kernel/scripts/kconfig/zconf.y, branch linux-rolling-stable

kconfig: rename zconf.y to parser.y

2019-02-13T14:25:58Z

Use a more logical name. Signed-off-by: Masahiro Yamada

kconfig: remove unused "file" field of yylval union

2019-01-06T00:46:51Z

This has never been used. Signed-off-by: Masahiro Yamada

kconfig: split the lexer out of zconf.y

2018-12-28T13:22:38Z

Compile zconf.lex.c independently of the other files. Signed-off-by: Masahiro Yamada

kconfig: split some C files out of zconf.y

2018-12-28T13:22:38Z

I want to compile each C file independently instead of including all of them from zconf.y. Split out confdata.c, expr.c, symbol.c, and preprocess.c . These are low-hanging fruits. Signed-off-by: Masahiro Yamada

kconfig: convert to SPDX License Identifier

2018-12-28T13:22:28Z

All files in lxdialog/ are licensed under GPL-2.0+, and the rest are under GPL-2.0. I added GPL-2.0 tags to test scripts in tests/. Documentation/process/license-rules.rst does not suggest anything about the flex/bison files. Because flex does not accept the C++ comment style at the very top of a file, I used the C style for zconf.l, and so for zconf.y for consistency. Signed-off-by: Masahiro Yamada

kconfig: remove keyword lookup table entirely

2018-12-28T11:44:38Z

Commit 7a88488bbc23 ("[PATCH] kconfig: use gperf for kconfig keywords") introduced gperf for the keyword lookup. Then, commit bb3290d91695 ("Remove gperf usage from toolchain") killed the gperf use. As a result, the linear keyword search was left behind. If we do not use gperf, there is no reason to have the separate table of the keywords. Move all keywords back to the lexer. I also refactored the lexer to remove the COMMAND and PARAM states. Signed-off-by: Masahiro Yamada

kconfig: stop associating kconf_id with yylval

2018-12-21T15:25:55Z

The lexer has conventionally associated kconf_id data with yylval to carry additional information to the parser. No token is relying on this any more. Signed-off-by: Masahiro Yamada

kconfig: refactor end token rules

2018-12-21T15:25:54Z

T_ENDMENU, T_ENDCHOICE, T_ENDIF are the last users of kconf_id associated with yylval. Refactor them to not use it. Signed-off-by: Masahiro Yamada

kconfig: use T_WORD instead of T_VARIABLE for variables

2018-12-21T15:25:53Z

There is no grammatical ambiguity by using T_WORD for variables. The parser can distinguish variables from symbols from the context. Signed-off-by: Masahiro Yamada

kconfig: use specific tokens instead of T_ASSIGN for assignments

2018-12-21T15:25:52Z

Currently, the lexer returns T_ASSIGN for all of =, :=, and += associating yylval with the flavor. I want to make the generated lexer as simple as possible. So, the lexer should convert keywords to tokens without thinking about the meaning. = -> T_EQUAL := -> T_COLON_EQUAL += -> T_PLUS_EQUAL Unfortunately, Kconfig uses = instead of == for the equal operator. So, the same token T_EQUAL is used for assignment and comparison. The parser can still distinguish them from the context. Signed-off-by: Masahiro Yamada