tree be1f3abb2f83fb20997ffcf770441610114bbf3f
parent 5bee17f18b595937e6beafeee5197868a3f74a06
author Sam Ravnborg <sam@ravnborg.org> 1237111512 +0100
committer Sam Ravnborg <sam@ravnborg.org> 1237154097 +0100

kconfig: fix randconfig for choice blocks

Ingo Molnar reported that 'make randconfig' was not covering
choice blocks properly, resulting in certain config options
being left out of randconfig testing altogether.

With the following patch we:
- properly randomize choice value for normal choice blocks
- properly randomize for multi choice blocks
- added several comments to explain what is going on

The root cause of the bug was that SYMBOL_VALID was set on the
symbol representing the choice block so clearing this did
the trick initially.
But testign revealed a few more issues that is now fixed.

Reported-by: Ingo Molnar <mingo@elte.hu>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>