linux-kernel - Re: [PATCH] selftests/gpio: Fix gpio compiling error

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Date:   Thu, 2 Sep 2021 15:08:06 -0600
From:   Shuah Khan <skhan@...uxfoundation.org>
To:     Li Zhijian <lizhijian@...fujitsu.com>, bamv2005@...il.com,
        shuah@...nel.org, linux-gpio@...r.kernel.org,
        linux-kselftest@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, Philip Li <philip.li@...el.com>,
        kernel test robot <lkp@...el.com>,
        Shuah Khan <skhan@...uxfoundation.org>
Subject: Re: [PATCH] selftests/gpio: Fix gpio compiling error

On 9/2/21 2:46 AM, Li Zhijian wrote:

I like to see the reason for this compile error followed by how
it is fixed.

> [root@...s-rpma gpio]# make
> gcc     gpio-mockup-cdev.c  -o /home/lizhijian/linux/tools/testing/selftests/gpio/gpio-mockup-cdev
> gpio-mockup-cdev.c: In function ‘request_line_v2’:
> gpio-mockup-cdev.c:24:30: error: storage size of ‘req’ isn’t known
>     24 |  struct gpio_v2_line_request req;
>        |                              ^~~
> gpio-mockup-cdev.c:32:14: error: ‘GPIO_V2_LINE_FLAG_OUTPUT’ undeclared (first use in this function); did you mean ‘GPIOLINE_FLAG_IS_OUT’?
>     32 |  if (flags & GPIO_V2_LINE_FLAG_OUTPUT) {
>        |              ^~~~~~~~~~~~~~~~~~~~~~~~
> 
> Search headers from linux tree like others, such as sched


> 
> CC: Philip Li <philip.li@...el.com>
> Reported-by: kernel test robot <lkp@...el.com>
> Signed-off-by: Li Zhijian <lizhijian@...fujitsu.com>
> ---
>   tools/testing/selftests/gpio/Makefile | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/tools/testing/selftests/gpio/Makefile b/tools/testing/selftests/gpio/Makefile
> index 39f2bbe8dd3d..42ea7d2aa844 100644
> --- a/tools/testing/selftests/gpio/Makefile
> +++ b/tools/testing/selftests/gpio/Makefile
> @@ -3,5 +3,6 @@
>   TEST_PROGS := gpio-mockup.sh
>   TEST_FILES := gpio-mockup-sysfs.sh
>   TEST_GEN_PROGS_EXTENDED := gpio-mockup-cdev
> +CFLAGS += -I../../../../usr/include
>   
>   include ../lib.mk
> 

thanks,
-- Shuah