From: xie xingguo <xie.xingguo@zte.com.cn>
Date: Wed, 18 May 2016 01:57:30 +0000 (+0800)
Subject: os/bluestore/BitAllocator: fix race condition for check_bit()
X-Git-Tag: v11.0.0~367^2~1
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=775307c613e41ce0bf205f487f0bc33c0bc32b98;p=ceph.git

os/bluestore/BitAllocator: fix race condition for check_bit()

Signed-off-by: xie xingguo <xie.xingguo@zte.com.cn>
---

diff --git a/src/os/bluestore/BitAllocator.cc b/src/os/bluestore/BitAllocator.cc
index f72131d83e47..4d419d4f1947 100644
--- a/src/os/bluestore/BitAllocator.cc
+++ b/src/os/bluestore/BitAllocator.cc
@@ -128,7 +128,7 @@ bmap_t BmapEntry::bit_mask(int bit)
 }
 bool BmapEntry::check_bit(int bit)
 {
-  return (m_bits & bit_mask(bit));
+  return (atomic_fetch() & bit_mask(bit));
 }
 
 bmap_t BmapEntry::atomic_fetch()