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docs/RCU: Add the missing rcu_read_unlock() 

We should exit the RCU read-side critical section before re-entering.

Signed-off-by: Alan Huang <mmpgouride@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Alan Huang 2023-06-13 00:57:01 +00:00 committed by Paul E. McKenney
parent 401013e2ad
commit bc25e7c359
1 changed files with 3 additions and 1 deletions
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4
Documentation/RCU/rculist_nulls.rst
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@ -29,8 +29,10 @@ algorithms:
rcu_read_lock() rcu_read_lock()
obj = lockless_lookup(key); obj = lockless_lookup(key);
if (obj) { if (obj) {
if (!try_get_ref(obj)) // might fail for free objects if (!try_get_ref(obj)) { // might fail for free objects
rcu_read_unlock();
goto begin; goto begin;
}
/* /*
* Because a writer could delete object, and a writer could * Because a writer could delete object, and a writer could
* reuse these object before the RCU grace period, we * reuse these object before the RCU grace period, we