linux-kernel - Re: [PATCH] syscalls: fix syscall macros for newfstat/newfstatat

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Message-ID: <ZrEtyJd2qydKcWxQ@tucnak>
Date: Mon, 5 Aug 2024 21:53:44 +0200
From: Jakub Jelinek <jakub@...hat.com>
To: Arnd Bergmann <arnd@...db.de>
Cc: Rudi Heitbaum <rudi@...tbaum.com>, Arnd Bergmann <arnd@...nel.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>, Huacai Chen <chenhuacai@...nel.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>,
        Andreas Schwab <schwab@...e.de>, Florian Weimer <fweimer@...hat.com>,
        linux-riscv@...ts.infradead.org, linux-arm-kernel@...ts.infradead.org,
        linux-api@...r.kernel.org, WANG Xuerui <kernel@...0n.name>,
        Masami Hiramatsu <mhiramat@...nel.org>, linux-kernel@...r.kernel.org,
        loongarch@...ts.linux.dev
Subject: Re: [PATCH] syscalls: fix syscall macros for newfstat/newfstatat

On Sat, Aug 03, 2024 at 10:12:47AM +0200, Arnd Bergmann wrote:
> > Probably it would be useful to check
> > echo '#include <asm/unistd.h>' | gcc -E -dD -xc - | grep '#define __NR_' | sort
> > for all arches between 6.10 and the latest git, diff them and resolve any
> > unintended differences.
> 
> Right, I should have done that before the original series really:
> I spent a lot of time validating the kernel's internal changes for
> consistency (which found a dozen bugs that were unrelated to my
> series) but missed the unintended changes to the external header
> contents.
> 
> I'll do that now and send another fixup.

I've done 6.10 to 6.11-rc2 <asm/unistd.h> comparison just for the Fedora
arches (x86_64, aarch64, ppc64le, s390x, i686).  Full details in
https://bugzilla.redhat.com/show_bug.cgi?id=2301919#c8
On i686, ppc64le and s390x there are no changes.
On x86_64
#define __NR_uretprobe 335
has been added, perhaps that is intentional, haven't checked.
On aarch64 when going just after __NR_ defined macros and their values,
I see:
#define __NR_nfsservctl 42
#define __NR_fstat 80
#define __NR_arch_specific_syscall 244
#define __NR_syscalls 463
removal and
#define __NR_newfstat 80
and addition and then
#define __NR3264_fcntl 25
#define __NR3264_statfs 43
#define __NR3264_fstatfs 44
#define __NR3264_truncate 45
#define __NR3264_ftruncate 46
#define __NR3264_lseek 62
#define __NR3264_sendfile 71
#define __NR3264_fstatat 79
#define __NR3264_fstat 80
#define __NR3264_mmap 222
#define __NR3264_fadvise64 223
macros are removed as well (let's hope it is an implementation detail and
nothing uses those macros, but some search would be helpful).

	Jakub