Messages in this thread Patch in this message | | | Date | Wed, 15 Feb 2023 21:17:19 -0800 | Subject | [PATCH v3 04/35] maple_tree: remove extra smp_wmb() from mas_dead_leaves() | From | Suren Baghdasaryan <> |
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From: Liam Howlett <Liam.Howlett@oracle.com>
The call to mte_set_dead_node() before the smp_wmb() already calls smp_wmb() so this is not needed. This is an optimization for the RCU mode of the maple tree.
Fixes: 54a611b60590 ("Maple Tree: add new data structure") Signed-off-by: Liam Howlett <Liam.Howlett@oracle.com> Signed-off-by: Suren Baghdasaryan <surenb@google.com> --- lib/maple_tree.c | 1 - 1 file changed, 1 deletion(-)
diff --git a/lib/maple_tree.c b/lib/maple_tree.c index 44d6ce30b28e..3d5ab02f981a 100644 --- a/lib/maple_tree.c +++ b/lib/maple_tree.c @@ -5517,7 +5517,6 @@ unsigned char mas_dead_leaves(struct ma_state *mas, void __rcu **slots, break; mte_set_node_dead(entry); - smp_wmb(); /* Needed for RCU */ node->type = type; rcu_assign_pointer(slots[offset], node); } -- 2.39.1
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