From 913dc33fb2720fb5f979011664294137ddd8b13b Mon Sep 17 00:00:00 2001
From: Slava Pestov <sp@daterainc.com>
Date: Fri, 23 May 2014 11:18:35 -0700
Subject: bcache: fix crash in bcache_btree_node_alloc_fail tracepoint

'b' was NULL.

Change-Id: Icac0fd04afa2d23f213d96d51afd53374e6dd0c0

diff --git a/drivers/md/bcache/btree.c b/drivers/md/bcache/btree.c
index 39c7f5b..f823785 100644
--- a/drivers/md/bcache/btree.c
+++ b/drivers/md/bcache/btree.c
@@ -1096,7 +1096,7 @@ err_free:
 err:
 	mutex_unlock(&c->bucket_lock);
 
-	trace_bcache_btree_node_alloc_fail(b);
+	trace_bcache_btree_node_alloc_fail(c);
 	return b;
 }
 
diff --git a/include/trace/events/bcache.h b/include/trace/events/bcache.h
index 6778e41..981acf7 100644
--- a/include/trace/events/bcache.h
+++ b/include/trace/events/bcache.h
@@ -261,9 +261,9 @@ DEFINE_EVENT(btree_node, bcache_btree_node_alloc,
 	TP_ARGS(b)
 );
 
-DEFINE_EVENT(btree_node, bcache_btree_node_alloc_fail,
-	TP_PROTO(struct btree *b),
-	TP_ARGS(b)
+DEFINE_EVENT(cache_set, bcache_btree_node_alloc_fail,
+	TP_PROTO(struct cache_set *c),
+	TP_ARGS(c)
 );
 
 DEFINE_EVENT(btree_node, bcache_btree_node_free,
-- 
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