From: Tiejun Chen <tiejun.chen@windriver.com>
Date: Wed, 22 Aug 2012 16:10:20 +0000 (+0000)
Subject: powerpc/kgdb: Restore current_thread_info properly
X-Git-Tag: v3.6-rc4~13^2~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5f630401f9e98bd062733b5bbef096dbf2158066;p=pandora-kernel.git

powerpc/kgdb: Restore current_thread_info properly

For powerpc BooKE and e200, singlestep is handled on the critical/dbg
exception stack. This causes current_thread_info() to fail for kgdb
internal, so previously We work around this issue by copying
the thread_info from the kernel stack before calling kgdb_handle_exception,
and copying it back afterwards.

But actually we don't do this properly. We should backup current_thread_info
then restore that when exit.

Signed-off-by: Tiejun Chen <tiejun.chen@windriver.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---

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