Re: [PATCH v2 3/7] mm: move vma_shrink(), vma_expand() to internal header

[Liam R. Howlett]

* Lorenzo Stoakes <lorenzo.stoakes@xxxxxxxxxx> [240704 15:28]:
> The vma_shrink() and vma_expand() functions are internal VMA manipulation
> functions which we ought to abstract for use outside of memory management
> code.
> 
> To achieve this, we replace shift_arg_pages() in fs/exec.c with an
> invocation of a new relocate_vma_down() function implemented in mm/mmap.c,
> which enables us to also move move_page_tables() and vma_iter_prev_range()
> to internal.h.
> 
> The purpose of doing this is to isolate key VMA manipulation functions in
> order that we can both abstract them and later render them easily testable.
> 
> Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@xxxxxxxxxx>

Reviewed-by: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>