Documented in 3 files:

• arch/riscv/include/asm/bitops.h, line 86
• 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 92 (as a macro)
• include/asm-generic/bitops/__fls.h, line 45 (as a macro)

Defined in 13 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 552 (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/sparc/lib/fls64.S, line 14 (as a function)
• arch/x86/include/asm/bitops.h, line 284 (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 137 files:

• arch/arm/kernel/hw_breakpoint.c, line 709
• arch/arm/kernel/module.c, line 65
• 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 897
• arch/arm/mm/pmsa-v7.c, 2 times
• arch/arm64/include/asm/kvm_host.h, line 977
• arch/arm64/include/asm/runtime-const.h, line 89
• arch/arm64/kernel/hw_breakpoint.c, line 729
• arch/arm64/kvm/mmu.c, line 1331
• arch/loongarch/kvm/mmu.c, line 368
• arch/mips/kvm/mmu.c, line 420
• arch/mips/lantiq/irq.c, line 302
• arch/powerpc/include/asm/word-at-a-time.h, line 46
• arch/riscv/include/asm/runtime-const.h, line 286
• arch/riscv/kvm/mmu.c, line 167
• arch/riscv/kvm/vcpu_pmu.c, line 289
• arch/s390/boot/printk.c, line 59
• arch/s390/include/asm/word-at-a-time.h, line 23
• arch/s390/kvm/interrupt.c, line 1725
• arch/s390/lib/find.c, 2 times
• arch/sparc/lib/NG4patch.S, line 61
• arch/sparc/lib/fls64.S, 2 times
• arch/x86/include/asm/apic.h, line 529
• arch/x86/kernel/apic/x2apic_uv_x.c, line 1390
• arch/x86/kernel/cpu/mtrr/cleanup.c, line 239
• arch/x86/kvm/emulate.c, line 461
• arch/x86/kvm/lapic.c, 2 times
• arch/x86/kvm/mmu/mmu.c, line 1464
• drivers/bus/mhi/host/init.c, line 72
• drivers/bus/mhi/host/trace.h, line 164
• drivers/clk/clk-eyeq.c, line 158
• 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 1703
• 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 182
• drivers/gpu/drm/arm/malidp_planes.c, line 432
• drivers/gpu/drm/i915/gt/intel_sseu.c, line 63
• drivers/gpu/drm/msm/msm_iommu.c, 2 times
• drivers/gpu/drm/ttm/ttm_pool.c, line 780
• drivers/gpu/drm/xe/xe_gt_topology.c, line 116
• drivers/gpu/drm/xe/xe_pci_sriov.c, line 94
• drivers/hwmon/macsmc-hwmon.c, line 241
• drivers/hwmon/pmbus/adm1275.c, 2 times
• drivers/hwmon/tmp401.c, line 425
• drivers/hwmon/tmp464.c, line 279
• drivers/hwmon/w83773g.c, line 168
• drivers/i2c/busses/i2c-nomadik.c, line 1062
• drivers/i2c/busses/i2c-st.c, line 570
• drivers/infiniband/core/iter.c, line 16
• drivers/infiniband/hw/mlx5/qp.c, line 1997
• drivers/iommu/dma-iommu.c, 2 times
• drivers/iommu/io-pgtable-arm-selftests.c, line 136
• drivers/iommu/io-pgtable-arm.c, line 922
• drivers/iommu/iommu.c, 2 times
• drivers/irqchip/irq-csky-apb-intc.c, line 140
• 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 113
• drivers/irqchip/irq-orion.c, 2 times
• drivers/irqchip/irq-rda-intc.c, line 55
• drivers/irqchip/irq-riscv-imsic-state.c, line 599
• drivers/md/dm-crypt.c, line 1655
• drivers/md/dm-flakey.c, line 457
• 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/imx283.c, line 1337
• drivers/media/i2c/imx334.c, 2 times
• drivers/media/i2c/imx335.c, 2 times
• drivers/media/i2c/ov08x40.c, line 2101
• drivers/media/pci/intel/ipu6/ipu6-dma.c, line 72
• drivers/media/v4l2-core/v4l2-common.c, 2 times
• drivers/memory/emif.c, 4 times
• drivers/misc/pci_endpoint_test.c, line 291
• drivers/mmc/host/mmci_stm32_sdmmc.c, line 532
• drivers/net/ethernet/airoha/airoha_eth.c, 2 times
• drivers/net/ethernet/freescale/fec_main.c, line 4927
• drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c, line 4181
• drivers/net/ethernet/ti/am65-cpsw-nuss.c, 2 times
• drivers/net/ipa/gsi.c, 2 times
• drivers/net/phy/phylink.c, 4 times
• drivers/net/wireless/ath/ath11k/dp_rx.c, line 3672
• drivers/net/wireless/ath/ath12k/wifi7/dp_rx.c, line 1218
• drivers/net/wireless/mediatek/mt76/mt7603/main.c, line 530
• drivers/net/wireless/realtek/rtl8xxxu/core.c, line 4767
• drivers/net/wireless/realtek/rtw88/coex.c, line 3714
• drivers/net/wireless/realtek/rtw88/rtw8822c.c, line 3497
• drivers/net/wireless/realtek/rtw89/phy.c, line 568
• drivers/pci/controller/pcie-mediatek-gen3.c, line 1015
• drivers/pci/controller/pcie-mediatek.c, line 1005
• drivers/pci/controller/pcie-rzg3s-host.c, line 1509
• drivers/pci/pcie/bwctrl.c, 2 times
• drivers/pci/rebar.c, line 167
• drivers/rapidio/devices/tsi721.h, 4 times
• drivers/reset/reset-rzg2l-usbphy-ctrl.c, line 176
• drivers/soc/ixp4xx/ixp4xx-qmgr.c, 3 times
• drivers/staging/media/ipu3/ipu3-dmamap.c, 2 times
• drivers/staging/media/ipu7/ipu7-dma.c, line 72
• drivers/usb/host/octeon-hcd.c, 2 times
• drivers/vfio/vfio_iommu_type1.c, line 2989
• fs/gfs2/glock.c, line 1286
• include/asm-generic/bitops/fls64.h, line 31
• include/asm-generic/word-at-a-time.h, line 50
• include/linux/find.h, line 409
• include/linux/mm.h, line 5459
• include/linux/turris-omnia-mcu-interface.h, line 323
• include/net/ipv6.h, 2 times
• include/sound/pcm_params.h, line 60
• lib/closure.c, 2 times
• lib/find_bit.c, line 230
• lib/lz4/lz4defs.h, line 191
• lib/math/int_sqrt.c, line 27
• lib/tests/ffs_kunit.c, 3 times
• net/dsa/user.c, 3 times
• net/ipv4/fib_trie.c, line 1125
• net/sched/sch_qfq.c, 3 times
• security/selinux/ss/ebitmap.c, line 239
• sound/core/pcm_native.c, 2 times
• sound/soc/apple/mca.c, line 435
• sound/soc/codecs/pcm186x.c, line 443
• sound/soc/codecs/rt1011.c, line 1944
• sound/soc/codecs/tas2552.c, line 454
• sound/soc/codecs/tas6424.c, line 229
• sound/soc/codecs/tlv320adcx140.c, line 898
• sound/soc/codecs/tlv320aic3x.c, line 1354
• sound/soc/intel/avs/board_selection.c, line 582
• sound/soc/intel/catpt/pcm.c, line 841
• sound/soc/sof/intel/hda-mlink.c, 2 times
• tools/include/asm-generic/bitops/fls64.h, line 31
• virt/kvm/dirty_ring.c, line 67

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