linux-kernel - [PATCH v2] locking/qspinlock: Fix inaccessible URL of MCS lock paper

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Date:   Tue,  7 Jan 2020 10:16:19 -0500
From:   Waiman Long <longman@...hat.com>
To:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Will Deacon <will.deacon@....com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Borislav Petkov <bp@...en8.de>
Cc:     linux-kernel@...r.kernel.org,
        Konstantin Ryabitsev <konstantin@...uxfoundation.org>,
        Waiman Long <longman@...hat.com>
Subject: [PATCH v2] locking/qspinlock: Fix inaccessible URL of MCS lock paper

It turns out that the URL of the MCS lock paper listed in the source
code is no longer accessible. I did got question about where the paper
was. This patch updates the URL to BZ 206115 which contains a copy of
the paper from

  https://www.cs.rochester.edu/u/scott/papers/1991_TOCS_synch.pdf

Signed-off-by: Waiman Long <longman@...hat.com>
---
 kernel/locking/qspinlock.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/kernel/locking/qspinlock.c b/kernel/locking/qspinlock.c
index 2473f10c6956..ce75b2270b58 100644
--- a/kernel/locking/qspinlock.c
+++ b/kernel/locking/qspinlock.c
@@ -31,10 +31,9 @@
 /*
  * The basic principle of a queue-based spinlock can best be understood
  * by studying a classic queue-based spinlock implementation called the
- * MCS lock. The paper below provides a good description for this kind
- * of lock.
+ * MCS lock. A copy of the original MCS lock papaer is available at
  *
- * http://www.cise.ufl.edu/tr/DOC/REP-1992-71.pdf
+ * https://bugzilla.kernel.org/show_bug.cgi?id=206115
  *
  * This queued spinlock implementation is based on the MCS lock, however to make
  * it fit the 4 bytes we assume spinlock_t to be, and preserve its existing
-- 
2.18.1