should remove the glue directory between the class and the bus device _after_ we sent out the 'remove' event for the device, otherwise the parent relationship is no longer valid, and composing the path with deleted sysfs entries will not work. Cc: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Driver core: fix race in __device_release_driverAlan Stern2008-01-241-3/+2
| | | | | | | | | | | | | | | | | | This patch (as1013) was suggested by David Woodhouse; it fixes a race in the driver core. If a device is unregistered at the same time as its driver is unloaded, the driver's code pages may be unmapped while the remove method is still running. The calls to get_driver() and put_driver() were intended to prevent this, but they don't work if the driver's module count has already dropped to 0. Instead, the patch keeps the device on the driver's list until after the remove method has returned. This forces the necessary synchronization to occur. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Kobject: change drivers/base/bus to use kobject_init_and_addGreg Kroah-Hartman2008-01-241-6/+4
| | | | | | | | | Stop using kobject_register, as this way we can control the sending of the uevent properly, after everything is properly initialized. Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Driver core: clean up debugging messagesGreg Kroah-Hartman2008-01-243-25/+28
| | | | | | | | | | | | | | | | The driver core debugging messages are a mess. This provides a unified message that makes them actually useful. The format for new kobject debug messages should be: driver/bus/class: 'OBJECT_NAME': FUNCTION_NAME: message.\n Note, the class code is not changed in this patch due to pending patches in my queue that this would conflict with. A later patch will clean them up. Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Driver core: move the static kobject out of struct driverGreg Kroah-Hartman2008-01-247-74/+99
| | | | | | | | | | This patch removes the kobject, and a few other driver-core-only fields out of struct driver and into the driver core only. Now drivers can be safely create on the stack or statically (like they currently are.) Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Driver core: move the driver specific module code into the driver coreGreg Kroah-Hartman2008-01-245-102/+104
| | | | | | | | | | | | | | | The module driver specific code should belong in the driver core, not in the kernel/ directory. So move this code. This is done in preparation for some struct device_driver rework that should be confined to the driver core code only. This also lets us keep from exporting these functions, as no external code should ever be calling it. Thanks to Andrew Morton for the !CONFIG_MODULES fix. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Driver: add driver_add_kobj for looney iseries_veth driverGreg Kroah-Hartman2008-01-243-1/+29
| | | | | | | | | | | | | | The iseries driver wants to hang kobjects off of its driver, so, to preserve backwards compatibility, we need to add a call to the driver core to allow future changes to work properly. Hopefully no one uses this function in the future and the iseries_veth driver authors come to their senses so I can remove this hack... Cc: Dave Larson <larson1@us.ibm.com> Cc: Santiago Leon <santil@us.ibm.com> Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Infiniband: make ipath driver use default driver groups.Greg Kroah-Hartman2008-01-244-45/+18
| | | | | | | | | | | | | | | | Make the ipath driver use the new driver functions so that it does not touch the sysfs portion of the driver structure. We also remove the redundant symlink from the device back to the driver, as it is already in the sysfs tree. Any userspace tools should be using the standard symlink, not some driver specific one. Cc: Roland Dreier <rdreier@cisco.com> Cc: Bryan O'Sullivan <bryan.osullivan@qlogic.com> Cc: Arthur Jones <arthur.jones@qlogic.com> Cc: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* zfcp: Use device_driver default attribute groups.Cornelia Huck2008-01-243-35/+9
| | | | | | | CC: Swen Schillig <swen@vnet.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* netiucv: Use device_driver default attribute groups.Cornelia Huck2008-01-241-10/+6
| | | | | | | CC: Ursula Braun <ubraun@linux.vnet.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* driver core: Introduce default attribute groups.Cornelia Huck2008-01-242-1/+42
| | | | | | | | | This is lot like default attributes for devices (and indeed, a lot of the code is lifted from there). Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* PCI: remove foolish code from pci-driver.cGreg Kroah-Hartman2008-01-241-45/+5
| | | | | | | | | | | | The PCI bus should not be trying to declare its own attribute type. Especially as this code could never ever be called because the driver core overwrites the driver kobject type to be its own internal type. Delete all of this code as it was never being used and is not correct. Also update my copyright on the file while I'm touching things there. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* PCI: use proper call to driver_create_fileGreg Kroah-Hartman2008-01-241-2/+7
| | | | | | | | Don't try to call the "raw" sysfs_create_file when we already have a helper function to do this kind of work for us. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* PCMCIA: use proper call to driver_create_fileGreg Kroah-Hartman2008-01-241-2/+1
| | | | | | | | Don't try to call the "raw" sysfs_create_file when we already have a helper function to do this kind of work for us. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* USB: use proper call to driver_create_fileGreg Kroah-Hartman2008-01-241-4/+4
| | | | | | | | Don't try to call the "raw" sysfs_create_file when we already have a helper function to do this kind of work for us. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* driver core: remove fields from struct bus_typeGreg Kroah-Hartman2008-01-247-70/+104
| | | | | | | | | | | | | | | 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>
* driver core: add way to get to bus device klistGreg Kroah-Hartman2008-01-243-4/+14
| | | | | | | | | | | | | | | This allows an easier way to get to the device klist associated with a struct bus_type (you have three to choose from...) This will make it easier to move these fields to be dynamic in a future patch. The only user of this is the PCI core which horribly abuses this interface to rearrange the order of the pci devices. This should be done using the existing bus device walking functions, but that's left for future patches. Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* driver core: add way to get to bus ksetGreg Kroah-Hartman2008-01-243-1/+12
| | | | | | | | | | This allows an easier way to get to the kset associated with a struct bus_type (you have three to choose from...) This will make it easier to move these fields to be dynamic in a future patch. Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* driver core: remove owner field from struct bus_typeGreg Kroah-Hartman2008-01-241-1/+0
| | | | | | | | | | This isn't used by anything in the driver core, and by no one in the 204 different usages of it in the kernel tree. Remove this field so no one gets any idea that it is needed to be used. Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Kobject: convert net/bridge/br_if.c to use kobject_init/add_ng()Greg Kroah-Hartman2008-01-241-7/+3
| | | | | | | | | This converts the code to use the new kobject functions, cleaning up the logic in doing so. Cc: Stephen Hemminger <shemminger@linux-foundation.org> Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Kobject: convert mm/slub.c to use kobject_init/add_ng()Greg Kroah-Hartman2008-01-241-5/+4
| | | | | | | | | This converts the code to use the new kobject functions, cleaning up the logic in doing so. Cc: Christoph Lameter <clameter@sgi.com> Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Kobject: convert kernel/user.c to use kobject_init/add_ng()Greg Kroah-Hartman2008-01-241-5/+4
| | | | | | | | This converts the code to use the new kobject functions, cleaning up the logic in doing so. Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Kobject: convert kernel/params.c to use kobject_init/add_ng()Greg Kroah-Hartman2008-01-241-4/+2
| | | | | | | | This converts the code to use the new kobject functions, cleaning up the logic in doing so. Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Kobject: convert fs/char_dev.c to use kobject_init/add_ng()Greg Kroah-Hartman2008-01-241-4/+2
| | | | | | | | This converts the code to use the new kobject functions, cleaning up the logic in doing so. Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Kobject: convert drivers/net/iseries_veth.c to use kobject_init/add_ng()Greg Kroah-Hartman2008-01-241-13/+6
| | | | | | | | | | This converts the code to use the new kobject functions, cleaning up the logic in doing so. Cc: Kyle A. Lucke <klucke@us.ibm.com> Cc: David Gibson <dwg@au1.ibm.com> Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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