On Tue, 27 Aug 2013, Geert Uytterhoeven wrote: > On Mon, Aug 26, 2013 at 10:44 PM, Christoph Lameter <cl@xxxxxxxxx> wrote: > > __get_cpu_var() is used for multiple purposes in the kernel source. One of them is > > address calculation via the form &__get_cpu_var(x). This calculates the address for > > the instance of the percpu variable of the current processor based on an offset. > > > > Others usage cases are for storing and retrieving data from the current processors percpu area. > > use cases > > > __get_cpu_var() always only does a address determination. However, store and retrieve operations > > an address > > > This patch converts __get_cpu_var into either and explicit address calculation using this_cpu_ptr() > > an explicit > > > 4. Retrieve the content of a percpu struct > > > > DEFINE_PER_CPU(struct mystruct, y); > > struct mystruct x = __get_cpu_var(y); > > > > Converts to > > > > memcpy(this_cpu_ptr(&y), x, sizeof(x)); > > Let's hope the actual code copies in the other direction ;-) Ok fixed that as well. -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
