Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH v2 3/4] usb.h: take advantage of container_of_const() | Date | Mon, 5 Dec 2022 13:12:05 +0100 |
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Instead of rolling our own const-checking logic in to_usb_interface() and to_usb_device() use the newly added container_of_const() instead, making the logic much simpler overall.
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- v2: - respin with changed container_of_const() parameters
include/linux/usb.h | 42 ++---------------------------------------- 1 file changed, 2 insertions(+), 40 deletions(-)
diff --git a/include/linux/usb.h b/include/linux/usb.h index 4b463a5e4ba2..010c681b8822 100644 --- a/include/linux/usb.h +++ b/include/linux/usb.h @@ -259,26 +259,7 @@ struct usb_interface { struct work_struct reset_ws; /* for resets in atomic context */ }; -static inline struct usb_interface *__to_usb_interface(struct device *d) -{ - return container_of(d, struct usb_interface, dev); -} - -static inline const struct usb_interface *__to_usb_interface_const(const struct device *d) -{ - return container_of(d, struct usb_interface, dev); -} - -/* - * container_of() will happily take a const * and spit back a non-const * as it - * is just doing pointer math. But we want to be a bit more careful in the USB - * driver code, so manually force any const * of a device to also be a const * - * to a usb_device. - */ -#define to_usb_interface(dev) \ - _Generic((dev), \ - const struct device *: __to_usb_interface_const, \ - struct device *: __to_usb_interface)(dev) +#define to_usb_interface(__dev) container_of_const(__dev, struct usb_interface, dev) static inline void *usb_get_intfdata(struct usb_interface *intf) { @@ -730,26 +711,7 @@ struct usb_device { unsigned use_generic_driver:1; }; -static inline struct usb_device *__to_usb_device(struct device *d) -{ - return container_of(d, struct usb_device, dev); -} - -static inline const struct usb_device *__to_usb_device_const(const struct device *d) -{ - return container_of(d, struct usb_device, dev); -} - -/* - * container_of() will happily take a const * and spit back a non-const * as it - * is just doing pointer math. But we want to be a bit more careful in the USB - * driver code, so manually force any const * of a device to also be a const * - * to a usb_device. - */ -#define to_usb_device(dev) \ - _Generic((dev), \ - const struct device *: __to_usb_device_const, \ - struct device *: __to_usb_device)(dev) +#define to_usb_device(__dev) container_of_const(__dev, struct usb_device, dev) static inline struct usb_device *__intf_to_usbdev(struct usb_interface *intf) { -- 2.38.1
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