rgw: add comment for bucket in BucketCounter

Signed-off-by: Casey Bodley <cbodley@redhat.com>

diff --git a/src/rgw/rgw_sync_log_trim.cc b/src/rgw/rgw_sync_log_trim.cc
index 171e7c80a0b3d39b0687aba00c4f0464142de71b..d6744ca4a4b9bf7e0fb011736cb91f3b0121bae5 100644 (file)
--- a/src/rgw/rgw_sync_log_trim.cc
+++ b/src/rgw/rgw_sync_log_trim.cc
@@ -61,7 +61,7 @@ struct TrimNotifyHandler {
 struct TrimCounters {
   /// counter for a single bucket
   struct BucketCounter {
-    std::string bucket;
+    std::string bucket; //< bucket instance metadata key
     int count{0};
 
     BucketCounter() = default;