When running in a cgroup which is limited to a subset of cpus (via
cpuset.cpus), cpu_count() should return the number of cpus that can be
used instead of the number of cpus the system has.
This also aligns the semantics with nproc.
(Bitbake rev: a029bfe96c6542f178720c72a772b7ede9898118)
Signed-off-by: Felix Moessbauer <felix.moessbauer@siemens.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>