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Date: Sat, 12 Jun 2021 05:36:31 -0700
From: Yury Norov <yury.norov@...il.com>
To: linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
Benjamin Herrenschmidt <benh@...nel.crashing.org>,
Catalin Marinas <catalin.marinas@....com>,
Will Deacon <will@...nel.org>,
Yoshinori Sato <ysato@...rs.sourceforge.jp>,
Brian Cain <bcain@...eaurora.org>,
Geert Uytterhoeven <geert@...ux-m68k.org>,
Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
Jonas Bonn <jonas@...thpole.se>,
Stefan Kristiansson <stefan.kristiansson@...nalahti.fi>,
"James E.J. Bottomley" <James.Bottomley@...senPartnership.com>,
Palmer Dabbelt <palmer@...belt.com>,
Heiko Carstens <hca@...ux.ibm.com>,
Rich Felker <dalias@...c.org>,
David Hildenbrand <david@...hat.com>,
Jaegeuk Kim <jaegeuk@...nel.org>,
Arnd Bergmann <arnd@...db.de>,
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
Rasmus Villemoes <linux@...musvillemoes.dk>,
Andrew Morton <akpm@...ux-foundation.org>,
Alexander Lobakin <alobakin@...me>,
Samuel Mendoza-Jonas <sam@...dozajonas.com>,
Jakub Kicinski <kuba@...nel.org>,
Daniel Bristot de Oliveira <bristot@...hat.com>,
Alexey Klimov <aklimov@...hat.com>,
Ingo Molnar <mingo@...hat.com>
Cc: Yury Norov <yury.norov@...il.com>
Subject: [PATCH 0/8] all: use find_next_*_bit() instead of find_first_*_bit() where possible
find_first_*_bit() is simpler and faster than 'next' version [1], and they
work identically if start == 0. But in many cases kernel code uses the
'next' version where 'first' can be used. This series addresses this issue.
Patches 1-3 move find.h under include/linux as it simplifies development.
Patches 4-8 switch the kernel and tools to find_first_*_bit() implementation
where appropriate.
Yury Norov (8):
bitops: protect find_first_{,zero}_bit properly
bitops: move find_bit_*_le functions from le.h to find.h
include: move find.h from asm_generic to linux
arch: remove GENERIC_FIND_FIRST_BIT entirely
lib: add find_first_and_bit()
cpumask: use find_first_and_bit()
all: replace find_next{,_zero}_bit with find_first{,_zero}_bit where
appropriate
tools: sync tools/bitmap with mother linux
MAINTAINERS | 4 +-
arch/alpha/include/asm/bitops.h | 2 -
arch/arc/Kconfig | 1 -
arch/arc/include/asm/bitops.h | 1 -
arch/arm/include/asm/bitops.h | 1 -
arch/arm64/Kconfig | 1 -
arch/arm64/include/asm/bitops.h | 1 -
arch/csky/include/asm/bitops.h | 1 -
arch/h8300/include/asm/bitops.h | 1 -
arch/hexagon/include/asm/bitops.h | 1 -
arch/ia64/include/asm/bitops.h | 2 -
arch/m68k/include/asm/bitops.h | 2 -
arch/mips/Kconfig | 1 -
arch/mips/include/asm/bitops.h | 1 -
arch/openrisc/include/asm/bitops.h | 1 -
arch/parisc/include/asm/bitops.h | 2 -
arch/powerpc/include/asm/bitops.h | 2 -
arch/powerpc/platforms/pasemi/dma_lib.c | 4 +-
arch/riscv/include/asm/bitops.h | 1 -
arch/s390/Kconfig | 1 -
arch/s390/include/asm/bitops.h | 1 -
arch/s390/kvm/kvm-s390.c | 2 +-
arch/sh/include/asm/bitops.h | 1 -
arch/sparc/include/asm/bitops_32.h | 1 -
arch/sparc/include/asm/bitops_64.h | 2 -
arch/x86/Kconfig | 1 -
arch/x86/include/asm/bitops.h | 2 -
arch/x86/um/Kconfig | 1 -
arch/xtensa/include/asm/bitops.h | 1 -
drivers/block/rnbd/rnbd-clt.c | 2 +-
drivers/dma/ti/edma.c | 2 +-
drivers/iio/adc/ad7124.c | 2 +-
drivers/infiniband/hw/irdma/hw.c | 16 +-
drivers/media/cec/core/cec-core.c | 2 +-
drivers/media/mc/mc-devnode.c | 2 +-
drivers/pci/controller/dwc/pci-dra7xx.c | 2 +-
drivers/scsi/lpfc/lpfc_sli.c | 10 +-
drivers/soc/ti/k3-ringacc.c | 4 +-
drivers/tty/n_tty.c | 2 +-
drivers/virt/acrn/ioreq.c | 3 +-
fs/f2fs/segment.c | 8 +-
fs/ocfs2/cluster/heartbeat.c | 2 +-
fs/ocfs2/dlm/dlmdomain.c | 4 +-
fs/ocfs2/dlm/dlmmaster.c | 18 +--
fs/ocfs2/dlm/dlmrecovery.c | 2 +-
fs/ocfs2/dlm/dlmthread.c | 2 +-
include/asm-generic/bitops.h | 1 -
include/asm-generic/bitops/le.h | 64 --------
include/linux/bitmap.h | 1 +
include/linux/cpumask.h | 30 ++--
.../bitops => include/linux}/find.h | 149 +++++++++++++++++-
lib/Kconfig | 3 -
lib/find_bit.c | 21 +++
lib/find_bit_benchmark.c | 21 +++
lib/genalloc.c | 2 +-
net/ncsi/ncsi-manage.c | 4 +-
tools/include/asm-generic/bitops.h | 1 -
tools/include/linux/bitmap.h | 7 +-
.../bitops => tools/include/linux}/find.h | 54 +++++--
tools/lib/find_bit.c | 20 +++
60 files changed, 319 insertions(+), 185 deletions(-)
rename {tools/include/asm-generic/bitops => include/linux}/find.h (50%)
rename {include/asm-generic/bitops => tools/include/linux}/find.h (83%)
--
2.30.2
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