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Date:   Wed,  6 Dec 2017 15:52:28 -0800
From:   Christoph Hellwig <>
To:     Ingo Molnar <>,
        Peter Zijlstra <>
Cc:     Andrew Morton <>,
        Al Viro <>,
        Jason Baron <>,,
Subject: waitqueue lockdep annotation

Hi all,

this series adds a strategic lockdep_assert_held to __wake_up_common
to ensure callers really do hold the wait_queue_head lock when calling
the unlocked wake_up variants.  It turns out epoll did not do this
for a fairly common path (hit all the time by systemd during bootup),
so the second patch fixed this instance as well.

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