On 17/05/07 21:15, H. Peter Anvin wrote:
Simon Arlott wrote:
Is it automatic? I have CONFIG_X86_CMPXCHG=y without cx8 showing in
cpuinfo, and it appears to work fine.
Will your changes needlessly prevent the kernel running? Would I be
right in thinking that the kernel is successfully using cmpxchg even
though it's considered disabled? I realise people compile kernels for
the wrong CPU but preventing them working when it's been chosen
correctly seems wrong.
CX8 isn't cmpxchg; it's cmpxchg8b.
Ok, but I have CONFIG_X86_CMPXCHG64=y too.
--
Simon Arlott
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