diff options
author | Michel Lespinasse <walken@google.com> | 2012-10-08 16:31:11 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-10-09 16:22:37 +0900 |
commit | 46b6135a7402ac23c5b25f2bd79b03bab8f98278 (patch) | |
tree | 8430c191a455b1ff48c62229731ded4cbc71a9a1 /lib/fdt_rw.c | |
parent | 60670b8034d6e2ba860af79c9379b7788d09db73 (diff) |
rbtree: handle 1-child recoloring in rb_erase() instead of rb_erase_color()
An interesting observation for rb_erase() is that when a node has
exactly one child, the node must be black and the child must be red.
An interesting consequence is that removing such a node can be done by
simply replacing it with its child and making the child black,
which we can do efficiently in rb_erase(). __rb_erase_color() then
only needs to handle the no-childs case and can be modified accordingly.
Signed-off-by: Michel Lespinasse <walken@google.com>
Acked-by: Rik van Riel <riel@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib/fdt_rw.c')
0 files changed, 0 insertions, 0 deletions