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On Jan 7, 2004, at 3:21 AM, Steve Woodford wrote:

> I've been meaning to commit just such a macro <sys/cdefs.h> to fix a
> similar issue elsewhere. Something along the lines of:
>
> #define __reorder_barrier()     __asm __volatile("":::"memory")
>
> If there are no objections, I'll go ahead and do this.

Since it prevents instruction reordering, I guess __insn_barrier() is 
better.  Provide a means for <machine/cdefs.h> to override it, so SPARC 
can continue using it's no-memory-clobber version.

         -- Jason R. Thorpe <thorpej@wasabisystems.com>


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