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From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Keith Owens <kaos@ocs.com.au>, <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] change name of rep_nop
Date: Tue, 9 Oct 2001 14:13:22 +0200	[thread overview]
Message-ID: <20011009121322.2426@smtp.adsl.oleane.com> (raw)
In-Reply-To: <30619.1002627002@ocs3.intra.ocs.com.au>
In-Reply-To: <30619.1002627002@ocs3.intra.ocs.com.au>

>>One approach we take on PPC that you may or may not like for this is
>>dynamic patching.
>
>BIG RED WARNING: Anybody thinking of using dynamic patching must
>consider modules as well as the kernel.  modutils 2.4.8 added support
>for ppc archdata to allow dynamic patching of modules using the ftr
>data.  There also has to be code in kernel/module.c::module_arch_init()
>to take the archdata and do whatever is required.
>
>If anybody starts doing dynamic patching, please let me know so I can
>handle modutils and module_arch_init().

Yes, definitely an issue. The mecanism we used on PPC was so specific
to some low-level arch asm code that modules were a non-issue... until
some of that critical code ended up beeing inlined.

Ben.



  reply	other threads:[~2001-10-09 12:13 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2001-10-05 10:46 Paul Mackerras
2001-10-05 14:37 ` Alan Cox
2001-10-05 18:06   ` Peter Rival
2001-10-05 23:28   ` Paul Mackerras
2001-10-05 23:54     ` Martin J. Bligh
2001-10-06  1:40     ` Paul Mackerras
2001-10-08 19:27       ` Peter Rival
2001-10-08 22:36       ` David Woodhouse
2001-10-08 22:49         ` Alan Cox
2001-10-08 23:06         ` David Woodhouse
2001-10-08 23:42           ` David Woodhouse
2001-10-08 23:46           ` David S. Miller
2001-10-08 23:08         ` David S. Miller
2001-10-08 23:46         ` Linus Torvalds
2001-10-09  0:03           ` David Woodhouse
2001-10-08 22:46       ` David S. Miller
2001-10-08 23:16         ` Alan Cox
2001-10-08 23:24           ` Dave Jones
2001-10-08 23:33             ` Alan Cox
2001-10-09  5:01             ` George Greer
2001-10-08 23:30           ` David S. Miller
2001-10-09 10:33           ` Benjamin Herrenschmidt
2001-10-09 11:30             ` Keith Owens
2001-10-09 12:13               ` Benjamin Herrenschmidt [this message]
2001-10-09 12:15               ` Alan Cox
2001-10-09  8:51 Etienne Lorrain
2001-10-09 11:30 ` Alan Cox

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