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rcu: Add missing annotation for exit_tasks_rcu_finish()

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Sparse reports a warning at exit_tasks_rcu_finish(void)

|warning: context imbalance in exit_tasks_rcu_finish()
|- wrong count at exit

To fix this, this commit adds a __releases(&tasks_rcu_exit_srcu).
Given that exit_tasks_rcu_finish() does actually call __srcu_read_lock(),
this not only fixes the warning but also improves on the readability of
the code.

Signed-off-by: Jules Irenge <jbi.octave@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Reviewed-by: Joel Fernandes (Google) <joel@joelfernandes.org>
This commit is contained in:
Jules Irenge 2020-01-20 22:41:54 +00:00 committed by Paul E. McKenney
parent e1e9bdc00a
commit 90ba11ba99
1 changed files with 1 additions and 1 deletions
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2
kernel/rcu/update.c
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@ -809,7 +809,7 @@ void exit_tasks_rcu_start(void) __acquires(&tasks_rcu_exit_srcu)
}
/* Do the srcu_read_unlock() for the above synchronize_srcu(). */
void exit_tasks_rcu_finish(void)
void exit_tasks_rcu_finish(void) __releases(&tasks_rcu_exit_srcu)
{
preempt_disable();
__srcu_read_unlock(&tasks_rcu_exit_srcu, current->rcu_tasks_idx);