> So you're saying Maximilian didn't actually need to look at the RHEL6
> source at all, because all of the bugfix patches RHEL6's kernel includes
> have already been flagged for backport to upstream stable branches?
Only he can answer, but my hypothesis is that
- he spelunked the RHEL6 changelog to distinguish: 1) features, 2) bugfixes which were in stable, 3) bugfixes which were not in stable because the original author forgot to CC email@example.com.
- he focused on the third group here, which may have included patches from both RH and non-RH authors. RH is _not_ actively hiding their stuff from firstname.lastname@example.org.
- he then used the summary of the patches in the changelog to identify upstream commits
- he backported those
Assuming he selected patches whose backports were relatively easy, no, he didn't need to look at the RHEL6 source at all.
To be fair, he would have probably benefited from the full commit messages; these are part of the patch files so they are also not included in RHEL6.