kconfig: begin PARAM state only when seeing a command keyword

Currently, any statement line starts with a keyword with TF_COMMAND
flag.  So, the following three lines are dead code.

        alloc_string(yytext, yyleng);
        zconflval.string = text;
        return T_WORD;

If a T_WORD token is returned in this context, it will cause syntax
error in the parser anyway.

The next commit will support the assignment statement where a line
starts with an arbitrary identifier.  So, I want the lexer to switch
to the PARAM state only when it sees a command keyword.

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

diff --git a/scripts/kconfig/zconf.l b/scripts/kconfig/zconf.l
index b3855909913c79e5c0a6b05c832c879b6d77223e..9a147977dc3f8fac0b063e1fa86e1affcb448dd1 100644 (file)
--- a/scripts/kconfig/zconf.l
+++ b/scripts/kconfig/zconf.l
@@ -102,10 +102,10 @@ n [A-Za-z0-9_-]
 <COMMAND>{
        {n}+    {
                const struct kconf_id *id = kconf_id_lookup(yytext, yyleng);
-               BEGIN(PARAM);
                current_pos.file = current_file;
                current_pos.lineno = yylineno;
                if (id && id->flags & TF_COMMAND) {
+                       BEGIN(PARAM);
                        yylval.id = id;
                        return id->token;
                }