Re: [PATCH 1/8] mm: use zone lock guard in reserve_highatomic_pageblock()

[Peter Zijlstra]

On Thu, Mar 12, 2026 at 04:40:45PM -0700, Dan Williams wrote:
> Peter Zijlstra wrote:
> [..]
> > However, looking at things again, I think we can get rid of that
> > unconditional __GUARD_IS_ERR(), something like the below, Dan?
> 
> I think it makes sense, do not make everyone pay the cost of
> __GUARD_IS_ERR() at least until a better __GUARD_IS_ERR() comes along.
> 
> I gave the below a run through the CXL subsystem tests which uses
> conditional guards quite a bit. Worked fine, and looks good to me.
> 
> So feel free to add a "tested by" from me. Not putting the actual tag
> here so that b4 does not slurp a tag for the wrong patchset.

Excellent, thanks for having a look. Let me go write it up.