Will Linux 4.5 Bring Any Performance Boost For Pre-AMDGPU Radeon?

While I've been writing a lot the past few days about the AMDGPU kernel driver given it's landing PowerPlay support for Linux 4.5, I took some time today for running some Radeon (non-AMDGPU) DRM tests to see if the performance of this DRM-next code has changed compared to Linux 4.4 near-final.

I just ran some tests on a Radeon R9 290 and R7 370 for now with the Radeon DRM driver from Linux 4.4 Git and then my latest Radeon DRM-Next kernel spin for the code that's going to land during the Linux 4.5 kernel merge window. Mesa 11.2-devel + LLVM 3.8 SVN was maintained during testing as were other system settings.

For the most part, no big performance changes:

But BioShock Infinite and Xonotic looks like they were trying to push harder on the newer kernel graphics driver code:
All of these quick Linux 4.4 vs. 4.5 Radeon DRM reference tests can be found via this OpenBenchmarking.org result file.