From: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
To: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Kent Overstreet <kent.overstreet@linux.dev>,
Lance Yang <lance.yang@linux.dev>,
akpm@linux-foundation.org, amaindex@outlook.com,
anna.schumaker@oracle.com, boqun.feng@gmail.com,
fthain@linux-m68k.org, ioworker0@gmail.com,
joel.granados@kernel.org, jstultz@google.com,
leonylgao@tencent.com, linux-kernel@vger.kernel.org,
linux-m68k@lists.linux-m68k.org, longman@redhat.com,
mhiramat@kernel.org, mingo@redhat.com, mingzhe.yang@ly.com,
oak@helsinkinet.fi, peterz@infradead.org, rostedt@goodmis.org,
senozhatsky@chromium.org, tfiga@chromium.org, will@kernel.org,
stable@vger.kernel.org
Subject: Re: [PATCH v2 1/1] hung_task: fix warnings caused by unaligned lock pointers
Date: Wed, 10 Sep 2025 09:37:52 +0200 [thread overview]
Message-ID: <b94030984037e54a61f762f9aa62776ecd8082af.camel@physik.fu-berlin.de> (raw)
In-Reply-To: <CAMuHMdVMw3nUMtXhfhB5mgmsEZNuagna=6ywOuRsRRMFXHYwbA@mail.gmail.com>
On Wed, 2025-09-10 at 09:34 +0200, Geert Uytterhoeven wrote:
> > > Isn't m68k the only architecture that's weird like this?
> >
> > Yes, and it does this on Linux only. I have been trying to change it upstream
> > though as the official SysV ELF ABI for m68k requires a 4-byte natural alignment [1].
>
> M68k does this on various OSes and ABIs that predate or are not
> explicitly compatible with the SysV ELF ABI.
I know. I was talking in the context of SysV ELF systems.
> Other architectures like CRIS (1-byte alignment!) are no longer supported
> by Linux.
Yes, that's why we should take care of the alignment ;-).
> FWIW, doubles (and doublewords) are not naturally aligned in the
> SysV ELF ABI for i386, while doubles (no mention of doublewords)
> are naturally aligned in the SysV ELF ABI for m68k.
I wouldn't consider i386 a role model for us ;-).
Adrian
--
.''`. John Paul Adrian Glaubitz
: :' : Debian Developer
`. `' Physicist
`- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913
next prev parent reply other threads:[~2025-09-10 7:38 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-09 14:52 [PATCH v2 1/1] hung_task: fix warnings caused by unaligned lock pointers Lance Yang
2025-09-09 16:46 ` Kent Overstreet
2025-09-09 16:55 ` John Paul Adrian Glaubitz
2025-09-09 19:02 ` Kent Overstreet
2025-09-10 0:45 ` Finn Thain
2025-09-10 7:34 ` Geert Uytterhoeven
2025-09-10 7:37 ` John Paul Adrian Glaubitz [this message]
2025-09-10 0:07 ` Finn Thain
2025-09-10 0:51 ` Kent Overstreet
2025-09-10 1:35 ` Finn Thain
2025-09-10 1:48 ` Kent Overstreet
2025-09-10 6:40 ` Finn Thain
2025-09-10 6:52 ` Andreas Schwab
2025-09-10 7:39 ` John Paul Adrian Glaubitz
2025-09-10 7:45 ` Geert Uytterhoeven
2025-09-10 8:02 ` Finn Thain
2025-09-10 11:26 ` Andreas Schwab
2025-09-10 7:36 ` Geert Uytterhoeven
2025-09-10 11:57 ` Kent Overstreet
2025-10-07 20:56 ` Andrew Morton
2025-10-08 0:40 ` Finn Thain
2025-10-08 3:03 ` Lance Yang
2025-10-08 6:14 ` Finn Thain
2025-10-08 7:09 ` Lance Yang
2025-10-08 7:23 ` Lance Yang
2025-10-08 10:12 ` Finn Thain
2025-10-08 13:48 ` Lance Yang
2025-10-08 21:55 ` Finn Thain
2025-10-09 2:01 ` Lance Yang
2025-10-09 4:04 ` Andrew Morton
2025-10-09 7:11 ` Geert Uytterhoeven
2025-10-14 10:11 ` David Laight
2025-10-08 12:56 ` Eero Tamminen
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