linux-toradex.git/scripts/kconfig/zconf.y, branch v2.6.39-rc5

kconfig: add an option to determine a menu's visibility

2010-11-22T13:27:17+00:00

This option is aimed to add the possibility to control a menu's visibility
without adding dependency to the expression to all the submenu.

Signed-off-by: Arnaud Lacombe 
Acked-by: Mauro Carvalho Chehab 
Tested-by: Mauro Carvalho Chehab 
Signed-off-by: Mauro Carvalho Chehab

kconfig: expand by default the rootmenu's prompt

2010-09-19T22:19:53+00:00

Signed-off-by: Arnaud Lacombe 
Reviewed-by: Sam Ravnborg 
Reviewed-by: Michal Marek

kconfig: implement the `mainmenu' directive

2010-09-19T22:19:39+00:00

If specified, the directive must be placed at the top of the Kconfig file.

We need to change the grammar to make the mainmenu directive set the
`rootmenu' prompt. This reflect how menu_add_prompt() works internally, ie.
set the prompt of the `current_entry', pointing originally to `rootmenu'.

Signed-off-by: Arnaud Lacombe 
Reviewed-by: Sam Ravnborg 
Reviewed-by: Michal Marek

kconfig: fix zconfdump()

2010-04-14T13:34:18+00:00

zconfdump(), which is used for debugging, can't recognize P_SELECT,
P_RANGE and P_MENU (if associated with a symbol, aka "menuconfig"),
and output something like this:

config X86
  boolean
  default y
  unknown prop 6!
  unknown prop 6!
  unknown prop 6!
  ...

Signed-off-by: Li Zefan 
Signed-off-by: Michal Marek

Improve kconfig symbol hashing

2010-02-02T13:33:55+00:00

While looking for something else I noticed that the symbol
hash function used by kconfig is quite poor. It doesn't
use any of the standard hash techniques but simply
adds up the string and then uses power of two masking,
which is both known to perform poorly.

The current x86 kconfig has over 7000 symbols.

When I instrumented it showed that the minimum hash chain
length was 16 and a significant number of them was over
30.

It didn't help that the hash table size was only 256 buckets.

This patch increases the hash table size to a larger prime
and switches to a FNV32 hash. I played around with a couple of hash
functions, but that one seemed to perform best with reasonable
hash table sizes.

Increasing the hash table size even further didn't
seem like a good idea, because there are a couple of global
walks which walk the complete hash table.

I also moved the unnamed bucket to 0. It's still the longest
of all the buckets (44 entries), but hopefully it's not
often hit except for the global walk which doesn't care.

The result is a much nicer distribution:
(first column bucket length, second number of buckets with that length)

1: 3505
2: 1236
3: 294
4: 52
5: 3
47: 1		<--- this is the unnamed symbols bucket

There are still some 5+ buckets, but increasing the hash table
even more would be likely not worth it.

This also cleans up the code slightly by removing hard coded
magic numbers.

I didn't notice a big performance difference either way
on my Nehalem system, but I presume it'll help somewhat
on slower systems.

Signed-off-by: Andi Kleen 
Signed-off-by: Michal Marek

kconfig: new configuration interface (nconfig)

2010-02-02T13:33:55+00:00

This patch was inspired by the kernel projects page, where an ncurses
replacement for menuconfig was mentioned (by Sam Ravnborg).

Building on menuconfig, this patch implements a more modern look
interface using ncurses and ncurses' satellite libraries (menu, panel,
form). The implementation does not depend on lxdialog, which is
currently distributed with the kernel.

Signed-off-by: Nir Tzachar 
Signed-off-by: Michal Marek

kconfig: Mark various internal functions static

2009-11-15T23:00:16+00:00

kconfig's keyword hash, lexer, and parser define various functions used
only locally.  Declare these functions as static, and regenerate the
corresponding generated files.

Signed-off-by: Josh Triplett

kconfig: Make zconf.y work with current bison

2009-10-15T18:10:12+00:00

zconf.y includes zconf.hash.c from the initial code section.
zconf.hash.c references the token constants from zconf.y.  However,
current bison defines the token constants after the initial code
section, making zconf.hash.c fail to compile.  Move the include of
zconf.hash.c later in zconf.y, so bison puts it after the token
constants.

Signed-off-by: Josh Triplett

kconfig: add named choice group

2008-04-28T21:05:48+00:00

As choice dependency are now fully checked, it's quite easy to add support
for named choices. This lifts the restriction that a choice value can only
appear once, although it still has to be within the same group,
but multiple choices can be joined by giving them a name.
While at it I cleaned up a little the choice type logic to simplify it a
bit.

Signed-off-by: Roman Zippel 
Signed-off-by: Sam Ravnborg

kconfig: syntax cleanup - drop support for "depends/requires/def_boolean"

2007-10-12T19:20:32+00:00

Remove the following redundant and never or rarely used kconfig syntax:

- "def_boolean" (same as "def_bool")
- "requires" (same as "depends on")
- "depends" (same as "depends on")

This patch contains the code changes and Kconfig updates.
The shipped files are in next patch to let actual codechange stand out.

Signed-off-by: Adrian Bunk 
Cc: "Randy.Dunlap" 
Cc: Bryan Wu 
Cc: Paul Mackerras 
Cc: Benjamin Herrenschmidt 
Cc: Dmitry Torokhov 
Cc: "John W. Linville" 
Cc: Roman Zippel 
Cc: Richard Purdie 
Signed-off-by: Andrew Morton 
Signed-off-by: Sam Ravnborg