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    Subject[PATCH 071/196] kset: convert struct bus_device->devices to use kset_create
    Date
    Dynamically create the kset instead of declaring it statically.

    Having 3 static kobjects in one structure is not only foolish, but ripe
    for nasty race conditions if handled improperly. We also rename the
    field to catch any potential users of it (not that there should be
    outside of the driver core...)

    Cc: Kay Sievers <kay.sievers@vrfy.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
    ---
    drivers/base/bus.c | 19 ++++++++++---------
    include/linux/device.h | 2 +-
    2 files changed, 11 insertions(+), 10 deletions(-)

    diff --git a/drivers/base/bus.c b/drivers/base/bus.c
    index e3b1010..b23eeb2 100644
    --- a/drivers/base/bus.c
    +++ b/drivers/base/bus.c
    @@ -449,7 +449,7 @@ int bus_add_device(struct device * dev)
    error = device_add_attrs(bus, dev);
    if (error)
    goto out_put;
    - error = sysfs_create_link(&bus->devices.kobj,
    + error = sysfs_create_link(&bus->devices_kset->kobj,
    &dev->kobj, dev->bus_id);
    if (error)
    goto out_id;
    @@ -466,7 +466,7 @@ int bus_add_device(struct device * dev)
    out_deprecated:
    sysfs_remove_link(&dev->kobj, "subsystem");
    out_subsys:
    - sysfs_remove_link(&bus->devices.kobj, dev->bus_id);
    + sysfs_remove_link(&bus->devices_kset->kobj, dev->bus_id);
    out_id:
    device_remove_attrs(bus, dev);
    out_put:
    @@ -512,7 +512,7 @@ void bus_remove_device(struct device * dev)
    if (dev->bus) {
    sysfs_remove_link(&dev->kobj, "subsystem");
    remove_deprecated_bus_links(dev);
    - sysfs_remove_link(&dev->bus->devices.kobj, dev->bus_id);
    + sysfs_remove_link(&dev->bus->devices_kset->kobj, dev->bus_id);
    device_remove_attrs(dev->bus, dev);
    if (dev->is_registered) {
    dev->is_registered = 0;
    @@ -862,11 +862,12 @@ int bus_register(struct bus_type * bus)
    if (retval)
    goto bus_uevent_fail;

    - kobject_set_name(&bus->devices.kobj, "devices");
    - bus->devices.kobj.parent = &bus->subsys.kobj;
    - retval = kset_register(&bus->devices);
    - if (retval)
    + bus->devices_kset = kset_create_and_add("devices", NULL,
    + &bus->subsys.kobj);
    + if (!bus->devices_kset) {
    + retval = -ENOMEM;
    goto bus_devices_fail;
    + }

    kobject_set_name(&bus->drivers.kobj, "drivers");
    bus->drivers.kobj.parent = &bus->subsys.kobj;
    @@ -894,7 +895,7 @@ bus_attrs_fail:
    bus_probe_files_fail:
    kset_unregister(&bus->drivers);
    bus_drivers_fail:
    - kset_unregister(&bus->devices);
    + kset_unregister(bus->devices_kset);
    bus_devices_fail:
    bus_remove_file(bus, &bus_attr_uevent);
    bus_uevent_fail:
    @@ -916,7 +917,7 @@ void bus_unregister(struct bus_type * bus)
    bus_remove_attrs(bus);
    remove_probe_files(bus);
    kset_unregister(&bus->drivers);
    - kset_unregister(&bus->devices);
    + kset_unregister(bus->devices_kset);
    bus_remove_file(bus, &bus_attr_uevent);
    subsystem_unregister(&bus->subsys);
    }
    diff --git a/include/linux/device.h b/include/linux/device.h
    index dbbbe89..82c2777 100644
    --- a/include/linux/device.h
    +++ b/include/linux/device.h
    @@ -55,7 +55,7 @@ struct bus_type {

    struct kset subsys;
    struct kset drivers;
    - struct kset devices;
    + struct kset *devices_kset;
    struct klist klist_devices;
    struct klist klist_drivers;

    --
    1.5.3.8


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