linux-kernel - Re: [PATCH 1/6] usb: host: unhide suspend/resume declarations

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Date:	Wed, 2 Mar 2016 10:58:09 -0500 (EST)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Arnd Bergmann <arnd@...db.de>
cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	Felipe Balbi <balbi@...nel.org>, <linux-usb@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/6] usb: host: unhide suspend/resume declarations

On Wed, 2 Mar 2016, Arnd Bergmann wrote:

> There is no need to hide function declarations, and making
> these visible to the SoC specific host drivers lets us
> use __maybe_unused and IS_ENABLED() checks to control
> their use, rather than having to use #ifdef to hide all
> callers.
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---
>  drivers/usb/host/ehci.h | 2 --
>  drivers/usb/host/ohci.h | 2 --
>  2 files changed, 4 deletions(-)
> 
> diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h
> index 2ddf35203c05..3f3b74aeca97 100644
> --- a/drivers/usb/host/ehci.h
> +++ b/drivers/usb/host/ehci.h
> @@ -888,12 +888,10 @@ extern int	ehci_handshake(struct ehci_hcd *ehci, void __iomem *ptr,
>  				u32 mask, u32 done, int usec);
>  extern int	ehci_reset(struct ehci_hcd *ehci);
>  
> -#ifdef CONFIG_PM
>  extern int	ehci_suspend(struct usb_hcd *hcd, bool do_wakeup);
>  extern int	ehci_resume(struct usb_hcd *hcd, bool force_reset);
>  extern void	ehci_adjust_port_wakeup_flags(struct ehci_hcd *ehci,
>  			bool suspending, bool do_wakeup);
> -#endif	/* CONFIG_PM */
>  
>  extern int	ehci_hub_control(struct usb_hcd	*hcd, u16 typeReq, u16 wValue,
>  				 u16 wIndex, char *buf, u16 wLength);
> diff --git a/drivers/usb/host/ohci.h b/drivers/usb/host/ohci.h
> index bc462288cfb0..37f1725e7a46 100644
> --- a/drivers/usb/host/ohci.h
> +++ b/drivers/usb/host/ohci.h
> @@ -735,10 +735,8 @@ extern void	ohci_init_driver(struct hc_driver *drv,
>  				const struct ohci_driver_overrides *over);
>  extern int	ohci_restart(struct ohci_hcd *ohci);
>  extern int	ohci_setup(struct usb_hcd *hcd);
> -#ifdef CONFIG_PM
>  extern int	ohci_suspend(struct usb_hcd *hcd, bool do_wakeup);
>  extern int	ohci_resume(struct usb_hcd *hcd, bool hibernated);
> -#endif
>  extern int	ohci_hub_control(struct usb_hcd	*hcd, u16 typeReq, u16 wValue,
>  				 u16 wIndex, char *buf, u16 wLength);
>  extern int	ohci_hub_status_data(struct usb_hcd *hcd, char *buf);

Acked-by: Alan Stern <stern@...land.harvard.edu>