Re: [PATCH for-4.15 2/2] libs/foreignmem: Fix/simplify errno handling for map_resource

[Ian Jackson <iwj@xxxxxxxxxxxxxx>]

Andrew Cooper writes ("[PATCH for-4.15 2/2] libs/foreignmem: Fix/simplify errno 
handling for map_resource"):
> Simplify the FreeBSD logic, and duplicate it for NetBSD as the userpace ABI
> appears to be to consistently provide EOPNOTSUPP for missing Xen/Kernel
> support.
> 
> The Linux logic was contorted in what appears to be a deliberate attempt to
> skip the now-deleted logic for the EOPNOTSUPP case.  Simplify it.

Release-Acked-by: Ian Jackson <iwj@xxxxxxxxxxxxxx>

Sorry for my earlier confusion.  I had lost the context between the
two patches.  I will explain my reasoning for the R-A:

For the first two hunks (freebsd.c): these are consequential cleanup
from patch 1/2 of this series.  Splitting this up made this easier to
review and we don't want to leave the rather unfortunate constructs
which arise from some hunks of 1/1.  IOW, the combination of 1/1 plus
the first two hunks here is definitely release-worthy and the split
has helped review.

The final hunk is a straightforward bugfix.

This combination of two completely different kinds of thing is a bit
confusing but now that I have explained it to myself I'm satisfied.

Ian.