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authorSeongJae Park <sj@kernel.org>2023-06-16 23:36:26 +0000
committerPaul E. McKenney <paulmck@kernel.org>2023-07-14 14:55:57 -0700
commit47d63d7a3918d8bc1ccd0b0527da8dbb66429100 (patch)
treefd7e4ec565efea78fb8212752a5ed5168b85af72 /Documentation/RCU
parentd186204a98541c7d693290bfc91853bbfdfcf0cb (diff)
Docs/RCU/rculist_nulls: Fix text about atomic_set_release()
The document says we can avoid extra _release() in insert function when hlist_nulls is used, but that's not true[1]. Drop it. [1] https://lore.kernel.org/rcu/46440869-644a-4982-b790-b71b43976c66@paulmck-laptop/ Signed-off-by: SeongJae Park <sj@kernel.org> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'Documentation/RCU')
-rw-r--r--Documentation/RCU/rculist_nulls.rst6
1 files changed, 4 insertions, 2 deletions
diff --git a/Documentation/RCU/rculist_nulls.rst b/Documentation/RCU/rculist_nulls.rst
index 1fb086066377..21e40fcc08de 100644
--- a/Documentation/RCU/rculist_nulls.rst
+++ b/Documentation/RCU/rculist_nulls.rst
@@ -140,8 +140,7 @@ very very fast (before the end of RCU grace period)
Avoiding extra smp_rmb()
========================
-With hlist_nulls we can avoid extra smp_rmb() in lockless_lookup()
-and extra _release() in insert function.
+With hlist_nulls we can avoid extra smp_rmb() in lockless_lookup().
For example, if we choose to store the slot number as the 'nulls'
end-of-list marker for each slot of the hash table, we can detect
@@ -196,6 +195,9 @@ Note that using hlist_nulls means the type of 'obj_node' field of
2) Insert algorithm
-------------------
+Same to the above one, but uses hlist_nulls_add_head_rcu() instead of
+hlist_add_head_rcu().
+
::
/*