u-boot_unused_configs

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u-boot_unused_configs [2019/04/13 11:11] – [Example] rpjdayu-boot_unused_configs [2019/04/13 11:29] (current) – [False positives] rpjday
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 so I can clearly improve the script. so I can clearly improve the script.
 +
 +Also, I forgot to take into account that one could "select" a Kconfig option, whereupon that Kconfig option could then select further options, without ever testing the option itself. Here's an example:
 +
 +<code>
 +>>>>> TEGRA_COMMON
 +arch/arm/mach-tegra/Kconfig:23:config TEGRA_COMMON
 +arch/arm/mach-tegra/Kconfig:58: select TEGRA_COMMON
 +arch/arm/mach-tegra/Kconfig:66: select TEGRA_COMMON
 +</code>
 +
 +My script flags that because there is no occurrence of "CONFIG_TEGRA_COMMON" but, of course, in this case, there doesn't have to be. Another improvement to be made.
  
 ===== Example ===== ===== Example =====
  
 Here's a single example of running the script on the directory ''drivers/mmc'', which generates some of the very false positives I just warned about, but also displays actual unused configs. Here's a single example of running the script on the directory ''drivers/mmc'', which generates some of the very false positives I just warned about, but also displays actual unused configs.
 +
 +<code>
 +$ find_unused_configs.sh drivers/mmc
 +</code>
  
 <code> <code>
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 As you can see, most of that represent false positives, but the last few lines do in fact show Kbuild options that are unreferenced anywhere in the code base. As you can see, most of that represent false positives, but the last few lines do in fact show Kbuild options that are unreferenced anywhere in the code base.
 +
 +===== Example: arch/arm =====
 +
 +As a second example, I listed all apparently unused Kbuild options under ''arch/arm''. Note how, mixed in with each example is a tree-wide scan for that symbol.
 +
 +<code>
 +>>>>> 98DX3236
 +arch/arm/dts/armada-xp-98dx3236.dtsi:17: model = "Marvell 98DX3236 SoC";
 +arch/arm/dts/armada-xp-98dx3236.dtsi:55: * 98DX3236 has 1 x1 PCIe unit Gen2.0
 +arch/arm/mach-mvebu/Kconfig:78:config 98DX3236
 +arch/arm/mach-mvebu/cpu.c:231: puts("98DX3236-");
 +>>>>> 98DX3336
 +arch/arm/dts/armada-xp-98dx3336.dtsi:14: model = "Marvell 98DX3336 SoC";
 +arch/arm/mach-mvebu/Kconfig:74:config 98DX3336
 +arch/arm/mach-mvebu/Kconfig:157: select 98DX3336
 +arch/arm/mach-mvebu/cpu.c:234: puts("98DX3336-");
 +>>>>> 98DX4251
 +arch/arm/dts/armada-xp-98dx4251.dtsi:14: model = "Marvell 98DX4251 SoC";
 +arch/arm/mach-mvebu/Kconfig:70:config 98DX4251
 +arch/arm/mach-mvebu/cpu.c:237: puts("98DX4251-");
 +>>>>> ARMADA_32BIT
 +arch/arm/mach-mvebu/Kconfig:7:config ARMADA_32BIT
 +arch/arm/mach-mvebu/Kconfig:25: select ARMADA_32BIT
 +arch/arm/mach-mvebu/Kconfig:29: select ARMADA_32BIT
 +arch/arm/mach-mvebu/Kconfig:34: select ARMADA_32BIT
 +arch/arm/mach-mvebu/Kconfig:68: select ARMADA_32BIT
 +>>>>> ARMADA_64BIT
 +arch/arm/mach-mvebu/Kconfig:18:config ARMADA_64BIT
 +>>>>> BCM2836
 +arch/arm/mach-bcm283x/Kconfig:6:config BCM2836
 +arch/arm/mach-bcm283x/Kconfig:7: bool "Broadcom BCM2836 SoC support"
 +arch/arm/mach-bcm283x/Kconfig:41:   support BCM2836/BCM2837-based Raspberry Pis such as the RPi 2 and
 +arch/arm/mach-bcm283x/Kconfig:66:   Support for all BCM2836-based Raspberry Pi variants, such as
 +arch/arm/mach-bcm283x/Kconfig:84: select BCM2836
 +>>>>> BCM2837
 +arch/arm/mach-bcm283x/Kconfig:12:config BCM2837
 +arch/arm/mach-bcm283x/Kconfig:13: bool "Broadcom BCM2837 SoC support"
 +arch/arm/mach-bcm283x/Kconfig:17: bool "Broadcom BCM2837 SoC 32-bit support"
 +arch/arm/mach-bcm283x/Kconfig:19: select BCM2837
 +arch/arm/mach-bcm283x/Kconfig:24: bool "Broadcom BCM2837 SoC 64-bit support"
 +arch/arm/mach-bcm283x/Kconfig:26: select BCM2837
 +arch/arm/mach-bcm283x/Kconfig:41:   support BCM2836/BCM2837-based Raspberry Pis such as the RPi 2 and
 +arch/arm/mach-bcm283x/Kconfig:69:   This option also supports BCM2837-based variants such as the RPi 3
 +arch/arm/mach-bcm283x/Kconfig:89:   Support for all BCM2837-based Raspberry Pi variants, such as
 +arch/arm/mach-bcm283x/Kconfig:105:   Support for all BCM2837-based Raspberry Pi variants, such as
 +>>>>> BCM2837_32B
 +arch/arm/mach-bcm283x/Kconfig:16:config BCM2837_32B
 +arch/arm/mach-bcm283x/Kconfig:100: select BCM2837_32B
 +>>>>> BCM2837_64B
 +arch/arm/mach-bcm283x/Kconfig:23:config BCM2837_64B
 +arch/arm/mach-bcm283x/Kconfig:128: select BCM2837_64B
 +>>>>> CM1136
 +arch/arm/mach-integrator/Kconfig:40:config CM1136
 +include/armcoremodule.h:35: /*   CM1136-EJ-S */
 +tools/buildman/board.py:85:            options: board-specific options (e.g. integratorcp:CM1136)
 +>>>>> CM720T
 +arch/arm/mach-integrator/Kconfig:24:config CM720T
 +board/armltd/integrator/README:71:ap720t_config ** CM720T
 +>>>>> CM946ES
 +arch/arm/mach-integrator/Kconfig:36:config CM946ES
 +>>>>> DRA7_DSPEVE_OPP_NOM
 +arch/arm/mach-omap2/omap5/Kconfig:94:config DRA7_DSPEVE_OPP_NOM
 +>>>>> DRA7_GPU_OPP_NOM
 +arch/arm/mach-omap2/omap5/Kconfig:142:config DRA7_GPU_OPP_NOM
 +>>>>> DRA7_IVA_OPP_NOM
 +arch/arm/mach-omap2/omap5/Kconfig:118:config DRA7_IVA_OPP_NOM
 +>>>>> MESON64_COMMON
 +arch/arm/mach-meson/Kconfig:3:config MESON64_COMMON
 +arch/arm/mach-meson/Kconfig:16: select MESON64_COMMON
 +arch/arm/mach-meson/Kconfig:42: select MESON64_COMMON
 +>>>>> MULTI_DTB_FIT_UNCOMPRESS_SZ
 +arch/arm/mach-rmobile/Kconfig.64:92:config MULTI_DTB_FIT_UNCOMPRESS_SZ
 +dts/Kconfig:174:config MULTI_DTB_FIT_UNCOMPRESS_SZ
 +lib/fdtdec.c:1185: size_t sz_out = CONFIG_VAL(MULTI_DTB_FIT_UNCOMPRESS_SZ);
 +>>>>> MULTI_DTB_FIT_USER_DEF_ADDR
 +arch/arm/mach-rmobile/Kconfig.64:96:config MULTI_DTB_FIT_USER_DEF_ADDR
 +dts/Kconfig:183:config MULTI_DTB_FIT_USER_DEF_ADDR
 +lib/fdtdec.c:1210: dst = (void *)CONFIG_VAL(MULTI_DTB_FIT_USER_DEF_ADDR);
 +>>>>> MV78460
 +arch/arm/dts/armada-xp-mv78460.dtsi:9: * Contains definitions specific to the Armada XP MV78460 SoC that are not
 +arch/arm/dts/armada-xp-mv78460.dtsi:16: model = "Marvell Armada XP MV78460 SoC";
 +arch/arm/dts/armada-xp-mv78460.dtsi:66: * MV78460 has 4 PCIe units Gen2.0: Two units can be
 +arch/arm/mach-mvebu/Kconfig:62:config MV78460
 +arch/arm/mach-mvebu/Kconfig:131: select MV78460
 +arch/arm/mach-mvebu/Kconfig:139: select MV78460
 +arch/arm/mach-mvebu/serdes/axp/high_speed_env_lib.c:153: * Right now only MV78460 is supported. Other SoC's might need
 +arch/arm/mach-mvebu/serdes/axp/high_speed_env_lib.c:163: * Right now only MV78460 is supported. Other SoC's might need
 +arch/arm/mach-mvebu/cpu.c:216: puts("MV78460-");
 +>>>>> MX6_SMP
 +arch/arm/mach-imx/mx6/Kconfig:3:config MX6_SMP
 +arch/arm/mach-imx/mx6/Kconfig:21: select MX6_SMP
 +arch/arm/mach-imx/mx6/Kconfig:26: select MX6_SMP
 +arch/arm/mach-imx/mx6/Kconfig:31: select MX6_SMP
 +arch/arm/mach-imx/mx6/Kconfig:36: select MX6_SMP
 +>>>>> PUB_ROM_DATA_SIZE
 +arch/arm/mach-omap2/am33xx/Kconfig:284:config PUB_ROM_DATA_SIZE
 +>>>>> R8A7795
 +arch/arm/dts/r8a7795-u-boot.dtsi:3: * Device Tree Source extras for U-Boot on RCar R8A7795 SoC
 +arch/arm/mach-rmobile/Kconfig.64:5:config R8A7795
 +arch/arm/mach-rmobile/Kconfig.64:6: bool "Renesas SoC R8A7795"
 +arch/arm/mach-rmobile/Kconfig.64:61: imply R8A7795
 +arch/arm/mach-rmobile/Kconfig.64:72: imply R8A7795
 +arch/arm/mach-rmobile/cpu_info.c:62: { RMOBILE_CPU_TYPE_R8A7795, "R8A7795" },
 +doc/README.rmobile:29:| R8A7795  H3   | Renesas Electronics ULCB ES2.0+        | r8a7795_ulcb
 +drivers/pinctrl/renesas/Kconfig:60: bool "Renesas RCar Gen3 R8A7795 pin control driver"
 +drivers/pinctrl/renesas/Kconfig:63:   Support pin multiplexing control on Renesas RCar Gen3 R8A7795 SoCs.
 +drivers/pinctrl/renesas/pfc-r8a7795.c:3: * R8A7795 ES2.0+ processor support - PFC hardware block.
 +drivers/pinctrl/renesas/pfc-r8a7795.c:1513: * R8A7795 has 8 banks with 32 GPIOs in each => 256 GPIOs.
 +drivers/clk/renesas/Kconfig:52: bool "Renesas R8A7795 clock driver"
 +drivers/clk/renesas/Kconfig:55:   Enable this to support the clocks on Renesas R8A7795 SoC.
 +>>>>> R8A7796
 +arch/arm/dts/r8a7796-u-boot.dtsi:3: * Device Tree Source extras for U-Boot on RCar R8A7796 SoC
 +arch/arm/mach-rmobile/Kconfig.64:10:config R8A7796
 +arch/arm/mach-rmobile/Kconfig.64:11: bool "Renesas SoC R8A7796"
 +arch/arm/mach-rmobile/Kconfig.64:62: imply R8A7796
 +arch/arm/mach-rmobile/Kconfig.64:73: imply R8A7796
 +arch/arm/mach-rmobile/cpu_info.c:63: { RMOBILE_CPU_TYPE_R8A7796, "R8A7796" },
 +doc/README.rmobile:32:| R8A7796  M3-W | Renesas Electronics ULCB               | r8a7796_ulcb
 +drivers/pinctrl/renesas/Kconfig:70: bool "Renesas RCar Gen3 R8A7796 pin control driver"
 +drivers/pinctrl/renesas/Kconfig:73:   Support pin multiplexing control on Renesas RCar Gen3 R8A7796 SoCs.
 +drivers/pinctrl/renesas/pfc-r8a7796.c:3: * R8A7796 processor support - PFC hardware block.
 +drivers/pinctrl/renesas/pfc-r8a7796.c:1523: * R8A7796 has 8 banks with 32 GPIOs in each => 256 GPIOs.
 +drivers/pinctrl/renesas/pfc-r8a77990.c:9: * R8A7796 processor support - PFC hardware block.
 +drivers/clk/renesas/r8a7796-cpg-mssr.c:3: * Renesas R8A7796 CPG MSSR driver
 +drivers/clk/renesas/Kconfig:58: bool "Renesas R8A7796 clock driver"
 +drivers/clk/renesas/Kconfig:61:   Enable this to support the clocks on Renesas R8A7796 SoC.
 +>>>>> R8A77965
 +arch/arm/dts/r8a77965.dtsi:3: * Device Tree Source for the R-Car M3-N (R8A77965) SoC
 +arch/arm/dts/r8a77965-u-boot.dtsi:3: * Device Tree Source extras for U-Boot on RCar R8A77965 SoC
 +arch/arm/mach-rmobile/Kconfig.64:15:config R8A77965
 +arch/arm/mach-rmobile/Kconfig.64:16: bool "Renesas SoC R8A77965"
 +arch/arm/mach-rmobile/Kconfig.64:63: imply R8A77965
 +arch/arm/mach-rmobile/Kconfig.64:74: imply R8A77965
 +arch/arm/mach-rmobile/cpu_info.c:64: { RMOBILE_CPU_TYPE_R8A77965, "R8A77965" },
 +doc/README.rmobile:35:| R8A77965 M3-N | Renesas Electronics ULCB               | r8a77965_ulcb
 +drivers/pinctrl/renesas/Kconfig:80: bool "Renesas RCar Gen3 R8A77965 pin control driver"
 +drivers/pinctrl/renesas/Kconfig:83:   Support pin multiplexing control on Renesas RCar Gen3 R8A77965 SoCs.
 +drivers/pinctrl/renesas/pfc-r8a77965.c:3: * R8A77965 processor support - PFC hardware block.
 +drivers/pinctrl/renesas/pfc-r8a77965.c:1518: * R8A77965 has 8 banks with 32 GPIOs in each => 256 GPIOs.
 +drivers/clk/renesas/Kconfig:64: bool "Renesas R8A77965 clock driver"
 +drivers/clk/renesas/Kconfig:67:   Enable this to support the clocks on Renesas R8A77965 SoC.
 +>>>>> R8A77970
 +arch/arm/dts/r8a77970.dtsi:3: * Device Tree Source for the R-Car V3M (R8A77970) SoC
 +arch/arm/dts/r8a77970-u-boot.dtsi:3: * Device Tree Source extras for U-Boot on RCar R8A77970 SoC
 +arch/arm/mach-rmobile/Kconfig.64:20:config R8A77970
 +arch/arm/mach-rmobile/Kconfig.64:21: bool "Renesas SoC R8A77970"
 +arch/arm/mach-rmobile/Kconfig.64:49: imply R8A77970
 +arch/arm/mach-rmobile/cpu_info.c:65: { RMOBILE_CPU_TYPE_R8A77970, "R8A77970" },
 +drivers/pinctrl/renesas/Kconfig:90: bool "Renesas RCar Gen3 R8A77970 pin control driver"
 +drivers/pinctrl/renesas/Kconfig:93:   Support pin multiplexing control on Renesas RCar Gen3 R8A77970 SoCs.
 +drivers/pinctrl/renesas/pfc-r8a77970.c:3: * R8A77970 processor support - PFC hardware block.
 +drivers/clk/renesas/Kconfig:70: bool "Renesas R8A77970 clock driver"
 +drivers/clk/renesas/Kconfig:73:   Enable this to support the clocks on Renesas R8A77970 SoC.
 +drivers/clk/renesas/r8a77970-cpg-mssr.c:3: * Renesas R8A77970 CPG MSSR driver
 +>>>>> R8A77990
 +arch/arm/dts/r8a77990-u-boot.dtsi:3: * Device Tree Source extras for U-Boot on RCar R8A77990 SoC
 +arch/arm/dts/r8a77990.dtsi:3: * Device Tree Source for the R-Car E3 (R8A77990) SoC
 +arch/arm/mach-rmobile/Kconfig.64:25:config R8A77990
 +arch/arm/mach-rmobile/Kconfig.64:26: bool "Renesas SoC R8A77990"
 +arch/arm/mach-rmobile/Kconfig.64:55: imply R8A77990
 +arch/arm/mach-rmobile/cpu_info.c:66: { RMOBILE_CPU_TYPE_R8A77990, "R8A77990" },
 +drivers/pinctrl/renesas/Kconfig:100: bool "Renesas RCar Gen3 R8A77990 pin control driver"
 +drivers/pinctrl/renesas/Kconfig:103:   Support pin multiplexing control on Renesas RCar Gen3 R8A77990 SoCs.
 +drivers/pinctrl/renesas/pfc-r8a77990.c:3: * R8A77990 processor support - PFC hardware block.
 +drivers/pinctrl/renesas/pfc-r8a77990.c:1285: * R8A77990 has 7 banks with 32 GPIOs in each => 224 GPIOs.
 +drivers/pinctrl/renesas/pfc-r8a77990.c:1299: * The pin positions are different between different R8A77990
 +drivers/pinctrl/renesas/pfc-r8a77990.c:1302: * R8A77990 to calculate a unique number for each pin.
 +drivers/clk/renesas/Kconfig:76: bool "Renesas R8A77990 clock driver"
 +drivers/clk/renesas/Kconfig:79:   Enable this to support the clocks on Renesas R8A77990 SoC.
 +>>>>> R8A77995
 +arch/arm/dts/r8a77995.dtsi:3: * Device Tree Source for the R-Car D3 (R8A77995) SoC
 +arch/arm/dts/r8a77995-u-boot.dtsi:3: * Device Tree Source extras for U-Boot on RCar R8A77995 SoC
 +arch/arm/mach-rmobile/Kconfig.64:30:config R8A77995
 +arch/arm/mach-rmobile/Kconfig.64:31: bool "Renesas SoC R8A77995"
 +arch/arm/mach-rmobile/Kconfig.64:43: imply R8A77995
 +arch/arm/mach-rmobile/cpu_info.c:67: { RMOBILE_CPU_TYPE_R8A77995, "R8A77995" },
 +drivers/pinctrl/renesas/pfc-r8a77995.c:3: * R8A77995 processor support - PFC hardware block.
 +drivers/pinctrl/renesas/Kconfig:110: bool "Renesas RCar Gen3 R8A77995 pin control driver"
 +drivers/pinctrl/renesas/Kconfig:113:   Support pin multiplexing control on Renesas RCar Gen3 R8A77995 SoCs.
 +drivers/clk/renesas/Kconfig:82: bool "Renesas R8A77995 clock driver"
 +drivers/clk/renesas/Kconfig:85:   Enable this to support the clocks on Renesas R8A77995 SoC.
 +>>>>> SPL_ROCKCHIP_EARLYRETURN_TO_BROM
 +arch/arm/mach-rockchip/Kconfig:36: select SPL_ROCKCHIP_EARLYRETURN_TO_BROM
 +arch/arm/mach-rockchip/Kconfig:209:config SPL_ROCKCHIP_EARLYRETURN_TO_BROM
 +>>>>> SPL_SYS_THUMB_BUILD
 +arch/arm/Kconfig:331:config SPL_SYS_THUMB_BUILD
 +arch/arm/Kconfig:868: select SPL_SYS_THUMB_BUILD if !ARM64
 +>>>>> SPL_ZYNQMP_TWO_SDHCI
 +arch/arm/mach-zynqmp/Kconfig:102:config SPL_ZYNQMP_TWO_SDHCI
 +arch/arm/mach-zynqmp/spl.c:88:#if defined(SPL_ZYNQMP_TWO_SDHCI)
 +>>>>> SYS_FSL_ERRATUM_A008407
 +arch/arm/cpu/armv7/ls102xa/Kconfig:6: select SYS_FSL_ERRATUM_A008407
 +arch/arm/cpu/armv7/ls102xa/Kconfig:112:config SYS_FSL_ERRATUM_A008407
 +>>>>> SYS_K3_MCU_SCRATCHPAD_SIZE
 +arch/arm/mach-k3/Kconfig:37:config SYS_K3_MCU_SCRATCHPAD_SIZE
 +>>>>> TARGET_RPI
 +arch/arm/mach-bcm283x/Kconfig:36:config TARGET_RPI
 +>>>>> TARGET_RPI_0_W
 +arch/arm/mach-bcm283x/Kconfig:47:config TARGET_RPI_0_W
 +>>>>> TARGET_RPI_3
 +arch/arm/mach-bcm283x/Kconfig:102:config TARGET_RPI_3
 +>>>>> TARGET_VEXPRESS64_AEMV8A
 +arch/arm/Kconfig:975:config TARGET_VEXPRESS64_AEMV8A
 +>>>>> TEGRA_ARMV7_COMMON
 +arch/arm/mach-tegra/Kconfig:52:config TEGRA_ARMV7_COMMON
 +arch/arm/mach-tegra/Kconfig:82: select TEGRA_ARMV7_COMMON
 +arch/arm/mach-tegra/Kconfig:88: select TEGRA_ARMV7_COMMON
 +arch/arm/mach-tegra/Kconfig:92: select TEGRA_ARMV7_COMMON
 +arch/arm/mach-tegra/Kconfig:96: select TEGRA_ARMV7_COMMON
 +>>>>> TEGRA_COMMON
 +arch/arm/mach-tegra/Kconfig:23:config TEGRA_COMMON
 +arch/arm/mach-tegra/Kconfig:58: select TEGRA_COMMON
 +arch/arm/mach-tegra/Kconfig:66: select TEGRA_COMMON
 +>>>>> TPL_MAX_SIZE
 +arch/arm/mach-rockchip/Kconfig:80:config TPL_MAX_SIZE
 +arch/arm/mach-rockchip/Kconfig:122:config TPL_MAX_SIZE
 +common/spl/Kconfig:986:config TPL_MAX_SIZE
 +>>>>> TPL_ROCKCHIP_BACK_TO_BROM
 +arch/arm/mach-rockchip/Kconfig:174:config TPL_ROCKCHIP_BACK_TO_BROM
 +>>>>> TPL_ROCKCHIP_EARLYRETURN_TO_BROM
 +arch/arm/mach-rockchip/Kconfig:223:config TPL_ROCKCHIP_EARLYRETURN_TO_BROM
 +>>>>> VIDEO_LCD_PANEL_HITACHI_TX18D42VM
 +arch/arm/mach-sunxi/Kconfig:946:config VIDEO_LCD_PANEL_HITACHI_TX18D42VM
 +>>>>> VIDEO_LCD_PANEL_LVDS
 +arch/arm/mach-sunxi/Kconfig:926:config VIDEO_LCD_PANEL_LVDS
 +>>>>> VIDEO_LCD_PANEL_PARALLEL
 +arch/arm/mach-sunxi/Kconfig:922:config VIDEO_LCD_PANEL_PARALLEL
 +</code>
  • u-boot_unused_configs.1555153906.txt.gz
  • Last modified: 2019/04/13 11:11
  • by rpjday