linux-kernel - [git pull] fix for nasty races in br_write

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Message-ID: <20111222070912.GL23916@ZenIV.linux.org.uk>
Date:	Thu, 22 Dec 2011 07:09:12 +0000
From:	Al Viro <viro@...IV.linux.org.uk>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: [git pull] fix for nasty races in br_write_lock()

	There's a nasty race between CPU hotplug and br_write_lock();
the latter pretty much assumes that the set of online CPUs can't change
between br_write_lock() and br_write_unlock().  Caught by Cong Meng,
solution hashed out during the last few days between me and Srivatsa S. Bhat
on l-k/fsdevel thread, appears to fix the problem in a reasonably sane
way.  It'll need to go into -stable as well; all branches since 2.6.36.
Please, pull from the usual place;
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git for-linus

Shortlog:
Srivatsa S. Bhat (1):
      VFS: Fix race between CPU hotplug and lglocks

Diffstat:
 include/linux/lglock.h |   36 ++++++++++++++++++++++++++++++++----
 1 files changed, 32 insertions(+), 4 deletions(-)
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