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Message-Id: <20171214152344.6880-1-hch@lst.de>
Date: Thu, 14 Dec 2017 16:23:41 +0100
From: Christoph Hellwig <hch@....de>
To: Ingo Molnar <mingo@...hat.com>,
Peter Zijlstra <peterz@...radead.org>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
Al Viro <viro@...iv.linux.org.uk>,
Andrea Arcangeli <aarcange@...hat.com>,
Mike Rapoport <rppt@...ux.vnet.ibm.com>,
Jason Baron <jbaron@...mai.com>, linux-fsdevel@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: waitqueue lockdep annotation V3
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.
Changes since V2:
- various typo fixes
- updated comments in epoll to always refer to ep->wq.lock
- add the new userfaultd patch from Matthew
Changes since V1:
- remove eq->lock in epoll
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