From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760646AbcBYNRb (ORCPT ); Thu, 25 Feb 2016 08:17:31 -0500 Received: from verein.lst.de ([213.95.11.211]:48324 "EHLO newverein.lst.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760607AbcBYNRa (ORCPT ); Thu, 25 Feb 2016 08:17:30 -0500 Date: Thu, 25 Feb 2016 14:17:27 +0100 From: Torsten Duwe To: Michael Ellerman Cc: linuxppc-dev@ozlabs.org, bsingharora@gmail.com, linux-kernel@vger.kernel.org, rostedt@goodmis.org, kamalesh@linux.vnet.ibm.com, pmladek@suse.com, jeyu@redhat.com, jkosina@suse.cz, live-patching@vger.kernel.org, mbenes@suse.cz Subject: Re: [PATCH 02/12] powerpc/module: Mark module stubs with a magic value Message-ID: <20160225131727.GD21932@lst.de> References: <1456324115-21144-1-git-send-email-mpe@ellerman.id.au> <1456324115-21144-2-git-send-email-mpe@ellerman.id.au> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1456324115-21144-2-git-send-email-mpe@ellerman.id.au> User-Agent: Mutt/1.5.17 (2007-11-01) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Feb 25, 2016 at 01:28:25AM +1100, Michael Ellerman wrote: > > We can make that process easier by marking the generated stubs with a > magic value, and then looking for that magic value. Altough this is not > as rigorous as the current method, I believe it is sufficient in > practice. The actual magic value is sort of debatable; it should be "improbable" enough. But this can be changed easily, for each kernel compile, even. > Signed-off-by: Michael Ellerman Reviewed-by: Torsten Duwe [for reference:] > > +#define STUB_MAGIC 0x73747562 /* stub */ > + Torsten