arch/arm64/kernel/mte.c:121:15: error: 'mte_enable_kernel_sync' undeclared here (not in a function); did you mean 'mte_enable_kernel'?

[Andrey Konovalov]

On Tue, Feb 2, 2021 at 11:09 AM Anders Roxell <anders.roxell at linaro.org> wrote:
>
> Hi,
>
> I've seen this failure on tag next-20210202:
> arch/arm64/kernel/mte.c:121:15: error: 'mte_enable_kernel_sync'
> undeclared here (not in a function); did you mean 'mte_enable_kernel'?
>
> I think it may be a merge conflict that didn't get resolved correctly?

Yes, that patch was supposed to go on top of another one (which
actually renames mte_enable_kernel to mte_enable_kernel_sync), but the
latter wasn't picked up into mm.

> The below change fixed the issue:
>
> diff --git a/arch/arm64/kernel/mte.c b/arch/arm64/kernel/mte.c
> index 275b5d0f38b8..8f5bd1293496 100644
> --- a/arch/arm64/kernel/mte.c
> +++ b/arch/arm64/kernel/mte.c
> @@ -118,7 +118,7 @@ void mte_set_report_once(bool state)
>  {
>   WRITE_ONCE(report_fault_once, state);
>  }
> -EXPORT_SYMBOL(mte_enable_kernel_sync);
> +EXPORT_SYMBOL(mte_enable_kernel);
>  EXPORT_SYMBOL(mte_set_report_once);
>
>  bool mte_report_once(void)

The changed export also needs to be moved next to mte_enable_kernel().

Thanks!