From: Manfred Spraul <manfred@colorfullife.com>
Date: Wed, 10 Dec 2008 17:17:06 +0000 (+0100)
Subject: lib/idr.c: Fix bug introduced by RCU fix
X-Git-Tag: v2.6.28-rc8~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=711a49a07f84f914aac26a52143f6e7526571143;p=pandora-kernel.git

lib/idr.c: Fix bug introduced by RCU fix

The last patch to lib/idr.c caused a bug if idr_get_new_above() was
called on an empty idr.

Usually, nodes stay on the same layer.  New layers are added to the top
of the tree.

The exception is idr_get_new_above() on an empty tree: In this case, the
new root node is first added on layer 0, then moved upwards.  p->layer
was not updated.

As usual: You shall never rely on the source code comments, they will
only mislead you.

Signed-off-by: Manfred Spraul <manfred@colorfullife.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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