Re: [PATCH v2 3/8] x86/mm: Remove "static" from vmap_pages_range()

[Christoph Hellwig]

On Tue, Nov 21, 2023 at 01:20:11PM -0800, mhkelley58@xxxxxxxxx wrote:
> From: Michael Kelley <mhklinux@xxxxxxxxxxx>
> 
> The mm subsystem currently provides no mechanism to map memory pages
> to a specified virtual address range.  A virtual address range can be
> allocated using get_vm_area(), but the only function available for
> mapping memory pages to a caller-specified address in that range is
> ioremap_page_range(), which is inappropriate for system memory.
> 
> Fix this by allowing vmap_pages_range() to be used by callers outside
> of vmalloc.c.

I really do not want to expose vmap_pages_range.  Please try to come up
with a good way to encapsulate your map at a certain address primitive
and implement it in vmalloc.c.