linux-kernel - Re: [PATCH][v6][RFC] livepatch/ppc: Enable livepatching on powerpc

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Message-ID: <20160309100328.GB23039@lst.de>
Date:	Wed, 9 Mar 2016 11:03:28 +0100
From:	Torsten Duwe <duwe@....de>
To:	Petr Mladek <pmladek@...e.com>
Cc:	Balbir Singh <bsingharora@...il.com>, linuxppc-dev@...abs.org,
	linux-kernel@...r.kernel.org, rostedt@...dmis.org,
	kamalesh@...ux.vnet.ibm.com, jeyu@...hat.com, jkosina@...e.cz,
	live-patching@...r.kernel.org, mbenes@...e.cz
Subject: Re: [PATCH][v6][RFC] livepatch/ppc: Enable livepatching on powerpc

On Wed, Mar 09, 2016 at 10:44:23AM +0100, Petr Mladek wrote:
> find a solution that would work transparently. I mean that adding
> an extra hacks into selected functions in the patch might be quite
> error prone and problems hard to debug. I think that we all want this
> but I wanted to be sure :-)

Full ACK. Again, the TOC restore needs to go _after_ the replacement function,
and the klp_return_helper works as transparently as possible, so this
was my first choice. Arguments on the stack? I thought we'll deal with them
once we get there (e.g. _really_ need to patch a varargs function or one
with a silly signature).

	Torsten