As promised, here are a few patches which allow to override the _REV (supported ACPI revision) setting of the ACPI implementation. With this patch in place (and possibly with other quirks added to drivers/acpi/osl.c -- Matthew mentioned the Inspiron 7437), the patch b1ef29725865 can be applied again (or the revert of b1ef29725865 be reverted).
Also throw in a re-ordering of the kernel-parameters Documentation.
Dominik Brodowski (4): acpi: use same type for acpi_predefined_names values as in definition acpi: allow for an override to set _REV acpi: add _REV quirk for Dell XPS 13 (2015) acpi: fix kernel-parameters ordering in Documentation
Documentation/kernel-parameters.txt | 76 ++++++++++++++++++++++--------------- drivers/acpi/Kconfig | 15 ++++++++ drivers/acpi/bus.c | 2 + drivers/acpi/internal.h | 1 + drivers/acpi/osl.c | 60 ++++++++++++++++++++++++++++- include/acpi/acpiosxf.h | 2 +- 6 files changed, 123 insertions(+), 33 deletions(-)