From: Torsten Duwe <duwe@lst.de>
To: Petr Mladek <pmladek@suse.com>
Cc: jeyu@redhat.com, jkosina@suse.cz, jikos@kernel.org,
linux-kernel@vger.kernel.org, rostedt@goodmis.org,
kamalesh@linux.vnet.ibm.com, linuxppc-dev@ozlabs.org,
live-patching@vger.kernel.org, mbenes@suse.cz
Subject: Re: [v5][PATCH] livepatch/ppc: Enable livepatching on powerpc
Date: Wed, 9 Mar 2016 18:26:29 +0100 [thread overview]
Message-ID: <20160309172629.GB27913@lst.de> (raw)
In-Reply-To: <20160309161025.GN10940@pathway.suse.cz>
On Wed, Mar 09, 2016 at 05:10:25PM +0100, Petr Mladek wrote:
> On Tue 2016-03-08 16:34:35, Torsten Duwe wrote:
> > /* compile using "-ffixed-r14"! */
> > register unsigned long pass_TOC asm("r14");
>
> BTW: Is this reentrant, please? I mean, is it possible to use this
> hack for two functions? Could the functions call each other?
Yes, it is. pass_TOC isn't really a global variable. It only lives
between the caller and the real function's return. With this notation
the task can easily be shifted to any other register.
Torsten
next prev parent reply other threads:[~2016-03-09 17:26 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-08 7:33 [v5][PATCH] livepatch/ppc: Enable livepatching on powerpc Balbir Singh
2016-03-08 10:45 ` Torsten Duwe
2016-03-08 13:52 ` Balbir Singh
2016-03-08 15:34 ` Torsten Duwe
2016-03-09 3:41 ` Balbir Singh
2016-03-09 16:10 ` Petr Mladek
2016-03-09 17:26 ` Torsten Duwe [this message]
2016-03-08 16:02 ` Petr Mladek
2016-03-09 3:37 ` Balbir Singh
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