* [PATCH 1/6] usb: host: unhide suspend/resume declarations
2016-03-02 15:24 usb: avoid warnings for unused pm functions Arnd Bergmann
@ 2016-03-02 15:24 ` Arnd Bergmann
2016-03-02 15:58 ` Alan Stern
2016-03-02 15:24 ` [PATCH 2/6] usb: xhci-mtk: use __maybe_unused to hide pm functions Arnd Bergmann
` (4 subsequent siblings)
5 siblings, 1 reply; 12+ messages in thread
From: Arnd Bergmann @ 2016-03-02 15:24 UTC (permalink / raw)
To: linux-arm-kernel
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@arndb.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);
--
2.7.0
^ permalink raw reply related [flat|nested] 12+ messages in thread* [PATCH 1/6] usb: host: unhide suspend/resume declarations
2016-03-02 15:24 ` [PATCH 1/6] usb: host: unhide suspend/resume declarations Arnd Bergmann
@ 2016-03-02 15:58 ` Alan Stern
0 siblings, 0 replies; 12+ messages in thread
From: Alan Stern @ 2016-03-02 15:58 UTC (permalink / raw)
To: linux-arm-kernel
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@arndb.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@rowland.harvard.edu>
^ permalink raw reply [flat|nested] 12+ messages in thread
* [PATCH 2/6] usb: xhci-mtk: use __maybe_unused to hide pm functions
2016-03-02 15:24 usb: avoid warnings for unused pm functions Arnd Bergmann
2016-03-02 15:24 ` [PATCH 1/6] usb: host: unhide suspend/resume declarations Arnd Bergmann
@ 2016-03-02 15:24 ` Arnd Bergmann
2016-03-04 16:33 ` Matthias Brugger
2016-03-02 15:24 ` [PATCH 3/6] usb: ohci-at91: " Arnd Bergmann
` (3 subsequent siblings)
5 siblings, 1 reply; 12+ messages in thread
From: Arnd Bergmann @ 2016-03-02 15:24 UTC (permalink / raw)
To: linux-arm-kernel
The mediatek XHCI glue driver uses SET_SYSTEM_SLEEP_PM_OPS() to
conditionally set the correct suspend/resume options, and
also puts both the dev_pm_ops and the functions inside of
an #ifdef testing for CONFIG_PM_SLEEP, but those functions
then call other code that becomes unused:
drivers/usb/host/xhci-mtk.c:135:12: error: 'xhci_mtk_host_disable' defined but not used [-Werror=unused-function]
drivers/usb/host/xhci-mtk.c:313:13: error: 'usb_wakeup_enable' defined but not used [-Werror=unused-function]
drivers/usb/host/xhci-mtk.c:321:13: error: 'usb_wakeup_disable' defined but not used [-Werror=unused-function]
This replaces the #ifdef with __maybe_unused annotations so the
compiler knows it can silently drop them instead of warning.
For the DEV_PM_OPS definition, we can use an IS_ENABLED() check
to avoid defining the structure when CONFIG_PM is not set without
the #ifdef.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
drivers/usb/host/xhci-mtk.c | 10 +++-------
1 file changed, 3 insertions(+), 7 deletions(-)
diff --git a/drivers/usb/host/xhci-mtk.c b/drivers/usb/host/xhci-mtk.c
index 9532f5aef71b..79959f17c38c 100644
--- a/drivers/usb/host/xhci-mtk.c
+++ b/drivers/usb/host/xhci-mtk.c
@@ -695,7 +695,6 @@ static int xhci_mtk_remove(struct platform_device *dev)
return 0;
}
-#ifdef CONFIG_PM_SLEEP
/*
* if ip sleep fails, and all clocks are disabled, access register will hang
* AHB bus, so stop polling roothubs to avoid regs access on bus suspend.
@@ -703,7 +702,7 @@ static int xhci_mtk_remove(struct platform_device *dev)
* to wake up system immediately after system suspend complete if ip sleep
* fails, it is what we wanted.
*/
-static int xhci_mtk_suspend(struct device *dev)
+static int __maybe_unused xhci_mtk_suspend(struct device *dev)
{
struct xhci_hcd_mtk *mtk = dev_get_drvdata(dev);
struct usb_hcd *hcd = mtk->hcd;
@@ -722,7 +721,7 @@ static int xhci_mtk_suspend(struct device *dev)
return 0;
}
-static int xhci_mtk_resume(struct device *dev)
+static int __maybe_unused xhci_mtk_resume(struct device *dev)
{
struct xhci_hcd_mtk *mtk = dev_get_drvdata(dev);
struct usb_hcd *hcd = mtk->hcd;
@@ -744,10 +743,7 @@ static int xhci_mtk_resume(struct device *dev)
static const struct dev_pm_ops xhci_mtk_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(xhci_mtk_suspend, xhci_mtk_resume)
};
-#define DEV_PM_OPS (&xhci_mtk_pm_ops)
-#else
-#define DEV_PM_OPS NULL
-#endif /* CONFIG_PM */
+#define DEV_PM_OPS IS_ENABLED(CONFIG_PM) ? &xhci_mtk_pm_ops : NULL
#ifdef CONFIG_OF
static const struct of_device_id mtk_xhci_of_match[] = {
--
2.7.0
^ permalink raw reply related [flat|nested] 12+ messages in thread* [PATCH 2/6] usb: xhci-mtk: use __maybe_unused to hide pm functions
2016-03-02 15:24 ` [PATCH 2/6] usb: xhci-mtk: use __maybe_unused to hide pm functions Arnd Bergmann
@ 2016-03-04 16:33 ` Matthias Brugger
2016-03-10 11:42 ` Mathias Nyman
0 siblings, 1 reply; 12+ messages in thread
From: Matthias Brugger @ 2016-03-04 16:33 UTC (permalink / raw)
To: linux-arm-kernel
On 02/03/16 16:24, Arnd Bergmann wrote:
> The mediatek XHCI glue driver uses SET_SYSTEM_SLEEP_PM_OPS() to
> conditionally set the correct suspend/resume options, and
> also puts both the dev_pm_ops and the functions inside of
> an #ifdef testing for CONFIG_PM_SLEEP, but those functions
> then call other code that becomes unused:
>
> drivers/usb/host/xhci-mtk.c:135:12: error: 'xhci_mtk_host_disable' defined but not used [-Werror=unused-function]
> drivers/usb/host/xhci-mtk.c:313:13: error: 'usb_wakeup_enable' defined but not used [-Werror=unused-function]
> drivers/usb/host/xhci-mtk.c:321:13: error: 'usb_wakeup_disable' defined but not used [-Werror=unused-function]
>
> This replaces the #ifdef with __maybe_unused annotations so the
> compiler knows it can silently drop them instead of warning.
>
> For the DEV_PM_OPS definition, we can use an IS_ENABLED() check
> to avoid defining the structure when CONFIG_PM is not set without
> the #ifdef.
>
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> ---
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
> drivers/usb/host/xhci-mtk.c | 10 +++-------
> 1 file changed, 3 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/usb/host/xhci-mtk.c b/drivers/usb/host/xhci-mtk.c
> index 9532f5aef71b..79959f17c38c 100644
> --- a/drivers/usb/host/xhci-mtk.c
> +++ b/drivers/usb/host/xhci-mtk.c
> @@ -695,7 +695,6 @@ static int xhci_mtk_remove(struct platform_device *dev)
> return 0;
> }
>
> -#ifdef CONFIG_PM_SLEEP
> /*
> * if ip sleep fails, and all clocks are disabled, access register will hang
> * AHB bus, so stop polling roothubs to avoid regs access on bus suspend.
> @@ -703,7 +702,7 @@ static int xhci_mtk_remove(struct platform_device *dev)
> * to wake up system immediately after system suspend complete if ip sleep
> * fails, it is what we wanted.
> */
> -static int xhci_mtk_suspend(struct device *dev)
> +static int __maybe_unused xhci_mtk_suspend(struct device *dev)
> {
> struct xhci_hcd_mtk *mtk = dev_get_drvdata(dev);
> struct usb_hcd *hcd = mtk->hcd;
> @@ -722,7 +721,7 @@ static int xhci_mtk_suspend(struct device *dev)
> return 0;
> }
>
> -static int xhci_mtk_resume(struct device *dev)
> +static int __maybe_unused xhci_mtk_resume(struct device *dev)
> {
> struct xhci_hcd_mtk *mtk = dev_get_drvdata(dev);
> struct usb_hcd *hcd = mtk->hcd;
> @@ -744,10 +743,7 @@ static int xhci_mtk_resume(struct device *dev)
> static const struct dev_pm_ops xhci_mtk_pm_ops = {
> SET_SYSTEM_SLEEP_PM_OPS(xhci_mtk_suspend, xhci_mtk_resume)
> };
> -#define DEV_PM_OPS (&xhci_mtk_pm_ops)
> -#else
> -#define DEV_PM_OPS NULL
> -#endif /* CONFIG_PM */
> +#define DEV_PM_OPS IS_ENABLED(CONFIG_PM) ? &xhci_mtk_pm_ops : NULL
>
> #ifdef CONFIG_OF
> static const struct of_device_id mtk_xhci_of_match[] = {
>
^ permalink raw reply [flat|nested] 12+ messages in thread* [PATCH 2/6] usb: xhci-mtk: use __maybe_unused to hide pm functions
2016-03-04 16:33 ` Matthias Brugger
@ 2016-03-10 11:42 ` Mathias Nyman
0 siblings, 0 replies; 12+ messages in thread
From: Mathias Nyman @ 2016-03-10 11:42 UTC (permalink / raw)
To: linux-arm-kernel
On 04.03.2016 18:33, Matthias Brugger wrote:
>
>
> On 02/03/16 16:24, Arnd Bergmann wrote:
>> The mediatek XHCI glue driver uses SET_SYSTEM_SLEEP_PM_OPS() to
>> conditionally set the correct suspend/resume options, and
>> also puts both the dev_pm_ops and the functions inside of
>> an #ifdef testing for CONFIG_PM_SLEEP, but those functions
>> then call other code that becomes unused:
>>
>> drivers/usb/host/xhci-mtk.c:135:12: error: 'xhci_mtk_host_disable' defined but not used [-Werror=unused-function]
>> drivers/usb/host/xhci-mtk.c:313:13: error: 'usb_wakeup_enable' defined but not used [-Werror=unused-function]
>> drivers/usb/host/xhci-mtk.c:321:13: error: 'usb_wakeup_disable' defined but not used [-Werror=unused-function]
>>
>> This replaces the #ifdef with __maybe_unused annotations so the
>> compiler knows it can silently drop them instead of warning.
>>
>> For the DEV_PM_OPS definition, we can use an IS_ENABLED() check
>> to avoid defining the structure when CONFIG_PM is not set without
>> the #ifdef.
>>
>> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
>> ---
>
> Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
>
Acked-by: Mathias Nyman <mathias.nyman@linux.intel.com>
^ permalink raw reply [flat|nested] 12+ messages in thread
* [PATCH 3/6] usb: ohci-at91: use __maybe_unused to hide pm functions
2016-03-02 15:24 usb: avoid warnings for unused pm functions Arnd Bergmann
2016-03-02 15:24 ` [PATCH 1/6] usb: host: unhide suspend/resume declarations Arnd Bergmann
2016-03-02 15:24 ` [PATCH 2/6] usb: xhci-mtk: use __maybe_unused to hide pm functions Arnd Bergmann
@ 2016-03-02 15:24 ` Arnd Bergmann
2016-03-02 15:34 ` Nicolas Ferre
2016-03-02 15:24 ` [PATCH 4/6] usb: ehci-atmel: " Arnd Bergmann
` (2 subsequent siblings)
5 siblings, 1 reply; 12+ messages in thread
From: Arnd Bergmann @ 2016-03-02 15:24 UTC (permalink / raw)
To: linux-arm-kernel
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 <arnd@arndb.de>
---
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
^ permalink raw reply related [flat|nested] 12+ messages in thread* [PATCH 3/6] usb: ohci-at91: use __maybe_unused to hide pm functions
2016-03-02 15:24 ` [PATCH 3/6] usb: ohci-at91: " Arnd Bergmann
@ 2016-03-02 15:34 ` Nicolas Ferre
0 siblings, 0 replies; 12+ messages in thread
From: Nicolas Ferre @ 2016-03-02 15:34 UTC (permalink / raw)
To: linux-arm-kernel
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 <arnd@arndb.de>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
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
^ permalink raw reply [flat|nested] 12+ messages in thread
* [PATCH 4/6] usb: ehci-atmel: use __maybe_unused to hide pm functions
2016-03-02 15:24 usb: avoid warnings for unused pm functions Arnd Bergmann
` (2 preceding siblings ...)
2016-03-02 15:24 ` [PATCH 3/6] usb: ohci-at91: " Arnd Bergmann
@ 2016-03-02 15:24 ` Arnd Bergmann
2016-03-02 15:34 ` Nicolas Ferre
2016-03-02 15:24 ` [PATCH 5/6] phy: dm816x: " Arnd Bergmann
2016-03-02 15:24 ` [PATCH 6/6] phy: twl4030: " Arnd Bergmann
5 siblings, 1 reply; 12+ messages in thread
From: Arnd Bergmann @ 2016-03-02 15:24 UTC (permalink / raw)
To: linux-arm-kernel
The ehci-atmel 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/ehci-atmel.c:189:12: error: 'ehci_atmel_drv_suspend' defined but not used [-Werror=unused-function]
drivers/usb/host/ehci-atmel.c:203:12: error: 'ehci_atmel_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 <arnd@arndb.de>
---
drivers/usb/host/ehci-atmel.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/drivers/usb/host/ehci-atmel.c b/drivers/usb/host/ehci-atmel.c
index be0964a801e8..7440722bfbf0 100644
--- a/drivers/usb/host/ehci-atmel.c
+++ b/drivers/usb/host/ehci-atmel.c
@@ -185,8 +185,7 @@ static int ehci_atmel_drv_remove(struct platform_device *pdev)
return 0;
}
-#ifdef CONFIG_PM
-static int ehci_atmel_drv_suspend(struct device *dev)
+static int __maybe_unused ehci_atmel_drv_suspend(struct device *dev)
{
struct usb_hcd *hcd = dev_get_drvdata(dev);
struct atmel_ehci_priv *atmel_ehci = hcd_to_atmel_ehci_priv(hcd);
@@ -200,7 +199,7 @@ static int ehci_atmel_drv_suspend(struct device *dev)
return 0;
}
-static int ehci_atmel_drv_resume(struct device *dev)
+static int __maybe_unused ehci_atmel_drv_resume(struct device *dev)
{
struct usb_hcd *hcd = dev_get_drvdata(dev);
struct atmel_ehci_priv *atmel_ehci = hcd_to_atmel_ehci_priv(hcd);
@@ -208,7 +207,6 @@ static int ehci_atmel_drv_resume(struct device *dev)
atmel_start_clock(atmel_ehci);
return ehci_resume(hcd, false);
}
-#endif
#ifdef CONFIG_OF
static const struct of_device_id atmel_ehci_dt_ids[] = {
--
2.7.0
^ permalink raw reply related [flat|nested] 12+ messages in thread* [PATCH 4/6] usb: ehci-atmel: use __maybe_unused to hide pm functions
2016-03-02 15:24 ` [PATCH 4/6] usb: ehci-atmel: " Arnd Bergmann
@ 2016-03-02 15:34 ` Nicolas Ferre
0 siblings, 0 replies; 12+ messages in thread
From: Nicolas Ferre @ 2016-03-02 15:34 UTC (permalink / raw)
To: linux-arm-kernel
Le 02/03/2016 16:24, Arnd Bergmann a ?crit :
> The ehci-atmel 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/ehci-atmel.c:189:12: error: 'ehci_atmel_drv_suspend' defined but not used [-Werror=unused-function]
> drivers/usb/host/ehci-atmel.c:203:12: error: 'ehci_atmel_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 <arnd@arndb.de>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
> ---
> drivers/usb/host/ehci-atmel.c | 6 ++----
> 1 file changed, 2 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/usb/host/ehci-atmel.c b/drivers/usb/host/ehci-atmel.c
> index be0964a801e8..7440722bfbf0 100644
> --- a/drivers/usb/host/ehci-atmel.c
> +++ b/drivers/usb/host/ehci-atmel.c
> @@ -185,8 +185,7 @@ static int ehci_atmel_drv_remove(struct platform_device *pdev)
> return 0;
> }
>
> -#ifdef CONFIG_PM
> -static int ehci_atmel_drv_suspend(struct device *dev)
> +static int __maybe_unused ehci_atmel_drv_suspend(struct device *dev)
> {
> struct usb_hcd *hcd = dev_get_drvdata(dev);
> struct atmel_ehci_priv *atmel_ehci = hcd_to_atmel_ehci_priv(hcd);
> @@ -200,7 +199,7 @@ static int ehci_atmel_drv_suspend(struct device *dev)
> return 0;
> }
>
> -static int ehci_atmel_drv_resume(struct device *dev)
> +static int __maybe_unused ehci_atmel_drv_resume(struct device *dev)
> {
> struct usb_hcd *hcd = dev_get_drvdata(dev);
> struct atmel_ehci_priv *atmel_ehci = hcd_to_atmel_ehci_priv(hcd);
> @@ -208,7 +207,6 @@ static int ehci_atmel_drv_resume(struct device *dev)
> atmel_start_clock(atmel_ehci);
> return ehci_resume(hcd, false);
> }
> -#endif
>
> #ifdef CONFIG_OF
> static const struct of_device_id atmel_ehci_dt_ids[] = {
>
--
Nicolas Ferre
^ permalink raw reply [flat|nested] 12+ messages in thread
* [PATCH 5/6] phy: dm816x: use __maybe_unused to hide pm functions
2016-03-02 15:24 usb: avoid warnings for unused pm functions Arnd Bergmann
` (3 preceding siblings ...)
2016-03-02 15:24 ` [PATCH 4/6] usb: ehci-atmel: " Arnd Bergmann
@ 2016-03-02 15:24 ` Arnd Bergmann
2016-03-02 15:24 ` [PATCH 6/6] phy: twl4030: " Arnd Bergmann
5 siblings, 0 replies; 12+ messages in thread
From: Arnd Bergmann @ 2016-03-02 15:24 UTC (permalink / raw)
To: linux-arm-kernel
The dm816x USB PHY driver uses UNIVERSAL_DEV_PM_OPS to access
its suspend/resume functions, which causes a warning about
unused symbols when CONFIG_PM is disabled:
drivers/phy/phy-dm816x-usb.c:121:12: error: 'dm816x_usb_phy_runtime_suspend' defined but not used [-Werror=unused-function]
drivers/phy/phy-dm816x-usb.c:139:12: error: 'dm816x_usb_phy_runtime_resume' defined but not used [-Werror=unused-function]
This adds __maybe_unused annotations to let the compiler know
it can silently drop the function definition.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
drivers/phy/phy-dm816x-usb.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/phy/phy-dm816x-usb.c b/drivers/phy/phy-dm816x-usb.c
index b4bbef664d20..cbcce7cf0028 100644
--- a/drivers/phy/phy-dm816x-usb.c
+++ b/drivers/phy/phy-dm816x-usb.c
@@ -118,7 +118,7 @@ static const struct phy_ops ops = {
.owner = THIS_MODULE,
};
-static int dm816x_usb_phy_runtime_suspend(struct device *dev)
+static int __maybe_unused dm816x_usb_phy_runtime_suspend(struct device *dev)
{
struct dm816x_usb_phy *phy = dev_get_drvdata(dev);
unsigned int mask, val;
@@ -136,7 +136,7 @@ static int dm816x_usb_phy_runtime_suspend(struct device *dev)
return 0;
}
-static int dm816x_usb_phy_runtime_resume(struct device *dev)
+static int __maybe_unused dm816x_usb_phy_runtime_resume(struct device *dev)
{
struct dm816x_usb_phy *phy = dev_get_drvdata(dev);
unsigned int mask, val;
--
2.7.0
^ permalink raw reply related [flat|nested] 12+ messages in thread* [PATCH 6/6] phy: twl4030: use __maybe_unused to hide pm functions
2016-03-02 15:24 usb: avoid warnings for unused pm functions Arnd Bergmann
` (4 preceding siblings ...)
2016-03-02 15:24 ` [PATCH 5/6] phy: dm816x: " Arnd Bergmann
@ 2016-03-02 15:24 ` Arnd Bergmann
5 siblings, 0 replies; 12+ messages in thread
From: Arnd Bergmann @ 2016-03-02 15:24 UTC (permalink / raw)
To: linux-arm-kernel
The twl4030 USB PHY driver uses UNIVERSAL_DEV_PM_OPS to access
its suspend/resume functions, which causes a warning about
unused symbols when CONFIG_PM is disabled:
drivers/phy/phy-twl4030-usb.c:394:12: error: 'twl4030_usb_runtime_suspend' defined but not used [-Werror=unused-function]
drivers/phy/phy-twl4030-usb.c:408:12: error: 'twl4030_usb_runtime_resume' defined but not used [-Werror=unused-function]
This adds __maybe_unused annotations to let the compiler know
it can silently drop the function definition.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
drivers/phy/phy-twl4030-usb.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/phy/phy-twl4030-usb.c b/drivers/phy/phy-twl4030-usb.c
index 840f3eae428b..6b6af6cba454 100644
--- a/drivers/phy/phy-twl4030-usb.c
+++ b/drivers/phy/phy-twl4030-usb.c
@@ -391,7 +391,7 @@ static void __twl4030_phy_power(struct twl4030_usb *twl, int on)
WARN_ON(twl4030_usb_write_verify(twl, PHY_PWR_CTRL, pwr) < 0);
}
-static int twl4030_usb_runtime_suspend(struct device *dev)
+static int __maybe_unused twl4030_usb_runtime_suspend(struct device *dev)
{
struct twl4030_usb *twl = dev_get_drvdata(dev);
@@ -405,7 +405,7 @@ static int twl4030_usb_runtime_suspend(struct device *dev)
return 0;
}
-static int twl4030_usb_runtime_resume(struct device *dev)
+static int __maybe_unused twl4030_usb_runtime_resume(struct device *dev)
{
struct twl4030_usb *twl = dev_get_drvdata(dev);
int res;
--
2.7.0
^ permalink raw reply related [flat|nested] 12+ messages in thread