From 7ccd1d26491fcfcdb0d423f7c14542d2092f62b4 Mon Sep 17 00:00:00 2001
From: Sage Weil <sage@redhat.com>
Date: Thu, 21 Jan 2016 10:58:01 -0500
Subject: [PATCH] os/bluestore/FreelistManager: use btree_map::erase return
 value

The btree_map erase() returns an iterator for the next element.
Perfect!

Reported-by: Igor Fedotov <ifedotov@mirantis.com>
Signed-off-by: Sage Weil <sage@redhat.com>
---
 src/os/bluestore/FreelistManager.cc | 11 +----------
 1 file changed, 1 insertion(+), 10 deletions(-)

diff --git a/src/os/bluestore/FreelistManager.cc b/src/os/bluestore/FreelistManager.cc
index 0a025f56904b2..20480a77958f0 100644
--- a/src/os/bluestore/FreelistManager.cc
+++ b/src/os/bluestore/FreelistManager.cc
@@ -206,16 +206,7 @@ int FreelistManager::release(
       if (map_t_has_stable_iterators) {
 	kv_free.erase(p++);
       } else {
-	uint64_t next = 0;
-	++p;
-	if (p != kv_free.end())
-	  next = p->first;
-	--p;
-	kv_free.erase(p);
-	if (next)
-	  p = kv_free.find(next);
-	else
-	  p = kv_free.end();
+	p = kv_free.erase(p);
       }
     } else if (p->first + p->second > offset) {
       derr << __func__ << " bad release " << offset << "~" << length
-- 
2.39.5