From: "Ahmed S. Darwish" <a.darwish@linutronix.de>
Date: Thu, 27 Aug 2020 13:40:43 +0200
Subject: rbtree_latch: Use seqcount_latch_t
Patch-mainline: v5.10-rc1
Git-commit: 24bf401cebfd630cc9e2c3746e43945e836626f9
References: bsc#1176564 bsc#1162702

Latch sequence counters have unique read and write APIs, and thus
seqcount_latch_t was recently introduced at seqlock.h.

Use that new data type instead of plain seqcount_t. This adds the
necessary type-safety and ensures that only latching-safe seqcount APIs
are to be used.

Signed-off-by: Ahmed S. Darwish <a.darwish@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20200827114044.11173-8-a.darwish@linutronix.de
Acked-by: Daniel Wagner <dwagner@suse.de>
---
 include/linux/rbtree_latch.h |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/include/linux/rbtree_latch.h
+++ b/include/linux/rbtree_latch.h
@@ -42,8 +42,8 @@ struct latch_tree_node {
 };
 
 struct latch_tree_root {
-	seqcount_t	seq;
-	struct rb_root	tree[2];
+	seqcount_latch_t	seq;
+	struct rb_root		tree[2];
 };
 
 /**
@@ -206,7 +206,7 @@ latch_tree_find(void *key, struct latch_
 	do {
 		seq = raw_read_seqcount_latch(&root->seq);
 		node = __lt_find(key, root, seq & 1, ops->comp);
-	} while (read_seqcount_retry(&root->seq, seq));
+	} while (read_seqcount_latch_retry(&root->seq, seq));
 
 	return node;
 }