On Fri, Jun 13, 2014 at 12:10:36PM -0500, Christoph Lameter wrote: > On Thu, 12 Jun 2014, Tejun Heo wrote: > > > Currently, archs can override raw_cpu_ptr() directly; however, we > > wanna build a layer of indirection in the generic part of percpu so > > that we can implement generic features there without affecting archs. > > Not sure why one would do this. We already have this_cpu_ptr() (arch > independant) and the lower level raw_cpu_ptr() which can be modified by > the arch code.
So that there's separate between generic part of definition and arch-specific part. This allows the generic portion of definition to be handled in the generic code. e.g. arch no longer has to worry about verifying arguments or having a data dependency barrier. It just has to worry about the core implementation. The generic layer can handle the boilerplates. Thanks. -- tejun -- 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/
