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usb: core: phy: add missing forward declaration for "struct device"

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Currently hcd.c is the only consumer of the usb_phy_roothub logic. This
already includes the required header files so struct device is known.
However, future consumers might not know about struct device.
Add a forward declaration for struct device to fix potential future
consumers which don't include any of the struct device API headers.

Fixes: 07dbff0ddbd86c ("usb: core: add a wrapper for the USB PHYs on the HCD")
Suggested-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Martin Blumenstingl 2018-04-18 21:39:50 +02:00 committed by Greg Kroah-Hartman
parent fec94445db
commit 9d3cd19be3
1 changed files with 1 additions and 0 deletions
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drivers/usb/core/phy.h
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@ -1,3 +1,4 @@
struct device;
struct usb_phy_roothub;
struct usb_phy_roothub *usb_phy_roothub_alloc(struct device *dev);