linux-kernel - Re: [PATCH v2 2/5] binder: use wake_up

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Message-ID: <Ya+x+p3YR1PtbD7O@sol.localdomain>
Date:   Tue, 7 Dec 2021 11:11:54 -0800
From:   Eric Biggers <ebiggers@...nel.org>
To:     Alexander Viro <viro@...iv.linux.org.uk>,
        Benjamin LaHaise <bcrl@...ck.org>
Cc:     linux-aio@...ck.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, Ramji Jiyani <ramjiyani@...gle.com>,
        Christoph Hellwig <hch@....de>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Oleg Nesterov <oleg@...hat.com>, Jens Axboe <axboe@...nel.dk>,
        Martijn Coenen <maco@...roid.com>, stable@...r.kernel.org
Subject: Re: [PATCH v2 2/5] binder: use wake_up_pollfree()

On Tue, Dec 07, 2021 at 01:57:23AM -0800, Eric Biggers wrote:
> From: Eric Biggers <ebiggers@...gle.com>
> 
> wake_up_poll() uses nr_exclusive=1, so it's not guaranteed to wake up
> all non-exclusive waiters.  Yet, POLLFREE *must* wake up all waiters.

This is supposed to say "all exclusive waiters".  Same in patch 3.

- Eric