FAILED: patch "[PATCH] maple_tree: remove extra smp_wmb() from mas_dead_leaves()" failed to apply to 6.1-stable tree

The patch below does not apply to the 6.1-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.1.y
git checkout FETCH_HEAD
git cherry-pick -x 8372f4d83f96f35915106093cde4565836587123
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<[email protected]>' --in-reply-to '2023041119-pacemaker-division-7192@gregkh' --subject-prefix 'PATCH 6.1.y' HEAD^..

Possible dependencies:

8372f4d83f96 ("maple_tree: remove extra smp_wmb() from mas_dead_leaves()")

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 8372f4d83f96f35915106093cde4565836587123 Mon Sep 17 00:00:00 2001
From: Liam Howlett <[email protected]>
Date: Mon, 27 Feb 2023 09:36:03 -0800
Subject: [PATCH] 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.

index 946acda29521..96d673e4ba5b 100644
@@ -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);
 	}