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From: Akira Yokosawa <akiyks@gmail.com>
Subject: On recent update in defer/rcuintro
Message-ID: <b9b585b4-5822-9cc3-2662-eece0dfd113c@gmail.com>
Date: Sat, 20 Apr 2019 00:27:23 +0900
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To: "Paul E. McKenney" <paulmck@linux.ibm.com>
Cc: perfbook@vger.kernel.org, Akira Yokosawa <akiyks@gmail.com>
List-ID: <perfbook.vger.kernel.org>

Hi Paul,

You might have already noticed, but your fix of Figure 9.7 has 
made Quick Quiz 9.20 pointless. And there remains another use of
WRITE_ONCE() in Figure 9.8 and its discussion in the text.

        Thanks, Akira