[Intel-gfx] ✗ Fi.CI.BUILD: failure for Return head pages from find_get_entry and find_lock_entry

[Matthew Wilcox]

On Wed, Aug 19, 2020 at 07:06:17PM -0000, Patchwork wrote:
>   CC      mm/swap_state.o
> mm/swap_state.c: In function ‘find_get_swap_page’:
> mm/swap_state.c:435:7: error: implicit declaration of function ‘shmem_mapping’; did you mean ‘page_mapping’? [-Werror=implicit-function-declaration]
>   if (!shmem_mapping(mapping))
>        ^~~~~~~~~~~~~
>        page_mapping
> cc1: some warnings being treated as errors

Never mind the .config; I decided on a way to fix it without seeing that.
It would be useful for future warnings though.