linux-kernel - Re: [PATCH 4/7] drivers: usb: Include appropriate header file in pci-quirks.c

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Date:	Thu, 19 Dec 2013 10:51:50 -0500 (EST)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Rashika Kheria <rashika.kheria@...il.com>
cc:	linux-kernel@...r.kernel.org,
	Sarah Sharp <sarah.a.sharp@...ux.intel.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	<linux-usb@...r.kernel.org>, <josh@...htriplett.org>
Subject: Re: [PATCH 4/7] drivers: usb: Include appropriate header file in
 pci-quirks.c

On Thu, 19 Dec 2013, Rashika Kheria wrote:

> Include header file include/linux/usb/hcd.h in host/pci-quirks.c because
> function usb_hcd_amd_remote_wakeup_quirk() has its prototype declaration
> in include/linux/usb/hcd.h.
> 
> This eliminates the following warning in host/pci-quirks.c:
> drivers/usb/host/pci-quirks.c:253:5: warning: no previous prototype for ‘usb_hcd_amd_remote_wakeup_quirk’ [-Wmissing-prototypes]

Since when does the compiler complain about functions with no 
prototype?

In any case, I think it would make more sense to move the prototype 
declaration into drivers/usb/host/pci-quirks.h, and have 
drivers/usb/core/hcd-pci.c include that file.  After all, it's 
perfectly reasonable for hcd-pci to want to know about the quirks of 
various PCI-based controllers, but it's not reasonable for pci-quirks.c 
to need to know about the details of HCDs.

Alan Stern

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