From 6aab6dd37946d0d592105872bd533bb7d2931f3f Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Thu, 18 Jun 2015 17:23:34 -0400
Subject: [PATCH] ufs_trunc_branch(): massage towards killing recursion

We always have 0 < depth2 <= depth in there, so
if (--depth) {
	if (--depth2)
		A
	B
} else {
	C // not using depth2
}
D // not using depth2

is equivalent to

if (--depth2)
	A with s/depth/depth - 1/
if (--depth)
	B
else
	C
D

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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