On Wed, May 11, 2022 at 02:05:27PM +0200, Heiko Carstens wrote: > Since the minimum architecture level has been raised to z10 a shorter > instruction sequence can be used to implement the OUTSIDE macro. This > also reduces the number of used registers within that macro to one. > > Signed-off-by: Heiko Carstens <hca@xxxxxxxxxxxxx> > --- > arch/s390/kernel/entry.S | 8 +++----- > 1 file changed, 3 insertions(+), 5 deletions(-) > > diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S > index a6b45eaa3450..e1664b45090f 100644 > --- a/arch/s390/kernel/entry.S > +++ b/arch/s390/kernel/entry.S > @@ -169,11 +169,9 @@ _LPP_OFFSET = __LC_LPP > * @outside_label: jump here if @reg is outside of [@start..@end) > */ > .macro OUTSIDE reg,start,end,outside_label > - lgr %r14,\reg > - larl %r13,\start > - slgr %r14,%r13 > - lghi %r13,\end - \start > - clgr %r14,%r13 > + larl %r14,\start > + slgrk %r14,\reg,%r14 > + clgfi %r14,\end - \start Clever me.. slgrk was added with z196, and not z10. So dropping this patch.
