On 02/07/11 04:22, Mark Brown wrote:
> It is very rare to find a current system which is both sufficiently
> resource constrained to want to compile out power management support
> and sufficiently power insensitive to be able to tolerate doing so.
> Since having the configuration option requires non-zero effort to
> maintain, with ifdefery in most drivers, but it is used with vanishing
> rarity it is simpler to just remove the option.
Proof by assertion that it is used with vanishing rarity.
> Begin doing so by hiding it from users - this should attract complaints
> from any active users. The option is left disabled for the IA64 Ski
> simulator which is a partial simulator for IA64 systems mostly missing
> device support. This is a very limited use case which is unlikely to
> ever want to enable most drivers.
That is not a good method of getting feedback from users.
1) It immediately removes the ability to have CONFIG_PM undefined,
without first giving active users a chance to provide feedback.
2) The removal of that ability is not obvious ("make oldconfig" does
not say anything about CONFIG_PM). It is easy to overlook a
config change that happens silently.
3) The active users may not move to a newer version of the kernel
that contains this change until after it has been decided that
there are no users of the config option since no one complained
in a timely manner.
Would it be appropriate to use Documentation/feature-removal-schedule.txt
if this truly will be removed?
-Frank
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