* David Rientjes <rient...@google.com> wrote: > On Thu, 21 Mar 2013, Ingo Molnar wrote: > > > > Index: linux/mm/page_alloc.c > > > =================================================================== > > > --- linux.orig/mm/page_alloc.c 2013-03-18 10:52:11.510988843 -0500 > > > +++ linux/mm/page_alloc.c 2013-03-18 10:52:14.214931348 -0500 > > > @@ -4161,10 +4161,19 @@ int __meminit __early_pfn_to_nid(unsigne > > > { > > > unsigned long start_pfn, end_pfn; > > > int i, nid; > > > + static unsigned long last_start_pfn, last_end_pfn; > > > + static int last_nid; > > > > Please move these globals out of function local scope, to make it more > > apparent that they are not on-stack. I only noticed it in the second pass. > > The way they're currently defined places these in meminit.data as > appropriate; if they are moved out, please make sure to annotate their > definitions with __meminitdata.
I'm fine with having them within the function as well in this special case, as long as a heavy /* NOTE: ... */ warning is put before them - which explains why these SMP-unsafe globals are safe. ( That warning will also act as a visual delimiter that breaks the normally confusing and misleading 'globals mixed amongst stack variables' pattern. ) Thanks, Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/