On Fri, Aug 20, 2021 at 12:18:45PM -0500, Segher Boessenkool wrote: > On Fri, Aug 20, 2021 at 10:15:11PM +1000, Michael Ellerman wrote: > > Christophe Leroy <christophe.le...@csgroup.eu> writes: > > > Copied from commit 89bbe4c798bc ("powerpc/64: indirect function call > > > use bctrl rather than blrl in ret_from_kernel_thread") > > > > > > blrl is not recommended to use as an indirect function call, as it may > > > corrupt the link stack predictor. > > > > Do we know if any 32-bit CPUs have a link stack predictor or similar? > > 74xx do.
7450 and later, that is. Will I ever get that right, sigh. Segher