(cc'ing Oleg) On Mon, Dec 05, 2011 at 10:55:51PM +0530, Srivatsa S. Bhat wrote: > I wanted these APIs to be generic, not restricted to work only for userspace > processes. Both freezer_do_not_count() and freezer_count() are effective only > when current->mm is non-NULL (ie., only for userspace ones). > I think I have documented this in the patch which added these things to the > 2 APIs. See commit 6a76b7a in linux-pm/linux-next. I see. Oleg was curious about the ->mm condition too and IIRC there's no reason for that restriction. Maybe removing that in another patch and using the count functions is better? Thanks. -- tejun