osd/PGBackend: take const where we can

Signed-off-by: Sage Weil <sage@redhat.com>

diff --git a/src/osd/PGBackend.h b/src/osd/PGBackend.h
index 5de2cf1e04a8fefc4346f544663e548b9f0f1a54..79989d00f372dc02fdfe727333c9c45ff72c3027 100644 (file)
--- a/src/osd/PGBackend.h
+++ b/src/osd/PGBackend.h
@@ -185,7 +185,7 @@ typedef ceph::shared_ptr<const OSDMap> OSDMapRef;
 
      virtual ObjectContextRef get_obc(
        const hobject_t &hoid,
-       map<string, bufferlist> &attrs) = 0;
+       const map<string, bufferlist> &attrs) = 0;
 
      virtual bool try_lock_for_read(
        const hobject_t &hoid,
@@ -202,7 +202,7 @@ typedef ceph::shared_ptr<const OSDMap> OSDMapRef;
 
      virtual void log_operation(
        const vector<pg_log_entry_t> &logv,
-       boost::optional<pg_hit_set_history_t> &hset_history,
+       const boost::optional<pg_hit_set_history_t> &hset_history,
        const eversion_t &trim_to,
        const eversion_t &roll_forward_to,
        bool transaction_applied,