core/rbtree: reorganize code in rb_erase() for additional changes
See kernel commit
16c047add3ceaf0ab882e3e094d1ec904d02312d
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First, move some code around in order to make the next change more
obvious.
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Wolfram Strepp <wstrepp@gmx.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Signed-off-by: Sylvain Munaut <tnt@246tNt.com>