Re: [BUG] Variable stopmachine_state should be volatile

[Christoph Hellwig]

> You are right. I hit the problem when I compiled kernel 2.6.9 on IA64 by intel compiler.
> cpu_relax has the compiler barrier if we use gcc, but cpu_relax becomes just ia64_hint which is null when I use intel compiler to compile kernel on ia64. file include/asm-ia64/intel_intrin.h defines ia64_hint as null.

Please report all bugs using ICC to intel.  We can't and don't want to debug
this mess.

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