commit 0735f7e5def2ab4158aac8d35f3661e8819dc232
author Ulf Magnusson <ulfalizer@gmail.com> Sun Oct 08 19:50:55 2017 +0200
committer Masahiro Yamada <yamada.masahiro@socionext.com> Mon Jan 22 00:49:28 2018 +0900
tree fcfa05a71fd849636b385af003b79d66b997296d
parent 05cccce580456d9b1a4548d9aba758856cac6455

kconfig: Document important expression functions

Many of these functions are quite the head scratchers if you don't know
what they're trying to do. Document them.

Also make it clear which functions rewrite expressions in-place and
which return new expressions. This prevents memory errors.

No functional changes. Only comments added.

Signed-off-by: Ulf Magnusson <ulfalizer@gmail.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>