[PATCH] can: rcar_canfd: add __maybe_unused annotation to silence warning

[PATCH] can: rcar_canfd: add __maybe_unused annotation to silence warning

[Marc Kleine-Budde]

Since commit

| dd3bd23eb438 ("can: rcar_canfd: Add Renesas R-Car CAN FD driver")

the rcar_canfd driver can be compile tested on all architectures. On
non OF enabled archs, or archs where OF is optional (and disabled in
the .config) the compilation throws the following warning:

| drivers/net/can/rcar/rcar_canfd.c:2020:34: warning: unused variable 'rcar_canfd_of_table' [-Wunused-const-variable]
| static const struct of_device_id rcar_canfd_of_table[] = {
|                                  ^

This patch fixes the warning by marking the variable
rcar_canfd_of_table as __maybe_unused.

Fixes: ac4224087312 ("can: rcar: Kconfig: Add helper dependency on COMPILE_TEST")
Fixes: dd3bd23eb438 ("can: rcar_canfd: Add Renesas R-Car CAN FD driver")
Cc: Cai Huoqing <caihuoqing@baidu.com>
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
---
 drivers/net/can/rcar/rcar_canfd.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/can/rcar/rcar_canfd.c b/drivers/net/can/rcar/rcar_canfd.c
index c47988d3674e..c05a7f60c0a8 100644
--- a/drivers/net/can/rcar/rcar_canfd.c
+++ b/drivers/net/can/rcar/rcar_canfd.c
@@ -2017,7 +2017,7 @@ static int __maybe_unused rcar_canfd_resume(struct device *dev)
 static SIMPLE_DEV_PM_OPS(rcar_canfd_pm_ops, rcar_canfd_suspend,
 			 rcar_canfd_resume);
 
-static const struct of_device_id rcar_canfd_of_table[] = {
+static const struct of_device_id rcar_canfd_of_table[] __maybe_unused = {
 	{ .compatible = "renesas,rcar-gen3-canfd", .data = (void *)RENESAS_RCAR_GEN3 },
 	{ .compatible = "renesas,rzg2l-canfd", .data = (void *)RENESAS_RZG2L },
 	{ }
-- 
2.33.0

Re: [PATCH] can: rcar_canfd: add __maybe_unused annotation to silence warning

[Cai Huoqing]

+Cc: linux-renesas-soc@vger.kernel.org
On 04 Sep 21 15:07:01, Marc Kleine-Budde wrote:
> Since commit
> 
> | dd3bd23eb438 ("can: rcar_canfd: Add Renesas R-Car CAN FD driver")
> 
> the rcar_canfd driver can be compile tested on all architectures. On
> non OF enabled archs, or archs where OF is optional (and disabled in
> the .config) the compilation throws the following warning:
> 
> | drivers/net/can/rcar/rcar_canfd.c:2020:34: warning: unused variable 'rcar_canfd_of_table' [-Wunused-const-variable]
> | static const struct of_device_id rcar_canfd_of_table[] = {
> |                                  ^
> 
> This patch fixes the warning by marking the variable
> rcar_canfd_of_table as __maybe_unused.
> 
> Fixes: ac4224087312 ("can: rcar: Kconfig: Add helper dependency on COMPILE_TEST")
> Fixes: dd3bd23eb438 ("can: rcar_canfd: Add Renesas R-Car CAN FD driver")
> Cc: Cai Huoqing <caihuoqing@baidu.com>
> Reported-by: kernel test robot <lkp@intel.com>
> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
> ---
>  drivers/net/can/rcar/rcar_canfd.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/can/rcar/rcar_canfd.c b/drivers/net/can/rcar/rcar_canfd.c
> index c47988d3674e..c05a7f60c0a8 100644
> --- a/drivers/net/can/rcar/rcar_canfd.c
> +++ b/drivers/net/can/rcar/rcar_canfd.c
> @@ -2017,7 +2017,7 @@ static int __maybe_unused rcar_canfd_resume(struct device *dev)
>  static SIMPLE_DEV_PM_OPS(rcar_canfd_pm_ops, rcar_canfd_suspend,
>  			 rcar_canfd_resume);
>  
> -static const struct of_device_id rcar_canfd_of_table[] = {
> +static const struct of_device_id rcar_canfd_of_table[] __maybe_unused = {
>  	{ .compatible = "renesas,rcar-gen3-canfd", .data = (void *)RENESAS_RCAR_GEN3 },
>  	{ .compatible = "renesas,rzg2l-canfd", .data = (void *)RENESAS_RZG2L },
>  	{ }
> -- 
> 2.33.0
> 
>