linux-kernel - Re: [PATCH V11 00/22] arch: Add basic LoongArch support

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Message-ID: <bb9536df-748d-5fc6-bc04-78cfd28a24e0@xen0n.name>
Date:   Sun, 22 May 2022 12:18:29 +0800
From:   WANG Xuerui <kernel@...0n.name>
To:     Huacai Chen <chenhuacai@...ngson.cn>,
        Arnd Bergmann <arnd@...db.de>,
        Andy Lutomirski <luto@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Peter Zijlstra <peterz@...radead.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        David Airlie <airlied@...ux.ie>,
        Jonathan Corbet <corbet@....net>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     linux-arch@...r.kernel.org, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, Xuefeng Li <lixuefeng@...ngson.cn>,
        Yanteng Si <siyanteng@...ngson.cn>,
        Huacai Chen <chenhuacai@...il.com>,
        Guo Ren <guoren@...nel.org>, Xuerui Wang <kernel@...0n.name>,
        Jiaxun Yang <jiaxun.yang@...goat.com>,
        Stephen Rothwell <sfr@...b.auug.org.au>
Subject: Re: [PATCH V11 00/22] arch: Add basic LoongArch support

On 5/18/22 17:25, Huacai Chen wrote:
> [snip]
>
> V10 -> V11:
> 1, Rebased on asm-generic tree;
> 2, Fix fpreg macros definition;
> 3, Fix ELF ABI macros definition;
> 4, Fix magic number definition in efi header;
> 5, Remove unneeded swab.h, bitfield.h and rtc.c;
> 6, Remove __ARCH_WANT_NEW_STAT (glibc need update);

Regarding the syscall ABI change taking out fstat and newfstatat, I've 
done the following to ensure a clean path forward:

- Sent glibc patch [1] for upstream review;
- Filed [2] on Loongson's glibc fork for them to test, and incorporate 
the 2nd patch in their port;
- Updated my tool [3] for the small number of end users already on the 
previous ABI (me included, actually), to easily check if their systems 
are compatible before moving to newer kernels.

[1]: https://sourceware.org/pipermail/libc-alpha/2022-May/138958.html
[2]: https://github.com/loongson/glibc/pull/29
[3]: https://github.com/xen0n/shengloong

> 7, Improve documents as WANG Xuerui suggested;
> 8, Some other minor fixes and improvements.