On Wednesday 08 January 2014, al.stone@xxxxxxxxxx wrote: > Even though support for X86 in hardware reduced mode is possible, it > is NOT enabled. Extensive effort has gone into the Linux kernel so that > there is a single kernel image than can run on all x86 hardware; the kernel > changes run-time behavior to adapt to the hardware being used. This is not > currently possible with the existing ACPICA infrastructure but only presents > a problem on achitectures supporting both hardware-reduced and legacy modes > of ACPI -- i.e., on x86 only. Not sure about the logic here: While it's certainly possible to build a kernel that runs on all x86 machines, it's also possible to build one that only runs on some of them when some basic options are turned off. I don't see any difference between that and what we have on ARM64 or the multiplatform subset of ARM32. I don't think you need any strict architecture dependency here. If you want to make it harder for users to accidentally turn it on, I'd suggest using config ACPI_REDUCED_HARDWARE_ONLY bool "Hardware-reduced ACPI support only" depends on !X86 || EXPERT Arnd -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html