[PATCH 1/2] ARM: fix building NOMMU ARMv4/v5 kernels

[Linus Walleij]

On Wed, Mar 9, 2022 at 3:41 PM Arnd Bergmann <arnd at kernel.org> wrote:

> From: Arnd Bergmann <arnd at arndb.de>
>
> The removal of the old-style irq entry broke obscure NOMMU
> configurations on machines that have an MMU:
>
> ld.lld: error: undefined symbol: generic_handle_arch_irq
>  referenced by kernel/entry-armv.o:(__irq_svc) in archive arch/arm/built-in.a
>
> A follow-up patch to convert nvic to the generic_handle_arch_irq()
> could have fixed this by removing the Kconfig conditional, but did
> it differently.
>
> Change the Kconfig logic so ARM machines now unconditionally
> enable the feature.
>
> I have also submitted a patch to remove support for the configurations
> that broke, but fixing the regression first is a trivial and correct
> change.
>
> Reported-by: kernel test robot <lkp at intel.com>
> Fixes: 54f481a2308e ("ARM: remove old-style irq entry")
> Fixes: 52d240871760 ("irqchip: nvic: Use GENERIC_IRQ_MULTI_HANDLER")
> Signed-off-by: Arnd Bergmann <arnd at arndb.de>

Reviewed-by: Linus Walleij <linus.walleij at linaro.org>

Thanks for fixing this so quickly!

Yours,
Linus Walleij