linux-kernel - [PATCH] kconfig: remove meaningless if-conditional in conf

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Date:   Thu, 11 Jul 2019 16:33:17 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     linux-kbuild@...r.kernel.org
Cc:     Ulf Magnusson <ulfalizer@...il.com>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH] kconfig: remove meaningless if-conditional in conf_read()

sym_is_choice(sym) has already been checked by previous if-block:

    if (sym_is_choice(sym) || (sym->flags & SYMBOL_NO_WRITE))
            continue;

Hence, the following code is redundant, and the comment is misleading:

    if (!sym_is_choice(sym))
            continue;
    /* fall through */

It always takes 'continue', never falls though.

Clean up the dead code.

Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
---

 scripts/kconfig/confdata.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/scripts/kconfig/confdata.c b/scripts/kconfig/confdata.c
index 18e8051d89d7..cbb6efa4a5a6 100644
--- a/scripts/kconfig/confdata.c
+++ b/scripts/kconfig/confdata.c
@@ -534,11 +534,9 @@ int conf_read(const char *name)
 			switch (sym->type) {
 			case S_BOOLEAN:
 			case S_TRISTATE:
-				if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
-					break;
-				if (!sym_is_choice(sym))
+				if (sym->def[S_DEF_USER].tri == sym_get_tristate_value(sym))
 					continue;
-				/* fall through */
+				break;
 			default:
 				if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
 					continue;
-- 
2.17.1