Documented in 4 files:

• arch/riscv/include/asm/bitops.h, line 95
• arch/s390/include/asm/bitops.h, line 341
• arch/xtensa/include/asm/bitops.h, line 75
• include/asm-generic/bitops/builtin-__fls.h, line 5

Defined in 2 files as a prototype:

• arch/sparc/include/asm/bitops_64.h, line 27 (as a prototype)
• tools/testing/selftests/powerpc/primitives/load_unaligned_zeropad.c, line 24 (as a prototype)

Defined in 2 files as a macro:

• arch/riscv/include/asm/bitops.h, line 101 (as a macro)
• include/asm-generic/bitops/__fls.h, line 45 (as a macro)

Defined in 14 files as a function:

• arch/alpha/include/asm/bitops.h, line 406 (as a function)
• arch/arc/include/asm/bitops.h, line 85 (as a function)
• arch/arc/include/asm/bitops.h, line 134 (as a function)
• arch/csky/include/asm/bitops.h, line 55 (as a function)
• arch/hexagon/include/asm/bitops.h, line 281 (as a function)
• arch/m68k/include/asm/bitops.h, line 549 (as a function)
• arch/mips/include/asm/bitops.h, line 330 (as a function)
• arch/openrisc/include/asm/bitops/__fls.h, line 14 (as a function)
• arch/s390/include/asm/bitops.h, line 347 (as a function)
• arch/sparc/lib/fls64.S, line 14 (as a function)
• arch/x86/include/asm/bitops.h, line 293 (as a function)
• arch/xtensa/include/asm/bitops.h, line 81 (as a function)
• include/asm-generic/bitops/builtin-__fls.h, line 11 (as a function)
• tools/testing/selftests/powerpc/primitives/load_unaligned_zeropad.c, line 30 (as a function)

Referenced in 116 files:

• arch/arm/kernel/hw_breakpoint.c, line 708
• arch/arm/kernel/module.c, line 99
• arch/arm/mach-dove/irq.c, 2 times
• arch/arm/mach-mv78xx0/irq.c, 3 times
• arch/arm/mach-orion5x/irq.c, line 34
• arch/arm/mm/dma-mapping.c, line 899
• arch/arm/mm/pmsa-v7.c, 2 times
• arch/arm64/include/asm/kvm_host.h, line 718
• arch/arm64/kernel/hw_breakpoint.c, line 722
• arch/arm64/kvm/mmu.c, line 1191
• arch/loongarch/kvm/mmu.c, line 367
• arch/mips/kvm/mmu.c, line 420
• arch/mips/lantiq/irq.c, line 301
• arch/powerpc/include/asm/word-at-a-time.h, line 46
• arch/riscv/kvm/mmu.c, line 400
• arch/riscv/kvm/vcpu_pmu.c, line 226
• arch/s390/boot/pgm_check_info.c, line 18
• arch/s390/include/asm/word-at-a-time.h, line 23
• arch/s390/kvm/interrupt.c, line 1760
• arch/s390/lib/find.c, 2 times
• arch/sparc/lib/NG4patch.S, line 61
• arch/sparc/lib/fls64.S, 2 times
• arch/x86/kernel/apic/x2apic_uv_x.c, line 1390
• arch/x86/kernel/cpu/mtrr/cleanup.c, line 252
• arch/x86/kvm/emulate.c, line 529
• arch/x86/kvm/lapic.c, 3 times
• arch/x86/kvm/mmu/mmu.c, line 1388
• drivers/bus/mhi/host/init.c, line 73
• drivers/bus/mhi/host/trace.h, line 163
• drivers/clk/sunxi/clk-usb.c, line 162
• drivers/crypto/inside-secure/safexcel.c, 2 times
• drivers/dma/idma64.c, line 404
• drivers/dma/ti/cppi41.c, line 338
• drivers/edac/amd64_edac.c, line 1695
• drivers/firmware/efi/libstub/gop.c, 2 times
• drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c, line 801
• drivers/gpu/drm/arm/display/komeda/komeda_wb_connector.c, line 178
• drivers/gpu/drm/arm/malidp_planes.c, line 432
• drivers/gpu/drm/i915/gt/intel_sseu.c, line 61
• drivers/gpu/drm/msm/msm_iommu.c, 2 times
• drivers/gpu/drm/ttm/ttm_pool.c, 2 times
• drivers/gpu/drm/xe/xe_mmio.c, 2 times
• drivers/hwmon/pmbus/adm1275.c, 2 times
• drivers/hwmon/tmp401.c, line 436
• drivers/hwmon/tmp464.c, line 287
• drivers/hwmon/w83773g.c, line 168
• drivers/i2c/busses/i2c-nomadik.c, line 1069
• drivers/i2c/busses/i2c-st.c, line 576
• drivers/infiniband/core/verbs.c, line 3025
• drivers/infiniband/hw/mlx5/qp.c, line 1956
• drivers/iommu/amd/iommu.c, line 1543
• drivers/iommu/dma-iommu.c, 2 times
• drivers/iommu/io-pgtable-arm.c, line 747
• drivers/iommu/iommu.c, 2 times
• drivers/irqchip/irq-csky-apb-intc.c, line 141
• drivers/irqchip/irq-goldfish-pic.c, line 43
• drivers/irqchip/irq-idt3243x.c, line 38
• drivers/irqchip/irq-ingenic.c, line 50
• drivers/irqchip/irq-mscc-ocelot.c, line 108
• drivers/irqchip/irq-orion.c, 2 times
• drivers/irqchip/irq-rda-intc.c, line 55
• drivers/md/dm-crypt.c, line 1698
• drivers/md/dm-flakey.c, line 442
• drivers/md/dm-integrity.c, 4 times
• drivers/md/dm-verity-target.c, 2 times
• drivers/media/i2c/ccs/ccs-core.c, 2 times
• drivers/media/i2c/imx334.c, 2 times
• drivers/media/i2c/imx335.c, 2 times
• drivers/media/v4l2-core/v4l2-common.c, 2 times
• drivers/memory/emif.c, 4 times
• drivers/mmc/host/mmci_stm32_sdmmc.c, line 531
• drivers/net/ethernet/freescale/fec_main.c, line 4011
• drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c, line 3317
• drivers/net/ipa/gsi.c, 2 times
• drivers/net/phy/phylink.c, 4 times
• drivers/net/wireless/ath/ath11k/dp_rx.c, line 3631
• drivers/net/wireless/ath/ath12k/dp_rx.c, line 3245
• drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c, line 4869
• drivers/net/wireless/realtek/rtw88/coex.c, line 3688
• drivers/net/wireless/realtek/rtw88/rtw8822c.c, line 3531
• drivers/net/wireless/realtek/rtw89/phy.c, line 502
• drivers/perf/arm-cmn.c, line 1257
• drivers/rapidio/devices/tsi721.h, 4 times
• drivers/soc/ixp4xx/ixp4xx-qmgr.c, 3 times
• drivers/staging/media/ipu3/ipu3-dmamap.c, 2 times
• drivers/usb/host/octeon-hcd.c, 2 times
• drivers/vfio/vfio_iommu_type1.c, line 2905
• fs/bcachefs/btree_locking.h, line 154
• fs/bcachefs/data_update.c, line 467
• fs/bcachefs/eytzinger.h, 7 times
• fs/bcachefs/inode.c, line 55
• include/asm-generic/bitops/fls64.h, line 31
• include/asm-generic/word-at-a-time.h, line 50
• include/linux/find.h, line 384
• include/net/ipv6.h, 2 times
• include/sound/pcm_params.h, line 60
• lib/find_bit.c, line 213
• lib/lz4/lz4defs.h, line 191
• lib/math/int_sqrt.c, line 27
• mm/page_alloc.c, line 891
• net/dsa/user.c, 3 times
• net/ipv4/fib_trie.c, line 1131
• net/sched/sch_qfq.c, 3 times
• security/selinux/ss/ebitmap.c, line 238
• sound/soc/apple/mca.c, line 388
• sound/soc/codecs/pcm186x.c, line 443
• sound/soc/codecs/rt1011.c, line 1949
• sound/soc/codecs/tas2552.c, line 458
• sound/soc/codecs/tas6424.c, line 229
• sound/soc/codecs/tlv320adcx140.c, line 855
• sound/soc/codecs/tlv320aic3x.c, line 1331
• sound/soc/intel/avs/board_selection.c, line 489
• sound/soc/intel/catpt/pcm.c, line 810
• sound/soc/sof/intel/hda-mlink.c, line 818
• tools/include/asm-generic/bitops/fls64.h, line 31
• virt/kvm/dirty_ring.c, line 66