Re: [PATCH 08/17] all: replace bitmap_weight with bitmap_weight_{eq,gt,ge,lt,le} where appropriate
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: 2021-12-20 16:41:10
Also in:
kvm, linux-alpha, linux-crypto, linux-mips, linux-mm, linux-perf-users, linux-riscv, linux-s390, lkml
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