Re: [PATCH v2] gpio: vr41xx: Use spurious_interrupt() and export it to modules

[Florian Fainelli]

On 5/23/22 20:28, Genjian Zhang wrote:
> From: huhai <huhai@xxxxxxxxxx>
>
> modpost complains once these drivers become modules.
>    ERROR: modpost: "irq_err_count" [drivers/gpio/gpio-vr41xx.ko] undefined!
>
> Fix it by use spurious_interrupt() and export spurious_interrupt() when
> that symbol is =m.
>
> Fixes: 27fdd325dace ("MIPS: Update VR41xx GPIO driver to use gpiolib")
> Suggested-by: Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx>
> Reported-by: k2ci <kernel-bot@xxxxxxxxxx>
> Signed-off-by: huhai <huhai@xxxxxxxxxx>
> ---
>   arch/mips/kernel/irq.c     | 3 +++
>   drivers/gpio/gpio-vr41xx.c | 2 +-
>   2 files changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/arch/mips/kernel/irq.c b/arch/mips/kernel/irq.c
> index 5e11582fe308..69f9a46bf9e5 100644
> --- a/arch/mips/kernel/irq.c
> +++ b/arch/mips/kernel/irq.c
> @@ -49,6 +49,9 @@ asmlinkage void spurious_interrupt(void)
>   {
>   	atomic_inc(&irq_err_count);
>   }
> +#ifdef CONFIG_GPIO_VR41XX_MODULE
> +EXPORT_SYMBOL_GPL(spurious_interrupt);
> +#endif

You should not be exporting for just a specific configuration, export it 
unconditionally. The generic IRQ layer however prefers to use 
handle_bad_irq() which is already exported, can you consider using that?
--
Florian