| From | paulmck@kernel ... | Subject | [PATCH tip/core/rcu 03/10] rculist: Add ASSERT_EXCLUSIVE_ACCESS() to __list_splice_init_rcu() | Date | Mon, 22 Jun 2020 17:43:26 -0700 |
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From: "Paul E. McKenney" <paulmck@kernel.org>
After the sync() in __list_splice_init_rcu(), there should be no readers traversing the old list. This commit therefore enlists the help of KCSAN to verify this condition via a pair of calls to ASSERT_EXCLUSIVE_ACCESS().
Signed-off-by: Paul E. McKenney <paulmck@kernel.org> Cc: Marco Elver <elver@google.com> --- include/linux/rculist.h | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/include/linux/rculist.h b/include/linux/rculist.h index df587d1..2ebd112 100644 --- a/include/linux/rculist.h +++ b/include/linux/rculist.h @@ -248,6 +248,8 @@ static inline void __list_splice_init_rcu(struct list_head *list, */ sync(); + ASSERT_EXCLUSIVE_ACCESS(*first); + ASSERT_EXCLUSIVE_ACCESS(*last); /* * Readers are finished with the source list, so perform splice. -- 2.9.5
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