linux-kernel - KCONFIG_ALLCONFIG + allmodconfig = brokenness

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Date:	Sun, 29 Dec 2013 17:32:47 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	linux-kbuild@...r.kernel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: KCONFIG_ALLCONFIG + allmodconfig = brokenness

When KCONFIG_ALLCONFIG is used with "make allmodconfig", the result ends
up being largely the same as "make allyesconfig", because the resulting
kernel ends up with CONFIG_MODULES=n:

How to reproduce:

: tazenda 125 ; make O=../o.test allmodconfig
  GEN     /home/hpa/kernel/o.test/Makefile
scripts/kconfig/conf --allmodconfig Kconfig
#
# configuration written to .config
#
: tazenda 126 ; grep CONFIG_MODULES ../o.test/.config
CONFIG_MODULES_USE_ELF_RELA=y
CONFIG_MODULES=y
: tazenda 127 ; env KCONFIG_ALLCONFIG=/dev/null make O=../o.test
allmodconfig
  GEN     /home/hpa/kernel/o.test/Makefile
scripts/kconfig/conf --allmodconfig Kconfig
#
# configuration written to .config
#
: tazenda 128 ; grep CONFIG_MODULES ../o.test/.config
CONFIG_MODULES_USE_ELF_RELA=y
# CONFIG_MODULES is not set
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