Message-ID: <9f8a0a8e09893e7087d2212fb0eeb94a908b7be1.camel@perches.com>
Date:   Thu, 30 Jan 2020 14:04:49 -0800
From:   Joe Perches <joe@...ches.com>
To:     Krzysztof Kozlowski <krzk@...nel.org>,
        Russell King <linux@...linux.org.uk>,
        Alexander Shiyan <shc_work@...l.ru>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        Vladimir Zapolskiy <vz@...ia.com>,
        Aaro Koskinen <aaro.koskinen@....fi>,
        Tony Lindgren <tony@...mide.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        Liviu Dudau <liviu.dudau@....com>,
        Sudeep Holla <sudeep.holla@....com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Avi Fishman <avifishman70@...il.com>,
        Tomer Maimon <tmaimon77@...il.com>,
        Tali Perry <tali.perry1@...il.com>,
        Patrick Venture <venture@...gle.com>,
        Nancy Yuen <yuenn@...gle.com>,
        Benjamin Fair <benjaminfair@...gle.com>,
        Olof Johansson <olof@...om.net>, Arnd Bergmann <arnd@...db.de>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-omap@...r.kernel.org,
        linux-stm32@...md-mailman.stormreply.com, openbmc@...ts.ozlabs.org,
        arm@...nel.org, soc@...nel.org
Subject: Re: [PATCH 2/2] ARM: configs: Cleanup old Kconfig options

On Thu, 2020-01-30 at 20:55 +0100, Krzysztof Kozlowski wrote:
> CONFIG_MMC_BLOCK_BOUNCE is gone since commit c3dccb74be28 ("mmc: core:
> Delete bounce buffer Kconfig option").
> 
> CONFIG_LBDAF is gone since commit 72deb455b5ec ("block: remove
> CONFIG_LBDAF").
> 
> CONFIG_IOSCHED_DEADLINE and CONFIG_IOSCHED_CFQ are gone since
> commit f382fb0bcef4 ("block: remove legacy IO schedulers").
> 
> The IOSCHED_DEADLINE was replaced by MQ_IOSCHED_DEADLINE and it will be
> now enabled by default (along with MQ_IOSCHED_KYBER).
> 
> The IOSCHED_BFQ seems to replace IOSCHED_CFQ so select it in configs
> previously choosing the latter.
> 
> CONFIG_CROSS_COMPILE is gone since commit f1089c92da79 ("kbuild: remove
> CONFIG_CROSS_COMPILE support").

Hi Krzysztof.

There seems there are a lot more of these unused CONFIG_<foo>
symbols in various defconfigs. (just for arm and treewide below)

ARM defconfigs:

--------------------------------------------------------------------

# find all defined config symbols in Kconfig files

$ git grep -P -oh '^\s*(?:menu)?config\s+\w+' -- '*/Kconfig*' | \
  sed -r -e 's/\s*config\s+//' -e 's/\s*menuconfig\s+//' | \
  sort | uniq > config_symbols

# find CONFIG_ symbols in arm defconfigs

$ git grep -w -oh -P 'CONFIG_\w+' 'arch/arm*/*defconfig*' | \
  sort | uniq > used_in_arm_defconfigs

# find all the unused symbols

$ cat used_in_arm_defconfigs | \
  while read line ; do \
    echo -n "$line " ; grep -w -c ${line/CONFIG_/} config_symbols ; \
  done | \
  grep " 0" | \
  sed 's/ 0//'
CONFIG_ARCH_AUTCPU12
CONFIG_ARCH_CDB89712
CONFIG_ARCH_CLEP7312
CONFIG_ARCH_EDB7211
CONFIG_ARCH_P720T
CONFIG_ARCH_R8A7796
CONFIG_BT_HCIBTUART
CONFIG_CC_STACKPROTECTOR_REGULAR
CONFIG_CHR_DEV_OSST
CONFIG_CIFS_STATS
CONFIG_CROSS_COMPILE
CONFIG_DEBUG_SPINLOCK_SLEEP
CONFIG_DETECT_SOFTLOCKUP
CONFIG_DM9000_DEBUGLEVEL
CONFIG_DRM_TINYDRM
CONFIG_EXT3_DEFAULTS_TO_ORDERED
CONFIG_EXT3_FS_XATTR
CONFIG_FB_XGI
CONFIG_GPIO_MOXART
CONFIG_HOTPLUG
CONFIG_INET6_XFRM_MODE_BEET
CONFIG_INET6_XFRM_MODE_TRANSPORT
CONFIG_INET6_XFRM_MODE_TUNNEL
CONFIG_INET_XFRM_MODE_BEET
CONFIG_INET_XFRM_MODE_TRANSPORT
CONFIG_INET_XFRM_MODE_TUNNEL
CONFIG_IOSCHED_CFQ
CONFIG_IOSCHED_DEADLINE
CONFIG_IP_NF_MATCH_ADDRTYPE
CONFIG_IP_NF_TARGET_LOG
CONFIG_IPX
CONFIG_IRCOMM
CONFIG_IRDA
CONFIG_IRDA_CACHE_LAST_LSAP
CONFIG_IRDA_DEBUG
CONFIG_IRDA_FAST_RR
CONFIG_IRDA_ULTRA
CONFIG_IRLAN
CONFIG_IRNET
CONFIG_IRTTY_SIR
CONFIG_KALLSYMS_EXTRA_PASS
CONFIG_LBDAF
CONFIG_LEDS_CPU
CONFIG_LEDS_TIMER
CONFIG_MAC80211_RC_PID
CONFIG_MACH_BIGDISK
CONFIG_MACH_D2NET
CONFIG_MACH_DOVE_DT
CONFIG_MACH_EDMINI_V2_DT
CONFIG_MACH_LINKSTATION_LSCHL
CONFIG_MACH_MSS2
CONFIG_MACH_U300_SPIDUMMY
CONFIG_MACH_VOICEBLUE
CONFIG_MEDIA_TUNER_CUSTOMISE
CONFIG_MMC_BLOCK_BOUNCE
CONFIG_MMP_SPI
CONFIG_MTD_DEBUG
CONFIG_MTD_DEBUG_VERBOSE
CONFIG_MTD_DOC2000
CONFIG_MTD_DOC2001
CONFIG_MTD_DOC2001PLUS
CONFIG_MTD_DOCPROBE_ADDRESS
CONFIG_MTD_DOCPROBE_ADVANCED
CONFIG_MTD_DOCPROBE_HIGH
CONFIG_MTD_M25P80
CONFIG_NET_CADENCE
CONFIG_NET_DMA
CONFIG_NET_ETHERNET
CONFIG_NET_PCI
CONFIG_NET_PCMCIA
CONFIG_NET_VENDOR_SMC
CONFIG_NF_CONNTRACK_IPV4
CONFIG_NF_CONNTRACK_IPV6
CONFIG_PCIE_AXXIA
CONFIG_PM_RUNTIME
CONFIG_PROC_DEVICETREE
CONFIG_PXA_FICP
CONFIG_QCOM_ADSP_PIL
CONFIG_QCOM_Q6V5_PIL
CONFIG_SA1100_FIR
CONFIG_SCSI_MULTI_LUN
CONFIG_SMB_FS
CONFIG_SMB_NLS_DEFAULT
CONFIG_SOC_CAMERA_OV2640
CONFIG_SOC_CAMERA_PLATFORM
CONFIG_SOUND_DMAP
CONFIG_SOUND_OSS
CONFIG_SOUND_PRIME
CONFIG_SOUND_TRACEINIT
CONFIG_SOUND_VIDC
CONFIG_SOUND_WAVEARTIST
CONFIG_SOUND_YM3812
CONFIG_SUSPEND_TIME
CONFIG_SYSCTL_SYSCALL
CONFIG_TIMER_STATS
CONFIG_UID_STAT
CONFIG_USB_CHIPIDEA_ULPI
CONFIG_USB_EHCI_HCD_AXXIA
CONFIG_USB_EHCI_MSM
CONFIG_USB_GADGET_DUMMY_HCD
CONFIG_USB_MSM_OTG
CONFIG_V4L_USB_DRIVERS
CONFIG_VIDEO_HELPER_CHIPS_AUTO
CONFIG_WAN_ROUTER
CONFIG_WAN_ROUTER_DRIVERS
CONFIG_WINBOND_FIR

--------------------------------------------------------------------

And treewide defconfigs:

$ git grep -P -oh '^\s*(?:menu)?config\s+\w+' -- '*/Kconfig*' | \
  sed -r -e 's/\s*config\s+//' -e 's/\s*menuconfig\s+//' | \
  sort | uniq > config_symbols

$ git grep -w -oh -P 'CONFIG_\w+' '*defconfig*' | \
  sort | uniq >  used_in_defconfigs

$ cat used_in_defconfigs | \
  while read line ; do \
    echo -n "$line " ; grep -w -c ${line/CONFIG_/} config_symbols ;  \
  done | \
  grep " 0" | \
  sed 's/ 0//'
CONFIG_ALI_FIR
CONFIG_ARCH_AUTCPU12
CONFIG_ARCH_CDB89712
CONFIG_ARCH_CLEP7312
CONFIG_ARCH_EDB7211
CONFIG_ARCH_P720T
CONFIG_ARCH_R8A7796
CONFIG_ARCPGU_DISPTYPE
CONFIG_ARCPGU_RGB888
CONFIG_ARPD
CONFIG_ATH79_MACH_AP121
CONFIG_ATH79_MACH_AP136
CONFIG_ATH79_MACH_AP81
CONFIG_ATH79_MACH_DB120
CONFIG_ATH79_MACH_PB44
CONFIG_ATH79_MACH_UBNT_XM
CONFIG_BLK_DEV_RAM_DAX
CONFIG_BOARD_EVM6457
CONFIG_BOARD_EVM6472
CONFIG_BOARD_EVM6474
CONFIG_BOARD_EVM6678
CONFIG_BT_HCIBTUART
CONFIG_CC_STACKPROTECTOR_REGULAR
CONFIG_CFQ_GROUP_IOSCHED
CONFIG_CGROUP_MEMCG
CONFIG_CGROUP_MEMCG_SWAP
CONFIG_CHR_DEV_OSST
CONFIG_CIFS_STATS
CONFIG_CROSS_COMPILE
CONFIG_CRYPTO_AES_586
CONFIG_CSKY_MPTIMER
CONFIG_DEBUG_SPINLOCK_SLEEP
CONFIG_DEFAULT_DEADLINE
CONFIG_DEFAULT_NOOP
CONFIG_DETECT_SOFTLOCKUP
CONFIG_DEVPTS_MULTIPLE_INSTANCES
CONFIG_DM9000_DEBUGLEVEL
CONFIG_DRM_TINYDRM
CONFIG_DSCC4
CONFIG_DVB_FE_CUSTOMISE
CONFIG_ENABLE_WARN_DEPRECATED
CONFIG_EXOFS_FS
CONFIG_EXPERIMENTAL
CONFIG_EXT2_FS_XIP
CONFIG_EXT3_DEFAULTS_TO_ORDERED
CONFIG_EXT3_FS_XATTR
CONFIG_FB_SH7785FB
CONFIG_FB_XGI
CONFIG_GPIO_MOXART
CONFIG_HEADERS_CHECK
CONFIG_HID_SUPPORT
CONFIG_HOTPLUG
CONFIG_I2C_PARPORT_LIGHT
CONFIG_INET6_XFRM_MODE_BEET
CONFIG_INET6_XFRM_MODE_ROUTEOPTIMIZATION
CONFIG_INET6_XFRM_MODE_TRANSPORT
CONFIG_INET6_XFRM_MODE_TUNNEL
CONFIG_INET_LRO
CONFIG_INET_XFRM_MODE_BEET
CONFIG_INET_XFRM_MODE_TRANSPORT
CONFIG_INET_XFRM_MODE_TUNNEL
CONFIG_INFINIBAND_CXGB3
CONFIG_IOSCHED_CFQ
CONFIG_IOSCHED_DEADLINE
CONFIG_IP_NF_MATCH_ADDRTYPE
CONFIG_IP_NF_TARGET_LOG
CONFIG_IPV6_PRIVACY
CONFIG_IPX
CONFIG_IRCOMM
CONFIG_IRDA
CONFIG_IRDA_CACHE_LAST_LSAP
CONFIG_IRDA_DEBUG
CONFIG_IRDA_FAST_RR
CONFIG_IRDA_ULTRA
CONFIG_IRLAN
CONFIG_IRNET
CONFIG_IRTTY_SIR
CONFIG_KALLSYMS_EXTRA_PASS
CONFIG_KINGSUN_DONGLE
CONFIG_KS959_DONGLE
CONFIG_KSDAZZLE_DONGLE
CONFIG_LBDAF
CONFIG_LEDS_CPU
CONFIG_LEDS_TIMER
CONFIG_MAC80211_RC_PID
CONFIG_MACH_BIGDISK
CONFIG_MACH_D2NET
CONFIG_MACH_DOVE_DT
CONFIG_MACH_EDMINI_V2_DT
CONFIG_MACH_LINKSTATION_LSCHL
CONFIG_MACH_MSS2
CONFIG_MACH_U300_SPIDUMMY
CONFIG_MACH_VOICEBLUE
CONFIG_MCS_FIR
CONFIG_MEDIA_TUNER_CUSTOMISE
CONFIG_MFD_SH_MOBILE_SDHI
CONFIG_MMC_BLOCK_BOUNCE
CONFIG_MMP_SPI
CONFIG_MTD_CHAR
CONFIG_MTD_DEBUG
CONFIG_MTD_DEBUG_VERBOSE
CONFIG_MTD_DOC2000
CONFIG_MTD_DOC2001
CONFIG_MTD_DOC2001PLUS
CONFIG_MTD_DOCPROBE_ADDRESS
CONFIG_MTD_DOCPROBE_ADVANCED
CONFIG_MTD_DOCPROBE_HIGH
CONFIG_MTD_M25P80
CONFIG_MTD_PARTITIONS
CONFIG_NCP_FS
CONFIG_NCPFS_EXTRAS
CONFIG_NCPFS_IOCTL_LOCKING
CONFIG_NCPFS_NFS_NS
CONFIG_NCPFS_NLS
CONFIG_NCPFS_OS2_NS
CONFIG_NCPFS_PACKET_SIGNING
CONFIG_NCPFS_SMALLDOS
CONFIG_NCPFS_STRONG
CONFIG_NET_CADENCE
CONFIG_NET_DCCPPROBE
CONFIG_NETDEV_1000
CONFIG_NETDEV_10000
CONFIG_NET_DMA
CONFIG_NET_ETHERNET
CONFIG_NET_PACKET_ENGINE
CONFIG_NET_PCI
CONFIG_NET_PCMCIA
CONFIG_NET_TCPPROBE
CONFIG_NET_VENDOR_EXAR
CONFIG_NET_VENDOR_SMC
CONFIG_NF_CONNTRACK_IPV4
CONFIG_NF_CONNTRACK_IPV6
CONFIG_NF_NAT_IPV4
CONFIG_NF_NAT_IPV6
CONFIG_NR_DMA_CHANNELS
CONFIG_NR_DMA_CHANNELS_BOOL
CONFIG_NSC_FIR
CONFIG_OCTEON_ETHERNET
CONFIG_OCTEON_USB
CONFIG_PCIEASPM_DEBUG
CONFIG_PCIE_AXXIA
CONFIG_PCI_LEGACY
CONFIG_PERF_COUNTERS
CONFIG_PHONE
CONFIG_PM_RUNTIME
CONFIG_PROC_DEVICETREE
CONFIG_PUV3_AC97
CONFIG_PUV3_MMC
CONFIG_PUV3_MUSB
CONFIG_PUV3_NAND
CONFIG_PUV3_UART
CONFIG_PUV3_UMAL
CONFIG_PXA_FICP
CONFIG_QCOM_ADSP_PIL
CONFIG_QCOM_Q6V5_PIL
CONFIG_RCU_CPU_STALL_INFO
CONFIG_SA1100_FIR
CONFIG_SBC834x
CONFIG_SCSI_MULTI_LUN
CONFIG_SCSI_OSD_INITIATOR
CONFIG_SCSI_OSD_ULD
CONFIG_SECURITY_SELINUX_BOOTPARAM_VALUE
CONFIG_SH_SIR
CONFIG_SIGMATEL_FIR
CONFIG_SMB_FS
CONFIG_SMB_NLS_DEFAULT
CONFIG_SMC_IRCC_FIR
CONFIG_SND_FSI_AK4642
CONFIG_SND_FSI_DA7210
CONFIG_SOC_CAMERA_MT9T112
CONFIG_SOC_CAMERA_OV2640
CONFIG_SOC_CAMERA_OV772X
CONFIG_SOC_CAMERA_PLATFORM
CONFIG_SOC_CAMERA_TW9910
CONFIG_SOUND_DMAP
CONFIG_SOUND_OSS
CONFIG_SOUND_PRIME
CONFIG_SOUND_TRACEINIT
CONFIG_SOUND_VIDC
CONFIG_SOUND_WAVEARTIST
CONFIG_SOUND_YM3812
CONFIG_SPI_XILINX_PLTFM
CONFIG_STAGING_EXCLUDE_BUILD
CONFIG_SUSPEND_TIME
CONFIG_SYSCTL_SYSCALL
CONFIG_TIMER_STATS
CONFIG_TOSHIBA_FIR
CONFIG_TREE_PREEMPT_RCU
CONFIG_UID_STAT
CONFIG_UIO_PDRV
CONFIG_USB_CHIPIDEA_ULPI
CONFIG_USB_CMMB_INNOFIDEI
CONFIG_USB_EHCI_HCD_AXXIA
CONFIG_USB_EHCI_MSM
CONFIG_USB_GADGET_DUMMY_HCD
CONFIG_USB_GADGET_M66592
CONFIG_USB_IRDA
CONFIG_USB_MSM_OTG
CONFIG_USB_WLAN_HED_AQ3
CONFIG_V4L_USB_DRIVERS
CONFIG_VIA_FIR
CONFIG_VIDEO_ALLOW_V4L1
CONFIG_VIDEO_HELPER_CHIPS_AUTO
CONFIG_VIDEO_SH_MOBILE_CEU
CONFIG_VLSI_FIR
CONFIG_W1_SLAVE_DS2760
CONFIG_WAN_ROUTER
CONFIG_WAN_ROUTER_DRIVERS
CONFIG_WINBOND_FIR
CONFIG_WLAN_80211

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