You can see linux/Documentation/memory_barriers.txt about barriers in common
i think, that specific definition of __memory_barrier depend on architecture. What file did you found this definition in?
2011/3/6 loody <miloody@xxxxxxxxx>
hi all:
I grep kernel source and found cpu_relax is defined as
__memory_barrier(), which seems not defined in kernel source.
At beginning I think it may be the gcc build-in functions, but I
cannot find in the gcc document.
Where and what is that used for?
--
Regards,
miloody
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