Re: [PATCH 08/17] all: replace bitmap_weight with bitmap_weight_{eq,gt,ge,lt,le} where appropriate

Greg Kroah-Hartman
2021-12-20T16:41:15Z

On Sat, Dec 18, 2021 at 01:20:04PM -0800, Yury Norov wrote:
> Kernel code calls bitmap_weight() to compare the weight of bitmap with
> a given number. We can do it more efficiently with bitmap_weight_{eq, ...}
> because conditional bitmap_weight may stop traversing the bitmap earlier,
> as soon as condition is met.
>
> This patch replaces bitmap_weight with conditional versions where possible,
> except for small bitmaps which size is not configurable and known at
> constant time. In that case conditional version of bitmap_weight would not
> benefit due to small_const_nbits() optimization; but readability may
> suffer.
>
> Signed-off-by: Yury Norov <yury.norov@gmail.com>
> ---
> arch/x86/kernel/cpu/resctrl/rdtgroup.c | 2 +-
> drivers/iio/dummy/iio_simple_dummy_buffer.c | 4 ++--
> drivers/iio/industrialio-trigger.c | 2 +-
> drivers/memstick/core/ms_block.c | 4 ++--
> drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c | 2 +-
> .../net/ethernet/marvell/octeontx2/nic/otx2_ethtool.c | 2 +-
> .../net/ethernet/marvell/octeontx2/nic/otx2_flows.c | 4 ++--
> drivers/net/ethernet/mellanox/mlx4/cmd.c | 10 +++-------
> drivers/net/ethernet/mellanox/mlx4/eq.c | 4 ++--
> drivers/net/ethernet/mellanox/mlx4/fw.c | 4 ++--
> drivers/net/ethernet/mellanox/mlx4/main.c | 2 +-
> drivers/perf/thunderx2_pmu.c | 4 ++--
> drivers/staging/media/tegra-video/vi.c | 2 +-
> 13 files changed, 21 insertions(+), 25 deletions(-)

"all" is not how to submit changes to the kernel. Please break them up
into subsystem-specific patches, and send them after your core changes
are accepted.

good luck!

greg k-h