From: Kefu Chai <kchai@redhat.com>
Date: Mon, 21 Dec 2020 04:34:37 +0000 (+0800)
Subject: include/interval_set: use map::rbegin() for accessing the last element
X-Git-Tag: v16.1.0~146^2
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=a45237c12b758dc66180ff23ebd6c90ac2541f0e;p=ceph.git

include/interval_set: use map::rbegin() for accessing the last element

better than

p = end();
p--;

more concise this way.

Signed-off-by: Kefu Chai <kchai@redhat.com>
---

diff --git a/src/include/interval_set.h b/src/include/interval_set.h
index 2b6ba05d709..3ade9acae11 100644
--- a/src/include/interval_set.h
+++ b/src/include/interval_set.h
@@ -430,9 +430,8 @@ class interval_set {
   }
   offset_type range_end() const {
     ceph_assert(!empty());
-    auto p = m.end();
-    p--;
-    return p->first+p->second;
+    auto p = m.rbegin();
+    return p->first + p->second;
   }
 
   // interval start after p (where p not in set)