linux-kernel - Re: [PATCH v2 07/12] parisc/percpu: Work around the lack of __SIZEOF_INT128_

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Message-ID: <467644b2-48e0-afcb-64df-044bfef1091e@gmx.de>
Date:   Fri, 2 Jun 2023 22:42:36 +0200
From:   Helge Deller <deller@....de>
To:     Peter Zijlstra <peterz@...radead.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Masahiro Yamada <masahiroy@...nel.org>,
        Arnd Bergmann <arnd@...db.de>,
        Jonathan Corbet <corbet@....net>,
        Will Deacon <will@...nel.org>,
        Boqun Feng <boqun.feng@...il.com>,
        Mark Rutland <mark.rutland@....com>,
        Catalin Marinas <catalin.marinas@....com>, dennis@...nel.org,
        Tejun Heo <tj@...nel.org>, Christoph Lameter <cl@...ux.com>,
        Heiko Carstens <hca@...ux.ibm.com>, gor@...ux.ibm.com,
        Alexander Gordeev <agordeev@...ux.ibm.com>,
        borntraeger@...ux.ibm.com, Sven Schnelle <svens@...ux.ibm.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
        "H. Peter Anvin" <hpa@...or.com>, Joerg Roedel <joro@...tes.org>,
        suravee.suthikulpanit@....com, Robin Murphy <robin.murphy@....com>,
        David Woodhouse <dwmw2@...radead.org>,
        Baolu Lu <baolu.lu@...ux.intel.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "David S . Miller" <davem@...emloft.net>,
        Pekka Enberg <penberg@...nel.org>,
        David Rientjes <rientjes@...gle.com>,
        Joonsoo Kim <iamjoonsoo.kim@....com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Vlastimil Babka <vbabka@...e.cz>,
        Roman Gushchin <roman.gushchin@...ux.dev>,
        Hyeonggon Yoo <42.hyeyoo@...il.com>, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        linux-s390@...r.kernel.org, iommu@...ts.linux.dev,
        Linux-Arch <linux-arch@...r.kernel.org>,
        linux-crypto@...r.kernel.org,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Michael Ellerman <mpe@...erman.id.au>,
        "James E . J . Bottomley" <James.Bottomley@...senpartnership.com>,
        linux-parisc@...r.kernel.org,
        John David Anglin <dave.anglin@...l.net>,
        Sam James <sam@...too.org>
Subject: Re: [PATCH v2 07/12] parisc/percpu: Work around the lack of
 __SIZEOF_INT128__

On 6/2/23 16:39, Peter Zijlstra wrote:
> On Thu, Jun 01, 2023 at 09:29:18AM -0400, Linus Torvalds wrote:
>
>> Right now we have that "minimum gcc version" in a somewhat annoying
>> place: it's in the ./scripts/min-tool-version.sh file as a shell
>> script.
>
> Something like so then?
>
> ---
> Subject: parisc: Raise minimal GCC version
> From: Peter Zijlstra <peterz@...radead.org>
> Date: Fri Jun  2 16:33:54 CEST 2023
>
> With 64bit builds depending on __SIZEOF_INT128__ raise the parisc
> minimum compiler version to gcc-11.0.0.
>
> All other 64bit architectures provide this from GCC-5.1.0 (and
> probably before), except hppa64 which only started advertising this
> with GCC-11.
>
> Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>

The patch raises the compiler for 32- and 64-bit parisc builds, but that's OK.

So:
Acked-by: Helge Deller <deller@....de>

Thank you!
Helge


> ---
>   scripts/min-tool-version.sh |    6 +++++-
>   1 file changed, 5 insertions(+), 1 deletion(-)
>
> --- a/scripts/min-tool-version.sh
> +++ b/scripts/min-tool-version.sh
> @@ -17,7 +17,11 @@ binutils)
>   	echo 2.25.0
>   	;;
>   gcc)
> -	echo 5.1.0
> +	if [ "$SRCARCH" = parisc ]; then
> +		echo 11.0.0
> +	else
> +		echo 5.1.0
> +	fi
>   	;;
>   llvm)
>   	if [ "$SRCARCH" = s390 ]; then