The new "hdrtest" code is for the Intel Xe kernel driver. It aims to help ensure the Direct Rendering Manager header files are self-contained and pass kernel-doc tests — basic maintenance checks on the included DRM header files to verify they are all in good shape.

In a post entitled Grrrr Torvalds accused the code of not only slowing down the full-kernel builds but also leaving behind "random" files for dependencies "that then make the source tree nasty"

"I did the pull and resolved the (trivial) conflicts, but I noticed that this ended up containing the disgusting 'hdrtest' crap that (a) slows down the build because it's done for a regular allmodconfig build rather than be some simple thing that you guys can run as needed (b) also leaves random 'hdrtest' turds around in the include directories," he wrote.

Torvalds marked hdrtest as broken to halt its spread through build processes, demanding a cleanup from the Chipzilla contributors before it can re-enter the Linux sanctum.

The rest of the DRM-Next code is in, according to Phoronix, but the message from Torvalds is loud and clear: no more code turds.