CONFIG_UNUSED_BOARD_FILES is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
Board support for machines without known users
configname: CONFIG_UNUSED_BOARD_FILES
Linux Kernel Configuration
└─>Boot options
└─>Board support for machines without known users
In linux kernel since version 4.14.326 (release Date: 2023-09-23)
Most ATAGS based board files are completely unused and are
scheduled for removal in early 2023, and left out of kernels
by default now. If you are using a board file that is marked
as unused, turn on this option to build support into the kernel.
To keep support for your individual board from being removed,
send a reply to the email discussion at
https://lore.kernel.org/all/CAK8P3a0Z9vGEQbVRBo84bSyPFM-LF+hs5w8ZA51g2Z+NsdtDQA@mail.gmail.com/
scheduled for removal in early 2023, and left out of kernels
by default now. If you are using a board file that is marked
as unused, turn on this option to build support into the kernel.
To keep support for your individual board from being removed,
send a reply to the email discussion at
https://lore.kernel.org/all/CAK8P3a0Z9vGEQbVRBo84bSyPFM-LF+hs5w8ZA51g2Z+NsdtDQA@mail.gmail.com/
is selected by
CONFIG_MACH_SMDK6400CONFIG_MACH_ANW6410
CONFIG_MACH_MINI6410
CONFIG_MACH_REAL6410
CONFIG_MACH_SMDK6410
CONFIG_MACH_NCP
CONFIG_MACH_HMT
CONFIG_MACH_SMARTQ5
CONFIG_MACH_SMARTQ7
CONFIG_ARCH_S3C24XX
CONFIG_MACH_TTC_DKB
CONFIG_MACH_MICRO9H
CONFIG_MACH_MICRO9M
CONFIG_MACH_MICRO9L
CONFIG_MACH_MICRO9S
CONFIG_ARCH_CATS
CONFIG_ARCH_LUBBOCK
CONFIG_MACH_MAINSTONE
CONFIG_MACH_ZYLONITE300
CONFIG_MACH_ZYLONITE320
CONFIG_MACH_LITTLETON
CONFIG_MACH_TAVOREVB
CONFIG_MACH_SAAR
CONFIG_ARCH_PXA_IDP
CONFIG_ARCH_VIPER
CONFIG_MACH_ARCOM_ZEUS
CONFIG_MACH_BALLOON3
CONFIG_MACH_CSB726
CONFIG_MACH_CM_X300
CONFIG_MACH_CAPC7117
CONFIG_MACH_XCEP
CONFIG_MACH_LOGICPD_PXA270
CONFIG_MACH_PCM027
CONFIG_MACH_COLIBRI
CONFIG_MACH_COLIBRI_PXA270_INCOME
CONFIG_MACH_COLIBRI300
CONFIG_MACH_COLIBRI320
CONFIG_MACH_VPAC270
CONFIG_MACH_H4700
CONFIG_MACH_H5000
CONFIG_MACH_HIMALAYA
CONFIG_MACH_MAGICIAN
CONFIG_MACH_MIOA701
CONFIG_PXA_EZX
CONFIG_MACH_MP900C
CONFIG_MACH_PALMTE2
CONFIG_MACH_PALMT5
CONFIG_MACH_PALMTX
CONFIG_MACH_PALMZ72
CONFIG_MACH_PALMLD
CONFIG_MACH_CENTRO
CONFIG_MACH_TREO680
CONFIG_MACH_POODLE
CONFIG_MACH_CORGI
CONFIG_MACH_SHEPHERD
CONFIG_MACH_HUSKY
CONFIG_MACH_TOSA
CONFIG_MACH_ICONTROL
CONFIG_ARCH_PXA_ESERIES
CONFIG_MACH_ZIPIT2
CONFIG_ARCH_IOP32X