linux-kernel - Re: [PATCH v2 1/1] hung_task: fix warnings caused by unaligned lock pointers

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Message-ID: <4d270f51-d724-ecea-a9c4-7e6b3c20fcaf@linux-m68k.org>
Date: Wed, 10 Sep 2025 10:45:35 +1000 (AEST)
From: Finn Thain <fthain@...ux-m68k.org>
To: John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>
cc: Kent Overstreet <kent.overstreet@...ux.dev>, 
    Lance Yang <lance.yang@...ux.dev>, akpm@...ux-foundation.org, 
    amaindex@...look.com, anna.schumaker@...cle.com, boqun.feng@...il.com, 
    geert@...ux-m68k.org, ioworker0@...il.com, joel.granados@...nel.org, 
    jstultz@...gle.com, leonylgao@...cent.com, linux-kernel@...r.kernel.org, 
    linux-m68k@...ts.linux-m68k.org, longman@...hat.com, mhiramat@...nel.org, 
    mingo@...hat.com, mingzhe.yang@...com, oak@...sinkinet.fi, 
    peterz@...radead.org, rostedt@...dmis.org, senozhatsky@...omium.org, 
    tfiga@...omium.org, will@...nel.org, stable@...r.kernel.org
Subject: Re: [PATCH v2 1/1] hung_task: fix warnings caused by unaligned lock
 pointers


On Tue, 9 Sep 2025, John Paul Adrian Glaubitz wrote:

> I have been trying to change it upstream though 

That ship sailed decades ago.

> as the official SysV ELF ABI for m68k requires a 4-byte natural 
> alignment [1] ...
> 
> [1] https://people.debian.org/~glaubitz/m68k-sysv-abi.pdf (p. 29)
> 

GNU/Linux is not AT&T Unix and was never intended to be that. 
Hence, your old System V (trademark) binaries are not going to work, 
unfortunately.