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driver core: bus: clean up bus_sort_breadthfirst() 

Convert the bus_sort_breadthfirst() function to use bus_to_subsys() and
not use the back-pointer to the private structure.

This also allows us to get rid of bus_get_device_klist() which was only
being used by this one internal function.

Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Link: https://lore.kernel.org/r/20230208111330.439504-14-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Greg Kroah-Hartman 2023-02-08 12:13:22 +01:00
parent 83b9148df2
commit b5aaecb82a
1 changed files with 5 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
drivers/base/bus.c
View File

@ -1006,11 +1006,6 @@ struct kset *bus_get_kset(struct bus_type *bus)
}
EXPORT_SYMBOL_GPL(bus_get_kset);
static struct klist *bus_get_device_klist(struct bus_type *bus)
{
return &bus->p->klist_devices;
}
/*
* Yes, this forcibly breaks the klist abstraction temporarily. It
* just wants to sort the klist, not change reference counts and
@ -1042,13 +1037,16 @@ void bus_sort_breadthfirst(struct bus_type *bus,
int (*compare)(const struct device *a,
const struct device *b))
{
struct subsys_private *sp = bus_to_subsys(bus);
LIST_HEAD(sorted_devices);
struct klist_node *n, *tmp;
struct device_private *dev_prv;
struct device *dev;
struct klist *device_klist;
device_klist = bus_get_device_klist(bus);
if (!sp)
return;
device_klist = &sp->klist_devices;
spin_lock(&device_klist->k_lock);
list_for_each_entry_safe(n, tmp, &device_klist->k_list, n_node) {
@ -1058,6 +1056,7 @@ void bus_sort_breadthfirst(struct bus_type *bus,
}
list_splice(&sorted_devices, &device_klist->k_list);
spin_unlock(&device_klist->k_lock);
subsys_put(sp);
}
EXPORT_SYMBOL_GPL(bus_sort_breadthfirst);