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usb: core: switch bus numbering to using idr

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USB bus numbering is based on directly dealing with bitmaps and
defines a separate list of busses.
This can be simplified and unified by using existing idr functionality.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Heiner Kallweit 2016-01-25 20:30:30 +01:00 • committed by Greg Kroah-Hartman
parent d785404198
commit 5363de7530
7 changed files with 15 additions and 35 deletions
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1
include/linux/usb.h
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@ -375,7 +375,6 @@ struct usb_bus {
struct usb_devmap devmap; /* device address allocation map */
struct usb_device *root_hub; /* Root hub */
struct usb_bus *hs_companion; /* Companion EHCI bus, if any */
struct list_head bus_list; /* list of busses */
struct mutex usb_address0_mutex; /* unaddressed device mutex */