commit aa27023c941f88da383e8f2eeec2a81312243e6e

Author: Frank Ch. Eigler <fche@redhat.com>

Date:   Fri Mar 11 10:29:55 2022 -0500

    sys/sdt.h: set x86-64 STAP_SDT_ASM_CONSTRAINT back to "nor"

    It turns out the kernel and some other sdt consumers haven't learned

    how to use %xmm registers in sdt operands.  So under this duress, stap

    will go back to the old school integer register set "nor" as a

    default.  We'll revisit this in the future, though this egg might not

    turn into a chicken.

    https://bugzilla.redhat.com/show_bug.cgi?id=2058908

diff --git a/includes/sys/sdt.h b/includes/sys/sdt.h

index 48cb7263f..ca0162b4d 100644

--- a/includes/sys/sdt.h

+++ b/includes/sys/sdt.h

@@ -100,8 +100,6 @@

 # ifndef STAP_SDT_ARG_CONSTRAINT

 # if defined __powerpc__

 # define STAP_SDT_ARG_CONSTRAINT        nZr

-# elif defined __x86_64__

-# define STAP_SDT_ARG_CONSTRAINT norx

 # else

 # define STAP_SDT_ARG_CONSTRAINT        nor

 # endif