From: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
To: debian-68k <debian-68k@lists.debian.org>
Cc: linux-m68k <linux-m68k@vger.kernel.org>
Subject: Re: [PATCH 1/1] hung_task: fix warnings by enforcing alignment on lock structures
Date: Sat, 23 Aug 2025 13:06:08 +0200 [thread overview]
Message-ID: <110b6ca9b56e87e6bcfd058a284f25453bc90465.camel@physik.fu-berlin.de> (raw)
In-Reply-To: <20250823074048.92498-1-lance.yang@linux.dev>
On Sat, 2025-08-23 at 15:40 +0800, Lance Yang wrote:
> From: Lance Yang <lance.yang@linux.dev>
>
> The blocker tracking mechanism assumes that lock pointers are at least
> 4-byte aligned to use their lower bits for type encoding.
>
> However, as reported by Geert Uytterhoeven, some architectures like m68k
> only guarantee 2-byte alignment of 32-bit values. This breaks the
> assumption and causes two related WARN_ON_ONCE checks to trigger.
Another case for switching Debian m68k to 32-bit alignment.
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:[~2025-08-23 11:06 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20250414145945.84916-1-ioworker0@gmail.com>
[not found] ` <20250414145945.84916-3-ioworker0@gmail.com>
2025-08-22 7:38 ` [PATCH v5 2/3] hung_task: show the blocker task if the task is hung on semaphore Geert Uytterhoeven
2025-08-22 15:18 ` Lance Yang
2025-08-22 15:37 ` Geert Uytterhoeven
2025-08-22 16:42 ` Lance Yang
2025-08-23 0:27 ` Finn Thain
2025-08-23 4:47 ` Lance Yang
2025-08-23 5:00 ` [PATCH 1/1] hung_task: fix warnings caused by unaligned lock pointers Lance Yang
2025-08-26 4:49 ` Masami Hiramatsu
2025-08-26 5:11 ` Lance Yang
2025-08-23 7:40 ` [PATCH 1/1] hung_task: fix warnings by enforcing alignment on lock structures Lance Yang
2025-08-23 11:06 ` John Paul Adrian Glaubitz [this message]
2025-08-23 21:53 ` kernel test robot
2025-08-24 0:47 ` Finn Thain
2025-08-24 3:03 ` Lance Yang
2025-08-24 4:18 ` Finn Thain
2025-08-24 5:02 ` Lance Yang
2025-08-24 5:57 ` Finn Thain
2025-08-24 6:18 ` Lance Yang
2025-08-26 5:02 ` Masami Hiramatsu
2025-08-26 5:16 ` Lance Yang
2025-08-23 7:49 ` [PATCH v5 2/3] hung_task: show the blocker task if the task is hung on semaphore Lance Yang
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