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authorMasahiro Yamada <yamada.masahiro@socionext.com>2018-02-17 03:38:32 +0900
committerMasahiro Yamada <yamada.masahiro@socionext.com>2018-03-02 09:20:44 +0900
commitf4bc1eefc1608e9a7d40f5fdfc3acd560ba6f477 (patch)
treea06cdfc2b08ecd01d786f0514aa10c282d113502
parentcd81fc82b93fa408c30e08f59e5ef8caaa91d1d2 (diff)
downloadlinux-f4bc1eefc1608e9a7d40f5fdfc3acd560ba6f477.tar.bz2
kconfig: set SYMBOL_AUTO to the symbol marked with defconfig_list
The 'defconfig_list' is a weird attribute. If the '.config' is missing, conf_read_simple() iterates over all visible defaults, then it uses the first one for which fopen() succeeds. config DEFCONFIG_LIST string depends on !UML option defconfig_list default "/lib/modules/$UNAME_RELEASE/.config" default "/etc/kernel-config" default "/boot/config-$UNAME_RELEASE" default "$ARCH_DEFCONFIG" default "arch/$ARCH/defconfig" However, like other symbols, the first visible default is always written out to the .config file. This might be different from what has been actually used. For example, on my machine, the third one "/boot/config-$UNAME_RELEASE" is opened, like follows: $ rm .config $ make oldconfig 2>/dev/null scripts/kconfig/conf --oldconfig Kconfig # # using defaults found in /boot/config-4.4.0-112-generic # * * Restart config... * * * IRQ subsystem * Expose irq internals in debugfs (GENERIC_IRQ_DEBUGFS) [N/y/?] (NEW) However, the resulted .config file contains the first one since it is visible: $ grep CONFIG_DEFCONFIG_LIST .config CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config" In order to stop confusing people, prevent this CONFIG option from being written to the .config file. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>
-rw-r--r--scripts/kconfig/menu.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/scripts/kconfig/menu.c b/scripts/kconfig/menu.c
index 99222855544c..36cd3e1f1c28 100644
--- a/scripts/kconfig/menu.c
+++ b/scripts/kconfig/menu.c
@@ -212,6 +212,7 @@ void menu_add_option(int token, char *arg)
sym_defconfig_list = current_entry->sym;
else if (sym_defconfig_list != current_entry->sym)
zconf_error("trying to redefine defconfig symbol");
+ sym_defconfig_list->flags |= SYMBOL_AUTO;
break;
case T_OPT_ENV:
prop_add_env(arg);