Created an attachment (id=2) [details]
Patch to change cpuset_delete() to just return the return code from rmdir()

Currently all calls to cpuset_delete() treat the return value as if it is the
return from rmdir(), when it is actually comparing that with 0 and thus
inverting the return code.

The symptom of this are lots of bogus messages about not being able to delete
unused cpusets which are actually successfully being removed (fortunately
that's the only effect)!

The fix is trivial, just make cpuset_delete() return the value from rmdir()
itself - no other changes are necessary.

NOTE: This is different to how things are done in trunk, there there are lots
of comparisons to 0 for its return value, so problems may still lurk there!