On Sat, Nov 27, 2021 at 07:56:58PM -0800, Yury Norov wrote:

bitmap_weight() counts all set bits in the bitmap unconditionally.
However in some cases we can traverse a part of bitmap when we
only need to check if number of set bits is greater, less or equal
to some number.

This patch replaces bitmap_weight() with one of
bitmap_{empty,full,eq,gt,le), as appropriate.

In some places driver code has been optimized further, where it's
trivial.

Signed-off-by: Yury Norov <yury.norov@gmail.com>
---
 arch/nds32/kernel/perf_event_cpu.c                 |  4 +---
 arch/x86/kernel/cpu/resctrl/rdtgroup.c             |  4 ++--
 arch/x86/kvm/hyperv.c                              |  8 ++++----
 drivers/crypto/ccp/ccp-dev-v5.c                    |  5 +----
 drivers/gpu/drm/msm/disp/mdp5/mdp5_smp.c           |  2 +-
 drivers/iio/adc/mxs-lradc-adc.c                    |  3 +--
 drivers/iio/dummy/iio_simple_dummy_buffer.c        |  4 ++--
 drivers/iio/industrialio-buffer.c                  |  2 +-
 drivers/iio/industrialio-trigger.c                 |  2 +-
 drivers/memstick/core/ms_block.c                   |  4 ++--
 drivers/net/dsa/b53/b53_common.c                   |  2 +-
 drivers/net/ethernet/broadcom/bcmsysport.c         |  6 +-----
 drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c   |  4 ++--
 drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c     |  2 +-
 .../ethernet/marvell/octeontx2/nic/otx2_ethtool.c  |  2 +-
 .../ethernet/marvell/octeontx2/nic/otx2_flows.c    |  8 ++++----
 .../net/ethernet/marvell/octeontx2/nic/otx2_pf.c   |  2 +-
 drivers/net/ethernet/mellanox/mlx4/cmd.c           | 10 +++-------
 drivers/net/ethernet/mellanox/mlx4/eq.c            |  4 ++--
 drivers/net/ethernet/mellanox/mlx4/main.c          |  2 +-
 .../net/ethernet/mellanox/mlx5/core/en_ethtool.c   |  2 +-
 drivers/net/ethernet/qlogic/qed/qed_dev.c          |  3 +--
 drivers/net/ethernet/qlogic/qed/qed_rdma.c         |  4 ++--
 drivers/net/ethernet/qlogic/qed/qed_roce.c         |  2 +-
 drivers/perf/arm-cci.c                             |  2 +-
 drivers/perf/arm_pmu.c                             |  4 ++--
 drivers/perf/hisilicon/hisi_uncore_pmu.c           |  2 +-
 drivers/perf/thunderx2_pmu.c                       |  3 +--
 drivers/perf/xgene_pmu.c                           |  2 +-
 drivers/pwm/pwm-pca9685.c                          |  2 +-
 drivers/staging/media/tegra-video/vi.c             |  2 +-
 drivers/thermal/intel/intel_powerclamp.c           | 10 ++++------
 fs/ocfs2/cluster/heartbeat.c                       | 14 +++++++-------
 33 files changed, 57 insertions(+), 75 deletions(-)

After you get the new functions added to the kernel tree, this patch
should be broken up into one-patch-per-subsystem and submitted through
the various subsystem trees.

thanks,

greg k-h