On Mon, Jun 15, 2020 at 5:50 PM Luc Van Oostenryck
<luc.vanoostenryck@xxxxxxxxx> wrote:
>
> Sparse supports named address spaces since v0.6.0-rc1.
> This gives much nicer warnings ('... __user' instead of '... <asn:1>')
> but this featres is not yet used in the kernel since it could be
> a problem for people using an older version of Sparse.
Actually, I think it's more that nobody has sent a tested patch.
I don't think it's a big burden to say "you need a newer version of
sparse" for kernel checkers, and in fact a number of the problems
people report then get answered with "update your sparse version"
anyway for other reasons.
In fact, I'd personally like to just make the kernel use _Generic()
everywhere now that we started getting our toes wet, but the fact that
we would have to require gcc-4.9 (instead of gcc-4.8 which is
currently the minimum version) is holding us back.
So I'd be perfectly happy to take a patch to do the ASN names, and to
remove the __CHECKER__ thing that holds us back from using _Generic()
with sparse. And just document that you need to have a recent enough
release..
Linus
