linux-kernel - Re: [PATCH v2] selftests/gpio: Fix gpio compiling error

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Message-ID: <72e833c4-1d33-c4a5-fb11-c029d5857515@fujitsu.com>
Date:   Wed, 29 Sep 2021 04:17:30 +0000
From:   "lizhijian@...itsu.com" <lizhijian@...itsu.com>
To:     "shuah@...nel.org" <shuah@...nel.org>,
        "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
        "linux-kselftest@...r.kernel.org" <linux-kselftest@...r.kernel.org>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Philip Li <philip.li@...el.com>,
        kernel test robot <lkp@...el.com>,
        "lizhijian@...itsu.com" <lizhijian@...itsu.com>
Subject: Re: [PATCH v2] selftests/gpio: Fix gpio compiling error

ping


On 03/09/2021 09:22, Li Zhijian wrote:
> [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) {
>        |              ^~~~~~~~~~~~~~~~~~~~~~~~
>
> gpio-mockup-cdev.c includes <linux/gpio.h> which could be provided by
> kernel-headers package, and where it's expected to declare
> GPIO_V2_LINE_FLAG_OUTPUT. However distros or developers will not always
> install the same kernel-header as we are compiling.
>
> So we can tell compiler to search headers from linux tree simply 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>
>
> ---
> V2: add more details about the fix
> ---
>   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