Re: [PATCH v1] ARM:sunxi:sid: Make use of the of_match_ptr

From: Arnd Bergmann
Date: Wed Jan 07 2015 - 04:01:22 EST


On Wednesday 07 January 2015 08:41:08 Olliver Schinagl wrote:
> From: Olliver Schinagl <oliver@xxxxxxxxxxx>
>
> I probably have forgotten to use this macro for the of_match pointer, so
> this patch adds the of_match_ptr macro.
>
> Signed-off-by: Olliver Schinagl <oliver@xxxxxxxxxxx>
> ---
> drivers/misc/eeprom/sunxi_sid.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/misc/eeprom/sunxi_sid.c b/drivers/misc/eeprom/sunxi_sid.c
> index 8385177..5a330d9 100644
> --- a/drivers/misc/eeprom/sunxi_sid.c
> +++ b/drivers/misc/eeprom/sunxi_sid.c
> @@ -25,6 +25,7 @@
> #include <linux/kernel.h>
> #include <linux/kobject.h>
> #include <linux/module.h>
> +#include <linux/of.h>
> #include <linux/of_device.h>
> #include <linux/platform_device.h>
> #include <linux/random.h>
> @@ -146,7 +147,7 @@ static struct platform_driver sunxi_sid_driver = {
> .remove = sunxi_sid_remove,
> .driver = {
> .name = DRV_NAME,
> - .of_match_table = sunxi_sid_of_match,
> + .of_match_table = of_match_ptr(sunxi_sid_of_match),
> },
> };
> module_platform_driver(sunxi_sid_driver);

This looks wrong: sunxi_sid_of_match is defined unconditionally, so
now you get a compiler warning if CONFIG_OF is disabled.

The existing code is good, we only add the of_match_ptr() for drivers
that are useful without CONFIG_OF and that want to save a few bytes
in .data size.

Arnd
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