On Sat, 2011-05-21 at 15:37 +1200, Michael Cree wrote: > While this is not a concern to the kernel (it obviously has access to > location 0) Not that obvious... dunno how you do your memory map on alpha but on most architectures, 0 is userspace even when you're in the kernel and is typically not mapped. Cheers, Ben. > I can imagine some neophyte thinking (as I have done myself) > "I'll look to see how the kernel implements lists and use that because > it will be both clever and well tested code" without realising that the > prefetch of a NULL is very inefficient for userspace! > > -- 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
