linux-kernel - Re: [PATCH 4/4] arm64: drop binutils version checks

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Message-ID: <20250411160225.GA5675@willie-the-truck>
Date: Fri, 11 Apr 2025 17:02:26 +0100
From: Will Deacon <will@...nel.org>
To: Arnd Bergmann <arnd@...db.de>
Cc: Arnd Bergmann <arnd@...nel.org>, linux-kbuild@...r.kernel.org,
	"H. Peter Anvin" <hpa@...or.com>, Ard Biesheuvel <ardb@...nel.org>,
	Borislav Petkov <bp@...en8.de>, Brian Gerst <brgerst@...il.com>,
	Catalin Marinas <catalin.marinas@....com>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	Herbert Xu <herbert@...dor.apana.org.au>,
	Ingo Molnar <mingo@...hat.com>, Jonathan Corbet <corbet@....net>,
	Marc Zyngier <maz@...nel.org>, Mark Rutland <mark.rutland@....com>,
	Masahiro Yamada <masahiroy@...nel.org>,
	Nathan Chancellor <nathan@...nel.org>,
	Nicolas Schier <nicolas@...sle.eu>, Takashi Iwai <tiwai@...e.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Uros Bizjak <ubizjak@...il.com>,
	linux-arm-kernel@...ts.infradead.org, linux-crypto@...r.kernel.org,
	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-raid@...r.kernel.org, x86@...nel.org
Subject: Re: [PATCH 4/4] arm64: drop binutils version checks

On Tue, Apr 08, 2025 at 03:10:57PM +0200, Arnd Bergmann wrote:
> On Tue, Apr 8, 2025, at 10:46, Will Deacon wrote:
> > Hi Arnd,
> >
> > On Mon, Apr 07, 2025 at 11:41:16AM +0200, Arnd Bergmann wrote:
> >> From: Arnd Bergmann <arnd@...db.de>
> >> 
> >> Now that gcc-8 and binutils-2.30 are the minimum versions, a lot of
> >> the individual feature checks can go away for simplification.
> >> 
> >> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> >> ---
> >>  arch/arm64/Kconfig              | 37 ++-------------------------------
> >>  arch/arm64/Makefile             | 21 ++-----------------
> >>  arch/arm64/include/asm/rwonce.h |  4 ----
> >>  arch/arm64/kvm/Kconfig          |  1 -
> >>  arch/arm64/lib/xor-neon.c       |  2 +-
> >>  5 files changed, 5 insertions(+), 60 deletions(-)
> >
> > Since some of these checks are dynamic (i.e. they try passing various
> > options to the tools to see if they barf), have you checked that the
> > minimum supported version of clang implements them all?
> 
> I did some randconfig build testing with clang-13/lld-13, since that
> is the oldest supported version, and checked that the options are
> all supported. I'm pretty sure it's been there for a long time before
> that already.

Thanks (especially to Mark!) for checking.

Will