On Thu, 19 Mar 2015 11:33:30 -0500 (CDT) Christoph Lameter <[email protected]> wrote:
> If you are redoing it then please get the comments a bit cleared up. The What comments should I clear up? This version did not have a comment. It just switched this_cpu_* to __this_cpu_*, and also updated a variable algorithm. -- Steve > heaviness of the fallback version of this_cpu_read/write can usually > easily be remedied by arch specific definitions. The per cpu > offset is somewhere in a register and one needs to define a macro that > creates an instruction that does a fetch from that register plus > the current offset into the area that is needed. This is similarly easy > for the write path. But then its often easier to just use the __this_cpu > instructions since preemption is often off in these code paths. > > I have had code for IA64 in the past that does this. -- 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/
