linux-kernel - [PATCH] kconfig: tell the kconfig symbol of the restart reason

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Message-ID: <20230704055246.22893-1-rdunlap@infradead.org>
Date:   Mon,  3 Jul 2023 22:52:46 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     linux-kernel@...r.kernel.org
Cc:     Randy Dunlap <rdunlap@...radead.org>,
        Masahiro Yamada <masahiroy@...nel.org>,
        linux-kbuild@...r.kernel.org
Subject: [PATCH] kconfig: tell the kconfig symbol of the restart reason

When running 'make oldconfig' or 'make olddefconfig' without waiting
for prompts, it can be useful to know the restart reason so that it
can be fixed manually.

This is usually when the prompt value is a number or a string,
i.e., something other than y/m/n.

Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
Cc: Masahiro Yamada <masahiroy@...nel.org>
Cc: linux-kbuild@...r.kernel.org
---
Can the test for sym->name be omitted?

 scripts/kconfig/conf.c |    8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff -- a/scripts/kconfig/conf.c b/scripts/kconfig/conf.c
--- a/scripts/kconfig/conf.c
+++ b/scripts/kconfig/conf.c
@@ -652,8 +652,12 @@ static void check_conf(struct menu *menu
 			printf("-----\n");
 			break;
 		default:
-			if (!conf_cnt++)
-				printf("*\n* Restart config...\n*\n");
+			if (!conf_cnt++) {
+				printf("*\n* Restart config...\n");
+				if (sym->name)
+					printf("* due to symbol: %s\n", sym->name);
+				printf("*\n");
+			}
 			rootEntry = menu_get_parent_menu(menu);
 			conf(rootEntry);
 			break;