2016-03-02 15:25:26

by Arnd Bergmann

Subject: [PATCH 3/6] usb: ohci-at91: use __maybe_unused to hide pm functions

The ohci-at91 driver uses #ifdef to check for CONFIG_PM, but then
uses SIMPLE_DEV_PM_OPS, which leaves the references out when
CONFIG_PM_SLEEP is not defined, so we get a warning with
PM=y && PM_SLEEP=n:

drivers/usb/host/ohci-at91.c:587:1: error: 'ohci_hcd_at91_drv_suspend' defined but not used [-Werror=unused-function]
drivers/usb/host/ohci-at91.c:631:12: error: 'ohci_hcd_at91_drv_resume' defined but not used [-Werror=unused-function]

This removes the incorrect #ifdef and instead uses a __maybe_unused
annotation to let the compiler know it can silently drop
the function definition.

Signed-off-by: Arnd Bergmann <[email protected]>
---
drivers/usb/host/ohci-at91.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/usb/host/ohci-at91.c b/drivers/usb/host/ohci-at91.c
index 95c8ddde0725..d177372bb357 100644
--- a/drivers/usb/host/ohci-at91.c
+++ b/drivers/usb/host/ohci-at91.c
@@ -581,9 +581,7 @@ static int ohci_hcd_at91_drv_remove(struct platform_device *pdev)
return 0;
}

-#ifdef CONFIG_PM
-
-static int
+static int __maybe_unused
ohci_hcd_at91_drv_suspend(struct device *dev)
{
struct usb_hcd *hcd = dev_get_drvdata(dev);
@@ -628,7 +626,8 @@ ohci_hcd_at91_drv_suspend(struct device *dev)
return ret;
}

-static int ohci_hcd_at91_drv_resume(struct device *dev)
+static int __maybe_unused
+ohci_hcd_at91_drv_resume(struct device *dev)
{
struct usb_hcd *hcd = dev_get_drvdata(dev);
struct ohci_at91_priv *ohci_at91 = hcd_to_ohci_at91_priv(hcd);
@@ -641,7 +640,6 @@ static int ohci_hcd_at91_drv_resume(struct device *dev)
ohci_resume(hcd, false);
return 0;
}
-#endif

static SIMPLE_DEV_PM_OPS(ohci_hcd_at91_pm_ops, ohci_hcd_at91_drv_suspend,
ohci_hcd_at91_drv_resume);
--
2.7.0

2016-03-02 15:34:06

by Nicolas Ferre

Subject: Re: [PATCH 3/6] usb: ohci-at91: use __maybe_unused to hide pm functions

Le 02/03/2016 16:24, Arnd Bergmann a ?crit :
> The ohci-at91 driver uses #ifdef to check for CONFIG_PM, but then
> uses SIMPLE_DEV_PM_OPS, which leaves the references out when
> CONFIG_PM_SLEEP is not defined, so we get a warning with
> PM=y && PM_SLEEP=n:
>
> drivers/usb/host/ohci-at91.c:587:1: error: 'ohci_hcd_at91_drv_suspend' defined but not used [-Werror=unused-function]
> drivers/usb/host/ohci-at91.c:631:12: error: 'ohci_hcd_at91_drv_resume' defined but not used [-Werror=unused-function]
>
> This removes the incorrect #ifdef and instead uses a __maybe_unused
> annotation to let the compiler know it can silently drop
> the function definition.
>
> Signed-off-by: Arnd Bergmann <[email protected]>

Acked-by: Nicolas Ferre <[email protected]>

Thanks Arnd, bye.

> ---
> drivers/usb/host/ohci-at91.c | 8 +++-----
> 1 file changed, 3 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/usb/host/ohci-at91.c b/drivers/usb/host/ohci-at91.c
> index 95c8ddde0725..d177372bb357 100644
> --- a/drivers/usb/host/ohci-at91.c
> +++ b/drivers/usb/host/ohci-at91.c
> @@ -581,9 +581,7 @@ static int ohci_hcd_at91_drv_remove(struct platform_device *pdev)
> return 0;
> }
>
> -#ifdef CONFIG_PM
> -
> -static int
> +static int __maybe_unused
> ohci_hcd_at91_drv_suspend(struct device *dev)
> {
> struct usb_hcd *hcd = dev_get_drvdata(dev);
> @@ -628,7 +626,8 @@ ohci_hcd_at91_drv_suspend(struct device *dev)
> return ret;
> }
>
> -static int ohci_hcd_at91_drv_resume(struct device *dev)
> +static int __maybe_unused
> +ohci_hcd_at91_drv_resume(struct device *dev)
> {
> struct usb_hcd *hcd = dev_get_drvdata(dev);
> struct ohci_at91_priv *ohci_at91 = hcd_to_ohci_at91_priv(hcd);
> @@ -641,7 +640,6 @@ static int ohci_hcd_at91_drv_resume(struct device *dev)
> ohci_resume(hcd, false);
> return 0;
> }
> -#endif
>
> static SIMPLE_DEV_PM_OPS(ohci_hcd_at91_pm_ops, ohci_hcd_at91_drv_suspend,
> ohci_hcd_at91_drv_resume);
>


--
Nicolas Ferre