Comment 3 for bug 849130

I browsed through the 1000+ upstream i915 commits in the changelog since the LRU backport patches for anything that looked tangentially related to these patches, and then I reviewed the identified changesets more closely to see if any were bugfixes related to the patches reverted here. It looks like all bugfixes had been applied to master-next prior to reverting the patches, so if all the same patches are reapplied then all known regressions related to these patches should be fixed.