linux-kernel - Re: [PATCH v2] Kbuild: fix issues with rustc-option

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAH5fLgh9t7=1sTwWWJHLtDxaaZYZAjLC8h_jVvC809hpqJz07g@mail.gmail.com>
Date: Wed, 9 Oct 2024 13:32:38 +0200
From: Alice Ryhl <aliceryhl@...gle.com>
To: Masahiro Yamada <masahiroy@...nel.org>
Cc: Nathan Chancellor <nathan@...nel.org>, Nicolas Schier <nicolas@...sle.eu>, 
	Miguel Ojeda <ojeda@...nel.org>, Matthew Maurer <mmaurer@...gle.com>, 
	Alex Gaynor <alex.gaynor@...il.com>, Boqun Feng <boqun.feng@...il.com>, 
	Gary Guo <gary@...yguo.net>, Björn Roy Baron <bjorn3_gh@...tonmail.com>, 
	Benno Lossin <benno.lossin@...ton.me>, Andreas Hindborg <a.hindborg@...nel.org>, 
	Trevor Gross <tmgross@...ch.edu>, linux-kbuild@...r.kernel.org, 
	linux-kernel@...r.kernel.org, rust-for-linux@...r.kernel.org
Subject: Re: [PATCH v2] Kbuild: fix issues with rustc-option

On Wed, Oct 9, 2024 at 12:32 PM Masahiro Yamada <masahiroy@...nel.org> wrote:
>
> On Wed, Oct 9, 2024 at 4:42 AM Alice Ryhl <aliceryhl@...gle.com> wrote:
> >
> > On Tue, Oct 8, 2024 at 9:00 PM Masahiro Yamada <masahiroy@...nel.org> wrote:
> > >
> > > On Wed, Oct 9, 2024 at 2:32 AM Alice Ryhl <aliceryhl@...gle.com> wrote:
> > > > diff --git a/scripts/Makefile.compiler b/scripts/Makefile.compiler
> > > > index 057305eae85c..08d5b7177ea8 100644
> > > > --- a/scripts/Makefile.compiler
> > > > +++ b/scripts/Makefile.compiler
> > > > @@ -21,6 +21,7 @@ TMPOUT = $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_$$$$
> > > >  # automatically cleaned up.
> > > >  try-run = $(shell set -e;              \
> > > >         TMP=$(TMPOUT)/tmp;              \
> > > > +       export RUSTC_BOOTSTRAP=1;       \
> > >
> > >
> > > try-run is not Rust-specific.
> > >
> > > Is there any reason why you did not add it
> > > to __rustc-option?
> > >
> > >
> > > __rustc-option = $(call try-run,\
> > >        RUSTC_BOOTSTRAP=1 $(1) $(2) $(3) --crate-type=rlib
> > > $(srctree)/rust/probe.rs --out-dir=$$TMP,$(3),$(4))
> >
> > I had an explanation for this in the commit message, but it looks like
> > it got lost when I rewrote it for v2. Anyway, the reason is that I'd
> > have to modify both __rustc-option and rustc-option-yn to do that, and
> > putting it here seemed more future-proof against making the same
> > mistake in any rustc-* commands added in the future.
>
>
> One solution is to delete rustc-option-yn since there are no users of it.
>
> Another solution is to refactor the code.
>
> Either way, there is no good reason for code duplication.
>
>
> If you keep rustc-option-yn, you can rebased v3 on top of this patch:
> https://lore.kernel.org/lkml/20241009102821.2675718-1-masahiroy@kernel.org/T/#u

I'll rebase on top of that. If we choose to delete rustc-option-yn
then I think we should first merge the refactor and then delete it in
a follow-up. That way, when someone does need it, they will find the
refactored implementation in the git history.

Alice