Re: [PATCH] change name of rep_nop

From: Alan Cox (
Date: Tue Oct 09 2001 - 07:15:49 EST

> 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.

I am considering the possibility for the x86 ppro fix but firstly I want
to be sure the spin_unlock change is necessary. The PCI one is much less
of an impact since we don't go around doing it all the time.

> If anybody starts doing dynamic patching, please let me know so I can
> handle modutils and module_arch_init().

For testing purposes it won't be needed thankfully - a non nop patched
module might just be a tiny bit slower.

Anyway firstly I have to reasonably show PPro errata 66/92 are what is
causing the odd weird ppro crash (the evidence so far is the xchg
based unlock helps). The WC v UC misordered store one is a proven case,
as is the 0x70000000->0x7003FFFF wbinvd hang which turns up on some ppro
boxes that never got the bios E820 fixup

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This archive was generated by hypermail 2b29 : Mon Oct 15 2001 - 21:00:24 EST