linux-kernel - Re: [PATCH v3 10/24] sparc: Remove COMMAND_LINE

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Date:   Tue, 14 Feb 2023 12:11:09 +0300
From:   Sergey Shtylyov <s.shtylyov@....ru>
To:     WANG Xuerui <kernel@...0n.name>,
        Alexandre Ghiti <alexghiti@...osinc.com>,
        Jonathan Corbet <corbet@....net>,
        Richard Henderson <richard.henderson@...aro.org>,
        Ivan Kokshaysky <ink@...assic.park.msu.ru>,
        Matt Turner <mattst88@...il.com>,
        Vineet Gupta <vgupta@...nel.org>,
        Russell King <linux@...linux.org.uk>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Huacai Chen <chenhuacai@...nel.org>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Michal Simek <monstr@...str.eu>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        "James E . J . Bottomley" <James.Bottomley@...senPartnership.com>,
        Helge Deller <deller@....de>,
        Michael Ellerman <mpe@...erman.id.au>,
        Nicholas Piggin <npiggin@...il.com>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Heiko Carstens <hca@...ux.ibm.com>,
        Vasily Gorbik <gor@...ux.ibm.com>,
        Alexander Gordeev <agordeev@...ux.ibm.com>,
        Christian Borntraeger <borntraeger@...ux.ibm.com>,
        Sven Schnelle <svens@...ux.ibm.com>,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        Rich Felker <dalias@...c.org>,
        "David S . Miller" <davem@...emloft.net>,
        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>, Chris Zankel <chris@...kel.net>,
        Max Filippov <jcmvbkbc@...il.com>,
        Arnd Bergmann <arnd@...db.de>, <linux-doc@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-alpha@...r.kernel.org>,
        <linux-snps-arc@...ts.infradead.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-ia64@...r.kernel.org>, <loongarch@...ts.linux.dev>,
        <linux-m68k@...ts.linux-m68k.org>, <linux-mips@...r.kernel.org>,
        <linux-parisc@...r.kernel.org>, <linuxppc-dev@...ts.ozlabs.org>,
        <linux-riscv@...ts.infradead.org>, <linux-s390@...r.kernel.org>,
        <linux-sh@...r.kernel.org>, <sparclinux@...r.kernel.org>,
        <linux-xtensa@...ux-xtensa.org>, <linux-arch@...r.kernel.org>
CC:     Palmer Dabbelt <palmer@...osinc.com>
Subject: Re: [PATCH v3 10/24] sparc: Remove COMMAND_LINE_SIZE from uapi

On 2/14/23 11:59 AM, WANG Xuerui wrote:
[...]

>>> From: Palmer Dabbelt <palmer@...osinc.com>
>>>
>>> As far as I can tell this is not used by userspace and thus should not
>>> be part of the user-visible API.
>>>
>>> Signed-off-by: Palmer Dabbelt <palmer@...osinc.com>
>>> ---
>>>   arch/sparc/include/asm/setup.h      | 6 +++++-
>>>   arch/sparc/include/uapi/asm/setup.h | 7 -------
>>>   2 files changed, 5 insertions(+), 8 deletions(-)
>>>
>>> diff --git a/arch/sparc/include/asm/setup.h b/arch/sparc/include/asm/setup.h
>>> index 72205684e51e..d1384ed92547 100644
>>> --- a/arch/sparc/include/asm/setup.h
>>> +++ b/arch/sparc/include/asm/setup.h
>>> @@ -7,7 +7,11 @@
>>>     #include <linux/interrupt.h>
>>>   -#include <uapi/asm/setup.h>
>>> +#if defined(__sparc__) && defined(__arch64__)
>>
>>     Mhm, I don't think these two can be #define'd simulaneously...
> 
> I believe it's just a SPARC-ism [1] [2] that may look strange and be easily confused for __aarch64__ (notice the extra 'a')...

  Yeah, sorry, I did confuse it with AArgh64. :-)

[...]

MNR, Sergey