Messages in this thread |  | | From | Benjamin Herrenschmidt <> | Subject | Re: [PATCH] change name of rep_nop | Date | Tue, 9 Oct 2001 14:13:22 +0200 |
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>>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.
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