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authorLiam Howlett <Liam.Howlett@oracle.com>2023-02-27 09:36:03 -0800
committerAndrew Morton <akpm@linux-foundation.org>2023-04-05 18:06:21 -0700
commit8372f4d83f96f35915106093cde4565836587123 (patch)
tree7887ffe5a6636506e39df77709988589b94ad112 /lib/maple_tree.c
parent2e5b4921f8efc9e845f4f04741797d16f36847eb (diff)
maple_tree: remove extra smp_wmb() from mas_dead_leaves()
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") Signed-off-by: Liam Howlett <Liam.Howlett@oracle.com> Signed-off-by: Suren Baghdasaryan <surenb@google.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'lib/maple_tree.c')
-rw-r--r--lib/maple_tree.c1
1 files changed, 0 insertions, 1 deletions
diff --git a/lib/maple_tree.c b/lib/maple_tree.c
index 946acda29521..96d673e4ba5b 100644
--- a/lib/maple_tree.c
+++ b/lib/maple_tree.c
@@ -5503,7 +5503,6 @@ 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);
}