On Sun, Jul 06, 2025 at 07:45:04PM -0500, Catalin Marinas wrote:

On Fri, Jul 04, 2025 at 02:40:17PM +0100, Mark Rutland wrote:

quoted

On Fri, Jul 04, 2025 at 02:33:35PM +0100, Will Deacon wrote:

quoted

I would actually like to select VMAP_STACK unconditionally for arm64.
Historically, we were held back waiting for all the various KASAN modes
to support vmalloc properly, but I _think_ that's fixed now...

The VMAP_STACK dependency is:

	depends on !KASAN || KASAN_HW_TAGS || KASAN_VMALLOC

and in arm64 we have:

	select KASAN_VMALLOC if KASAN

so it should be fine to select it afaict.

Any reason not to do that?

Not that I am aware of.

I'm also in favour of unconditionally selecting VMAP_STACK.

So am I.

Thanks. I've played a bit with it, and did some mechanical work, and
send a v1.

https://lore.kernel.org/all/20250707-arm64_vmap-v1-0-8de98ca0f91c@debian.org/ (local)