With CONFIG_GPIOLIB=n, the 'struct gpio_chip' is not declared, so the following pops up on PowerPC:
cc1: warnings being treated as errors In file included from arch/powerpc/platforms/52xx/mpc52xx_common.c:19: include/linux/of_gpio.h:74: warning: 'struct gpio_chip' declared inside parameter list include/linux/of_gpio.h:74: warning: its scope is only this definition or declaration, which is probably not what you want include/linux/of_gpio.h:75: warning: 'struct gpio_chip' declared inside parameter list make[2]: *** [arch/powerpc/platforms/52xx/mpc52xx_common.o] Error 1 This patch fixes the issue by providing the proper forward declaration. Signed-off-by: Anton Vorontsov <cbouatmai...@gmail.com> --- On Tue, Aug 24, 2010 at 04:26:08PM +1000, Benjamin Herrenschmidt wrote: > I get that with my current stuff: > > cc1: warnings being treated as errors > In file included from [..]/mpc52xx_common.c:19: > of_gpio.h:74: error: ‘struct gpio_chip’ declared inside parameter list [...] > make[3]: *** Waiting for unfinished jobs.... That's because with GPIOCHIP=n no one declares struct gpio_chip. It should be either of_gpio.h or gpio.h. Let's make it gpio.h, as this feels more generic, and we already have some !GPIOLIB handling in there. include/linux/gpio.h | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-) diff --git a/include/linux/gpio.h b/include/linux/gpio.h index 03f616b..85207d2 100644 --- a/include/linux/gpio.h +++ b/include/linux/gpio.h @@ -15,6 +15,12 @@ struct device; /* + * Some code might rely on the declaration. Still, it is illegal + * to dereference it for !GPIOLIB case. + */ +struct gpio_chip; + +/* * Some platforms don't support the GPIO programming interface. * * In case some driver uses it anyway (it should normally have -- 1.7.0.5 _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev