From: Li Zhong <zhong@linux.vnet.ibm.com>
Date: Mon, 6 May 2013 22:44:41 +0000 (+0000)
Subject: powerpc: Fix MAX_STACK_TRACE_ENTRIES too low warning again
X-Git-Tag: v3.10-rc2~31^2~14
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=af945cf4bfc6586f0739b8c7f67af75576dec25e;p=pandora-kernel.git

powerpc: Fix MAX_STACK_TRACE_ENTRIES too low warning again

Saw this warning again, and this time from the ret_from_fork path.

It seems we could clear the back chain earlier in copy_thread(), which
could cover both path, and also fix potential lockdep usage in
schedule_tail(), or exception occurred before we clear the back chain.

Signed-off-by: Li Zhong <zhong@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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