From: Michael Jeanson <mjeanson@efficios.com>
Date: Tue, 11 Feb 2020 19:51:01 +0000 (-0500)
Subject: fix: rcu: Fix data-race due to atomic_t copy-by-value (v5.6)
X-Git-Tag: v2.11.2~5
X-Git-Url: http://git.liburcu.org/?a=commitdiff_plain;h=2c4fc808098849a343f24f35c8444d92956d1a8f;hp=2c4fc808098849a343f24f35c8444d92956d1a8f;p=lttng-modules.git

fix: rcu: Fix data-race due to atomic_t copy-by-value (v5.6)

See upstream commit :

  commit 6cf539a87a61a4fbc43f625267dbcbcf283872ed
  Author: Marco Elver <elver@google.com>
  Date:   Wed Oct 9 17:57:43 2019 +0200

    rcu: Fix data-race due to atomic_t copy-by-value

    This fixes a data-race where `atomic_t dynticks` is copied by value. The
    copy is performed non-atomically, resulting in a data-race if `dynticks`
    is updated concurrently.

Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
---