I reported a bug with this patch to 5.11.9-rc1 but it also appears here in
5.10.26-rc1...

Download the config file from Slackware x86_64 current:

https://mirrors.kernel.org/slackware/slackware64-current/source/k/kernel-configs/config-huge-5.10.25.x64

An new warning message appears during configuration:

$make oldconfig
  HOSTCC  scripts/basic/fixdep
  HOSTCC  scripts/kconfig/conf.o
  HOSTCC  scripts/kconfig/expr.o
  HOSTCC  scripts/kconfig/confdata.o
  LEX     scripts/kconfig/lexer.lex.c
  YACC    scripts/kconfig/parser.tab.[ch]
  HOSTCC  scripts/kconfig/preprocess.o
  HOSTCC  scripts/kconfig/symbol.o
  HOSTCC  scripts/kconfig/util.o
  HOSTCC  scripts/kconfig/lexer.lex.o
  HOSTCC  scripts/kconfig/parser.tab.o
  HOSTLD  scripts/kconfig/conf

WARNING: unmet direct dependencies detected for ADI_AXI_ADC
  Depends on [n]: IIO [=m] && HAS_IOMEM [=y] && OF [=n]
  Selected by [m]:
  - AD9467 [=m] && IIO [=m] && SPI [=y]

WARNING: unmet direct dependencies detected for ADI_AXI_ADC
  Depends on [n]: IIO [=m] && HAS_IOMEM [=y] && OF [=n]
  Selected by [m]:
  - AD9467 [=m] && IIO [=m] && SPI [=y]
#
# configuration written to .config
#