From d3af5f8a50dd75f4d071e00c16d9ac3f0ae3858f Mon Sep 17 00:00:00 2001 From: "Liam R. Howlett" Date: Tue, 11 Apr 2023 11:10:52 -0400 Subject: maple_tree: remove extra smp_wmb() from mas_dead_leaves() commit 8372f4d83f96f35915106093cde4565836587123 upstream. 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. Link: https://lkml.kernel.org/r/20230227173632.3292573-5-surenb@google.com Fixes: 54a611b60590 ("Maple Tree: add new data structure") Cc: stable@vger.kernel.org Signed-off-by: Liam Howlett Signed-off-by: Greg Kroah-Hartman --- lib/maple_tree.c | 1 - 1 file changed, 1 deletion(-) (limited to 'lib/maple_tree.c') diff --git a/lib/maple_tree.c b/lib/maple_tree.c index 7f451e0c6fba..f7c204904b8f 100644 --- a/lib/maple_tree.c +++ b/lib/maple_tree.c @@ -5495,7 +5495,6 @@ 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); } -- cgit v1.2.3