On Thu, Feb 25, 2016 at 01:28:31AM +1100, Michael Ellerman wrote: > The main change is to just use paca->kernel_toc, rather than a branch to > +4 and mflr etc. That makes the code simpler and should also perform > better. Indeed. > There was also a sequence after ftrace_call() where we load from > pt_regs->nip, move to LR, then a few instructions later load from LRSAVE > and move to LR. Instead I think we want to put pt_regs->nip into CTR and > branch to it later. Yes, I did some of this cleanup in the livepatch implementation. > We also rework some of the SPR loads to hopefully speed them up a bit. > Also comment the asm much more, to hopefully make it clearer. > > Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx> Reviewed-by: Torsten Duwe <duwe@xxxxxxx> Torsten -- To unsubscribe from this list: send the line "unsubscribe live-patching" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
