diff options
| author | Alan Stern <stern@rowland.harvard.edu> | 2006-09-19 00:24:28 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2006-09-26 08:08:40 +0400 |
| commit | 81107bf531d2524afbcd61f3b4ad57a71295d591 (patch) | |
| tree | 8c4f985714432bee996720c2d8e4bcfbe3d70575 /drivers/base/bus.c | |
| parent | f2eaae197f4590c4d96f31b09b0ee9067421a95c (diff) | |
| download | linux-81107bf531d2524afbcd61f3b4ad57a71295d591.tar.xz | |
Driver core: Remove unneeded routines from driver core
This patch (as783) simplifies the driver core slightly by removing four
unnecessary _get and _put methods.
It is vital that when a driver is removed from its bus's klist of
registered drivers, or when a device is removed from a driver's klist
of bound devices, that the klist updates complete synchronously.
Otherwise the kernel might try binding an unregistered driver to a
newly-registered device, or adding a device to the klist for a new
driver before it has been removed from the old driver's klist.
Since the removals must be synchronous, they don't need to update any
reference counts. Hence the _get and _put methods can be dispensed
with.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/base/bus.c')
| -rw-r--r-- | drivers/base/bus.c | 18 |
1 files changed, 1 insertions, 17 deletions
diff --git a/drivers/base/bus.c b/drivers/base/bus.c index 636af538a2b5..12173d16bea7 100644 --- a/drivers/base/bus.c +++ b/drivers/base/bus.c @@ -696,22 +696,6 @@ static void klist_devices_put(struct klist_node *n) put_device(dev); } -static void klist_drivers_get(struct klist_node *n) -{ - struct device_driver *drv = container_of(n, struct device_driver, - knode_bus); - - get_driver(drv); -} - -static void klist_drivers_put(struct klist_node *n) -{ - struct device_driver *drv = container_of(n, struct device_driver, - knode_bus); - - put_driver(drv); -} - /** * bus_register - register a bus with the system. * @bus: bus. @@ -747,7 +731,7 @@ int bus_register(struct bus_type * bus) goto bus_drivers_fail; klist_init(&bus->klist_devices, klist_devices_get, klist_devices_put); - klist_init(&bus->klist_drivers, klist_drivers_get, klist_drivers_put); + klist_init(&bus->klist_drivers, NULL, NULL); bus_add_attrs(bus); pr_debug("bus type '%s' registered\n", bus->name); |