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Date: Mon, 20 Dec 2021 17:41:02 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: Yury Norov <yury.norov@...il.com>
Cc: linux-kernel@...r.kernel.org,
"James E.J. Bottomley" <jejb@...ux.ibm.com>,
"Martin K. Petersen" <martin.petersen@...cle.com>,
Michał Mirosław <mirq-linux@...e.qmqm.pl>,
"Paul E. McKenney" <paulmck@...nel.org>,
"Rafael J. Wysocki" <rafael@...nel.org>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Alexey Klimov <aklimov@...hat.com>,
Amitkumar Karwar <amitkarwar@...il.com>,
Andi Kleen <ak@...ux.intel.com>, Andrew Lunn <andrew@...n.ch>,
Andrew Morton <akpm@...ux-foundation.org>,
Andy Gross <agross@...nel.org>,
Andy Lutomirski <luto@...nel.org>,
Andy Shevchenko <andy@...radead.org>,
Anup Patel <anup.patel@....com>,
Ard Biesheuvel <ardb@...nel.org>,
Arnaldo Carvalho de Melo <acme@...nel.org>,
Arnd Bergmann <arnd@...db.de>, Borislav Petkov <bp@...en8.de>,
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Subject: Re: [PATCH 08/17] all: replace bitmap_weight with
bitmap_weight_{eq,gt,ge,lt,le} where appropriate
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@...il.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
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