Subject: Re: linux-next: build failure after merge of the powerpc tree

From: Michael Ellerman <[email-masked]>
Date: Fri, 4 Oct 2019 09:05:44 +1000 (AEST)

On Mon, 2019-09-30 at 00:13:42 UTC, Stephen Rothwell wrote:
> Hi all,
> 
> After merging the powerpc tree, today's linux-next build (powerpc64
> allnoconfig) failed like this:
> 
> arch/powerpc/mm/book3s64/pgtable.c: In function 'flush_partition':
> arch/powerpc/mm/book3s64/pgtable.c:216:3: error: implicit declaration of fu> nction 'radix__flush_all_lpid_guest'; did you mean 'radix__flush_all_lpid'?>  [-Werror=implicit-function-declaration]
>   216 |   radix__flush_all_lpid_guest(lpid);
>       |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~
>       |   radix__flush_all_lpid
> 
> Caused by commit
> 
>   99161de3a283 ("powerpc/64s/radix: tidy up TLB flushing code")
> 
> radix__flush_all_lpid_guest() is only declared for CONFIG_PPC_RADIX_MMU
> which is not set for this build.
> 
> I am not sure why this did not show up earlier (maybe a Kconfig
> change?).
> 
> I added the following hack for today.
> 
> From: Stephen Rothwell <[email-masked]>
> Date: Mon, 30 Sep 2019 10:09:17 +1000
> Subject: [PATCH] powerpc/64s/radix: fix for "tidy up TLB flushing code" and
>  !CONFIG_PPC_RADIX_MMU
> 
> Signed-off-by: Stephen Rothwell <[email-masked]>

Applied to powerpc fixes, thanks.

https://git.kernel.org/powerpc/c/8996ae8f05a1cc5559120aaec36183edb9c68c50

cheers