linux-kernel - Re: linux-next: manual merge of the block tree with the asm-generic tree

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Message-Id: <cb4bb8e2-7dfe-4ca4-aa70-060f7b2f8f95@app.fastmail.com>
Date:   Mon, 09 Oct 2023 11:00:19 +0200
From:   "Arnd Bergmann" <arnd@...db.de>
To:     "Peter Zijlstra" <peterz@...radead.org>,
        "Stephen Rothwell" <sfr@...b.auug.org.au>
Cc:     "Jens Axboe" <axboe@...nel.dk>,
        "Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>,
        linux-next <linux-next@...r.kernel.org>,
        "Sohil Mehta" <sohil.mehta@...el.com>
Subject: Re: linux-next: manual merge of the block tree with the asm-generic tree

On Mon, Oct 9, 2023, at 10:48, Peter Zijlstra wrote:
> On Mon, Oct 09, 2023 at 12:31:18PM +1100, Stephen Rothwell wrote:
>> diff --cc arch/alpha/kernel/syscalls/syscall.tbl
>> index 5d05ab716a74,b1865f9bb31e..000000000000
>> --- a/arch/alpha/kernel/syscalls/syscall.tbl
>> +++ b/arch/alpha/kernel/syscalls/syscall.tbl
>> @@@ -492,4 -492,6 +492,7 @@@
>>   560	common	set_mempolicy_home_node		sys_ni_syscall
>>   561	common	cachestat			sys_cachestat
>>   562	common	fchmodat2			sys_fchmodat2
>>  -563	common	futex_wake			sys_futex_wake
>>  -564	common	futex_wait			sys_futex_wait
>>  -565	common	futex_requeue			sys_futex_requeue
>>  +563	common	map_shadow_stack		sys_map_shadow_stack
>> ++564	common	futex_wake			sys_futex_wake
>> ++565	common	futex_wait			sys_futex_wait
>> ++566	common	futex_requeue			sys_futex_requeue
>
> So this renumbers the (futex) stuff on Alpha, does anybody care? AFAICT
> Alpha does not follow the unistd order and meh.

Let's not make it worse for now. All the numbers since the
introduction of the time64 syscalls are offset by exactly 120
on alpha, and I'd prefer to keep it that way for the moment.

I still hope to eventually finish the conversion of all architectures
to a single syscall.tbl for numbers >400, and if that happens before
the end of alpha, a different ordering would just be extra pain.

    Arnd