[PATCH 6.2 170/173] maple_tree: remove extra smp_wmb() from mas_dead_leaves()

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

From: "Liam R. Howlett" <Liam.Howlett@Oracle.com>

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 <Liam.Howlett@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 lib/maple_tree.c |    1 -
 1 file changed, 1 deletion(-)

--- a/lib/maple_tree.c
+++ b/lib/maple_tree.c
@@ -5500,7 +5500,6 @@ unsigned char mas_dead_leaves(struct ma_
 			break;
 
 		mte_set_node_dead(entry);
-		smp_wmb(); /* Needed for RCU */
 		node->type = type;
 		rcu_assign_pointer(slots[offset], node);
 	}