On Wed, Mar 4, 2015 at 12:39 PM, Ingo Molnar <[email protected]> wrote: > > * Andy Lutomirski <[email protected]> wrote: > >> On Wed, Mar 4, 2015 at 12:02 AM, Ingo Molnar <[email protected]> wrote: >> > >> > * Andy Lutomirski <[email protected]> wrote: >> > >> >> We currently store references to the top of the kernel stack in >> >> multiple places: kernel_stack (with an offset) and >> >> init_tss.x86_tss.sp0 (no offset). The latter is defined by hardware >> >> and is a clean canonical way to find the top of the stack. Add an >> > >> > Btw., 'per_cpu(init_tss)' is a somewhat misleading name these days, as >> > there's nothing 'init' about it anymore - we load it during CPU init >> > and then manually maintain its contents. A better name would be >> > 'current_tss' - referring to both the current CPU and the current >> > task? >> >> Hmm. That seems a little odd to me, since we never change the TSS >> pointer. It's certainly better than init_tss, though. I'll add a >> followup to rename it. > > Alternatively we could use 'cpu_tss': the CPU's current TSS.
I painted my bikeshed "singleton_tss", since cpu_tss seemed redundant for something that's already per cpu. If you prefer your bikeshed color, let me know. --Andy > > Thanks, > > Ingo -- Andy Lutomirski AMA Capital Management, LLC -- 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/
