In a few places bitmap API is called with such a combination of
parameters that makes the call unneeded, or there's a trivial cheaper
alternative.

For example, cpumask_copy(dst, src) where dst == src is simply a no-op.
This series addresses such cases spotted on x86_64 with LTP.

All the patches are independent and may be applied separately in
corresponding subsystems. Or I can take them in bitmap branch, if it's
more convenient.

Yury Norov (6):
  smp: optimize smp_call_function_many_cond()
  sched/topology: optimize topology_span_sane()
  driver core: cpu: optimize print_cpus_isolated()
  genirq: optimze irq_do_set_affinity()
  cgroup/cpuset: optimize cpuset_mems_allowed_intersects()
  tick/common: optimize cpumask_equal() usage

 drivers/base/cpu.c        |  6 ++++--
 kernel/cgroup/cpuset.c    |  3 +++
 kernel/irq/manage.c       |  3 ++-
 kernel/sched/topology.c   |  2 +-
 kernel/smp.c              |  5 ++++-
 kernel/time/tick-common.c | 15 +++++++++++----
 6 files changed, 25 insertions(+), 9 deletions(-)

-- 
2.40.1