osd: PrimaryLogPG::do_osd_ops() uses md_config_cacher_t.

Signed-off-by: Radoslaw Zarzynski <rzarzyns@redhat.com>

src/osd/PrimaryLogPG.cc

@@ -25,6 +25,7 @@
 #include "Session.h"
 #include "objclass/objclass.h"
 
+#include "common/config_cacher.h"
 #include "common/errno.h"
 #include "common/scrub_types.h"
 #include "common/perf_counters.h"
@@ -5493,9 +5494,12 @@ int PrimaryLogPG::do_osd_ops(OpContext *ctx, vector<OSDOp>& ops)
   ObjectState& obs = ctx->new_obs;
   object_info_t& oi = obs.oi;
   const hobject_t& soid = oi.soid;
-  bool skip_data_digest = osd->store->has_builtin_csum() &&
-    cct->_conf->osd_skip_data_digest;
-  const uint64_t osd_max_object_size = cct->_conf->osd_max_object_size;
+  const static md_config_cacher_t<uint64_t> osd_max_object_size(
+    *g_conf, "osd_max_object_size");
+  const static md_config_cacher_t<bool> conf_data_digest(
+    *g_conf, "osd_skip_data_digest");
+  const bool skip_data_digest = osd->store->has_builtin_csum() &&
+    conf_data_digest;
 
   PGTransaction* t = ctx->op_t.get();