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From: Frederic Weisbecker <frederic@kernel.org>
To: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: "Leonardo Bras" <leobras.c@gmail.com>,
	"Jonathan Corbet" <corbet@lwn.net>,
	"Shuah Khan" <skhan@linuxfoundation.org>,
	"Peter Zijlstra" <peterz@infradead.org>,
	"Ingo Molnar" <mingo@redhat.com>, "Will Deacon" <will@kernel.org>,
	"Boqun Feng" <boqun@kernel.org>,
	"Waiman Long" <longman@redhat.com>,
	"Andrew Morton" <akpm@linux-foundation.org>,
	"David Hildenbrand" <david@kernel.org>,
	"Lorenzo Stoakes" <ljs@kernel.org>,
	"Liam R. Howlett" <liam@infradead.org>,
	"Vlastimil Babka" <vbabka@kernel.org>,
	"Mike Rapoport" <rppt@kernel.org>,
	"Suren Baghdasaryan" <surenb@google.com>,
	"Michal Hocko" <mhocko@suse.com>, "Jann Horn" <jannh@google.com>,
	"Pedro Falcato" <pfalcato@suse.de>,
	"Brendan Jackman" <jackmanb@google.com>,
	"Johannes Weiner" <hannes@cmpxchg.org>, "Zi Yan" <ziy@nvidia.com>,
	"Harry Yoo" <harry@kernel.org>, "Hao Li" <hao.li@linux.dev>,
	"Christoph Lameter" <cl@gentwo.org>,
	"David Rientjes" <rientjes@google.com>,
	"Roman Gushchin" <roman.gushchin@linux.dev>,
	"Chris Li" <chrisl@kernel.org>,
	"Kairui Song" <kasong@tencent.com>,
	"Kemeng Shi" <shikemeng@huaweicloud.com>,
	"Nhat Pham" <nphamcs@gmail.com>, "Baoquan He" <bhe@redhat.com>,
	"Barry Song" <baohua@kernel.org>,
	"Youngjun Park" <youngjun.park@lge.com>,
	"Qi Zheng" <qi.zheng@linux.dev>,
	"Shakeel Butt" <shakeel.butt@linux.dev>,
	"Axel Rasmussen" <axelrasmussen@google.com>,
	"Yuanchu Xie" <yuanchu@google.com>, "Wei Xu" <weixugc@google.com>,
	"Borislav Petkov (AMD)" <bp@alien8.de>,
	"Randy Dunlap" <rdunlap@infradead.org>,
	"Feng Tang" <feng.tang@linux.alibaba.com>,
	"Dapeng Mi" <dapeng1.mi@linux.intel.com>,
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	"Li RongQing" <lirongqing@baidu.com>,
	"Eric Biggers" <ebiggers@kernel.org>,
	"Paul E. McKenney" <paulmck@kernel.org>,
	"Nathan Chancellor" <nathan@kernel.org>,
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	"Thomas Weißschuh" <thomas.weissschuh@linutronix.de>,
	"Thomas Gleixner" <tglx@kernel.org>,
	"Douglas Anderson" <dianders@chromium.org>,
	"Gary Guo" <gary@garyguo.net>,
	"Christian Brauner" <brauner@kernel.org>,
	"Pasha Tatashin" <pasha.tatashin@soleen.com>,
	"Coiby Xu" <coxu@redhat.com>,
	"Masahiro Yamada" <masahiroy@kernel.org>,
	linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-mm@kvack.org, linux-rt-devel@lists.linux.dev,
	"Marcelo Tosatti" <mtosatti@redhat.com>
Subject: Re: [PATCH v4 1/4] Introducing pw_lock() and per-cpu queue & flush work
Date: Wed, 20 May 2026 16:47:35 +0200	[thread overview]
Message-ID: <ag3Jh-8iUdgKvw5y@localhost.localdomain> (raw)
In-Reply-To: <20260520134832.WS7TrMnu@linutronix.de>

Le Wed, May 20, 2026 at 03:48:32PM +0200, Sebastian Andrzej Siewior a écrit :
> How likely is it, that you you had users before late_initcall()? Also
> can it happen that one of them uses one function to lock and the other
> unlock in this brief window? There is no check if this was used before
> static_branch usage.

Or let alone initialization on the wrong member of the union.

-- 
Frederic Weisbecker
SUSE Labs

  reply	other threads:[~2026-05-20 14:47 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-05-19  1:27 [PATCH v4 0/4] Introduce Per-CPU Work helpers (was QPW) Leonardo Bras
2026-05-19  1:27 ` [PATCH v4 1/4] Introducing pw_lock() and per-cpu queue & flush work Leonardo Bras
2026-05-20 10:08   ` Frederic Weisbecker
2026-05-20 13:48   ` Sebastian Andrzej Siewior
2026-05-20 14:47     ` Frederic Weisbecker [this message]
2026-05-20 22:06   ` Randy Dunlap
2026-05-26 19:15   ` Jonathan Corbet
2026-05-19  1:27 ` [PATCH v4 2/4] mm/swap: move bh draining into a separate workqueue Leonardo Bras
2026-05-19  1:27 ` [PATCH v4 3/4] swap: apply new pw_queue_on() interface Leonardo Bras
2026-05-20 15:07   ` Sebastian Andrzej Siewior
2026-05-19  1:27 ` [PATCH v4 4/4] slub: " Leonardo Bras
2026-05-20 14:53   ` Sebastian Andrzej Siewior
2026-05-19  6:58 ` [syzbot ci] Re: Introduce Per-CPU Work helpers (was QPW) syzbot ci
2026-05-20 13:09 ` [PATCH v4 0/4] " Sebastian Andrzej Siewior

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