Commits on Apr 28, 2022

1. maps: Handle GetValueAndDeleteBatch return code appropiately …

   Long story short, some libbpf APIs that don't return pointers, such as the
   batch APIs might return `-1` when there's a 'partial success'. In the case
   of these APIs, with errno=ENOENT, we know that we read and deleted less than
   `count` entries, but it was still overall sucessful. For more  more background
   see the inline comments.
   
   This PR fixes this for `GetValueAndDeleteBatch` only. We aren't addressing
   all the other batch calls yet as we haven't used them
   yet.
   
   Thanks!

   

   javierhonduco committed Apr 28, 2022
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