Simon Arlott wrote: > 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. >
OK then, then VIA just masks the CPUID bit as opposed to the instruction. Point still holds. -hpa - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/