Andi Kleen wrote:
> I don't see an explicit check in alternatives.c for the main kernel
> vs init sections and with CPU hotplug the alternatives can be applied
> arbitarily after the system has booted. So it would just stomp
> over the init text pages which are used for something else now.
very close to the end of the file:
alternatives_smp_module_add(NULL, "core kernel",
__smp_locks, __smp_locks_end,
_text, _etext);
The core kernel is just a "special" module (where we keep track of the
.text section boundaries too), and LOCKs outside the _text -> _etext
range are never ever patched.
cheers,
Gerd
--
Gerd Hoffmann <[email protected]>
http://www.suse.de/~kraxel/julika-dora.jpeg
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