linux-next: build failure after merge of the tip tree

[Benjamin Gray]

On Fri, 2022-12-02 at 11:26 +1100, Stephen Rothwell wrote:
> Though, I wonder if the powerpc tree should
> use mm_alloc() instead of copy_init_mm() as well?  The tip tree
> commit
> says:
> 
>     Instead of duplicating init_mm, allocate a fresh mm. The
> advantage is
>     that mm_alloc() has much simpler dependencies. Additionally it
> makes
>     more conceptual sense, init_mm has no (and must not have) user
> state
>     to duplicate.
> 

Yes, that seems fine. All we need is that the page table isn't shared
and the kernel mappings are the same as in init_mm. It seems mm_alloc()
does this at some point.