CONFIG_ACPI_SLEEP. Not trivial for a user to select it
when it doesn't even appear on the menu. It doesn't appear
because CONFIG_SUSPEND_SMP isn't enabled, but that doesn't
appear either -- because CONFIG_HOTPLUG_CPU isn't selected.
so have something like
config ACPI_SLEEP
select HOTPLUG_CPU if X86 && SMP
select SUSPEND_SMP if X86 && SMP
instead of makeing it dependant on ACPI.
If more config options where better, then this
would indeed be an improvement over 2.6.22.
But more config options isn't better -- except for "some people":-)