librbd: drop unused elapsed calc for diff_iterate

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

diff --git a/src/librbd/internal.cc b/src/librbd/internal.cc
index 8cc777b5d0f51f5fdd51f7de199c89c19d6ca8b5..b389d01e8aa6f2faa2910268fd9a768e99d48a2e 100644 (file)
--- a/src/librbd/internal.cc
+++ b/src/librbd/internal.cc
@@ -2338,7 +2338,6 @@ reprotect_and_return_err:
     uint64_t period = ictx->get_stripe_period();
     uint64_t left = mylen;
 
-    start_time = ceph_clock_now(ictx->cct);
     while (left > 0) {
       uint64_t period_off = off - (off % period);
       uint64_t read_len = min(period_off + period - off, left);
@@ -2432,7 +2431,6 @@ reprotect_and_return_err:
       off += read_len;
     }
 
-    elapsed = ceph_clock_now(ictx->cct) - start_time;
     return total_read;
   }