Re: [PATCH RFC 1/3] arm64/gcs: Support reuse of GCS for exited threads

[Mark Brown]

On Fri, Sep 26, 2025 at 12:14:21PM +0100, Catalin Marinas wrote:
> On Thu, Sep 25, 2025 at 08:00:40PM +0100, Mark Brown wrote:

> > Yeah, just I need to convince myself that we're always running the
> > exit_mm() path in the context of the exiting thread.  Like you say it
> > needs checking but hopefully you're right and the current code is more
> > correct than I had thought.

> The only path to gcs_free() is via mm_release() -> deactivate_mm().
> mm_release() is called from either exit_mm_release() or
> exec_mm_release(). These two functions are only called with current and
> current->mm.

> I guess for historical reasons, they take task and mm parameters but in
> recent mainline, they don't seem to get anything other than current.

Thanks for checking for me.  I guess some refactoring might be in
order to make all this clear.

Attachment: signature.asc
Description: PGP signature