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 <[email protected]> > 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 > > _______________________________________________ > Kernelnewbies mailing list > [email protected] > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies >
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