tree 768e3a190df58b0f5f5d4a5c5ade925649e757dd
parent 7fe1e133bf45b0fe70491ed3d4c5b491feff7aa8
author David Woodhouse <dwmw2@infradead.org> 1145621717 +0100
committer David Woodhouse <dwmw2@infradead.org> 1145621717 +0100

[RBTREE] Change rbtree off-tree marking in I/O schedulers.

They were abusing the rb_color field to mark nodes which weren't currently
on the tree. Fix that to use the same method as eventpoll did -- setting
the parent pointer to point back to itself. And use the appropriate
accessor macros for setting and reading the parent.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>