From: Matthew Wilcox <willy@infradead.org>
To: "Håkon Bugge" <haakon.bugge@oracle.com>
Cc: Alan Stern <stern@rowland.harvard.edu>,
Andrea Parri <parri.andrea@gmail.com>,
Will Deacon <will@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Boqun Feng <boqun.feng@gmail.com>,
Nicholas Piggin <npiggin@gmail.com>,
David Howells <dhowells@redhat.com>,
Jade Alglave <j.alglave@ucl.ac.uk>,
Luc Maranget <luc.maranget@inria.fr>,
"Paul E. McKenney" <paulmck@kernel.org>,
Akira Yokosawa <akiyks@gmail.com>,
Daniel Lustig <dlustig@nvidia.com>,
Joel Fernandes <joelagnelf@nvidia.com>,
Jonathan Corbet <corbet@lwn.net>,
linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org,
lkmm@lists.linux.dev, linux-doc@vger.kernel.org
Subject: Re: [PATCH 1/1] docs/memory-barriers.txt: Add wait_event_cmd() and wait_event_exclusive_cmd()
Date: Thu, 26 Jun 2025 16:17:09 +0100 [thread overview]
Message-ID: <aF1kdYvCQQdIttoC@casper.infradead.org> (raw)
In-Reply-To: <20250626143707.1533808-1-haakon.bugge@oracle.com>
On Thu, Jun 26, 2025 at 04:37:05PM +0200, Håkon Bugge wrote:
> Add said functions to the documentation and relate them to userspace's
> pthread_cond_wait(). The latter because when searching for
> functionality comparable to pthread_cond_wait(), it is very hard to
> find wait_event_cmd().
Would it not go better in the kernel-doc for wait_event_cmd() in
include/linux/wait.h?
>
> +Note that the wait_event_cmd() and wait_event_exclusive_cmd() are the
> +kernel's polymorphic implementation of userspace's
> +pthread_cond_wait().
Pet peeve: "Note that" adds nothing to this sentence. You can just
write:
The wait_event_cmd() and wait_event_exclusive_cmd() functions are the
kernel's polymorphic implementation of userspace's pthread_cond_wait().
> +Using wait_event_cmd() or wait_event_exclusive_cmd(), cmd1 is
> +typically a lock-release call and cmd2 a lock-acquire call. The
> +locking primitive can be chosen, contrary to pthread_cond_wait(),
> +where the locking type is cast in stone and is a pthread_mutex_t.
> +
>
> MISCELLANEOUS FUNCTIONS
> -----------------------
> --
> 2.43.5
>
>
next prev parent reply other threads:[~2025-06-26 15:17 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-06-26 14:37 [PATCH 1/1] docs/memory-barriers.txt: Add wait_event_cmd() and wait_event_exclusive_cmd() Håkon Bugge
2025-06-26 15:17 ` Matthew Wilcox [this message]
2025-06-26 16:18 ` Haakon Bugge
-- strict thread matches above, loose matches on Subject: below --
2025-06-26 12:30 Håkon Bugge
2025-06-26 14:14 ` Akira Yokosawa
2025-06-26 14:20 ` Haakon Bugge
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