On Mon, 2021-09-13 at 22:33 +0000, Sasha Levin wrote: > From: Johannes Berg <johannes.berg@xxxxxxxxx> > > [ Upstream commit b2296eeac91555bd13f774efa7ab7d4b12fb71ef ] While this commit (and also "dmaengine: ioat: depends on !UML") isn't *wrong* per se on old kernels, the subject matter is really only relevant since commit 68f5d3f3b654 ("um: add PCI over virtio emulation driver"), since previously "UML && PCI" could not be true. Hence, there's no point applying this (and the ioat one) to anything older than 5.14. johannes