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Date:   Fri, 5 Jul 2019 14:56:00 +0200
From:   Bartosz Golaszewski <bgolaszewski@...libre.com>
To:     Yuehaibing <yuehaibing@...wei.com>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-gpio <linux-gpio@...r.kernel.org>,
        linux-tegra@...r.kernel.org
Subject: Re: [PATCH] gpio: tegra: Fix build error without CONFIG_DEBUG_FS

pt., 5 lip 2019 o 14:44 Yuehaibing <yuehaibing@...wei.com> napisał(a):
>
> On 2019/7/5 20:40, Bartosz Golaszewski wrote:
> > pt., 5 lip 2019 o 14:34 YueHaibing <yuehaibing@...wei.com> napisał(a):
> >>
> >> If CONFIG_DEBUG_FS is not set, building fails:
> >>
> >> drivers/gpio/gpio-tegra.c: In function tegra_gpio_probe:
> >> drivers/gpio/gpio-tegra.c:665:2: error: implicit declaration of function debugfs_create_file;
> >>  did you mean bus_create_file? [-Werror=implicit-function-declaration]
> >>   debugfs_create_file("tegra_gpio", 0444, NULL, tgi,
> >>   ^~~~~~~~~~~~~~~~~~~
> >>   bus_create_file
> >> drivers/gpio/gpio-tegra.c:666:9: error: tegra_dbg_gpio_fops undeclared (first use in this function);
> >>  did you mean tegra_gpio_pm_ops?
> >>         &tegra_dbg_gpio_fops);
> >>          ^~~~~~~~~~~~~~~~~~~
> >>          tegra_gpio_pm_ops
> >>
> >> Reported-by: Hulk Robot <hulkci@...wei.com>
> >> Fixes: a4de43049a1d ("gpio: tegra: Clean-up debugfs initialisation")
> >> Signed-off-by: YueHaibing <yuehaibing@...wei.com>
> >> ---
> >>  drivers/gpio/gpio-tegra.c | 2 ++
> >>  1 file changed, 2 insertions(+)
> >>
> >> diff --git a/drivers/gpio/gpio-tegra.c b/drivers/gpio/gpio-tegra.c
> >> index 59b99d8..40fd6bd 100644
> >> --- a/drivers/gpio/gpio-tegra.c
> >> +++ b/drivers/gpio/gpio-tegra.c
> >> @@ -662,8 +662,10 @@ static int tegra_gpio_probe(struct platform_device *pdev)
> >>                 }
> >>         }
> >>
> >> +#ifdef CONFIG_DEBUG_FS
> >>         debugfs_create_file("tegra_gpio", 0444, NULL, tgi,
> >>                             &tegra_dbg_gpio_fops);
> >> +#endif
> >>
> >>         return 0;
> >>  }
> >> --
> >> 2.7.4
> >>
> >>
> >
> > Nack, there are inline stubs for all debugfs functions in
> > ./include/linux/debugfs.h if CONFIG_DEBUG_FS is not selected. Just
> > move the #include <linux/debugfs.h> to the top of the source file.
>
> yes, agree this, but 'tegra_dbg_gpio_fops' is still undeclared.
>
> >
> > Bart
> >
> > .
> >
>

Can you attach the config you're using?

Bart

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