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rculist: Add ASSERT_EXCLUSIVE_ACCESS() to __list_splice_init_rcu()
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>
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@ -248,6 +248,8 @@ static inline void __list_splice_init_rcu(struct list_head *list,
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*/
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sync();
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ASSERT_EXCLUSIVE_ACCESS(*first);
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ASSERT_EXCLUSIVE_ACCESS(*last);
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/*
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* Readers are finished with the source list, so perform splice.
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