/root/opemu-linux/opemu.c: In function ‘retrieve_reg’:
/root/opemu-linux/opemu.c:254:31: error: ‘const struct pt_regs’ has no member named ‘r8’
  254 |                 *where = ss64 -> r8;
      |                               ^~
/root/opemu-linux/opemu.c:262:31: error: ‘const struct pt_regs’ has no member named ‘r9’
  262 |                 *where = ss64 -> r9;
      |                               ^~
/root/opemu-linux/opemu.c:270:31: error: ‘const struct pt_regs’ has no member named ‘r10’
  270 |                 *where = ss64 -> r10;
      |                               ^~
/root/opemu-linux/opemu.c:278:31: error: ‘const struct pt_regs’ has no member named ‘r11’
  278 |                 *where = ss64 -> r11;
      |                               ^~
/root/opemu-linux/opemu.c:286:31: error: ‘const struct pt_regs’ has no member named ‘r12’
  286 |                 *where = ss64 -> r12;
      |                               ^~
/root/opemu-linux/opemu.c:294:31: error: ‘const struct pt_regs’ has no member named ‘r13’
  294 |                 *where = ss64 -> r13;
      |                               ^~
/root/opemu-linux/opemu.c:302:31: error: ‘const struct pt_regs’ has no member named ‘r14’
  302 |                 *where = ss64 -> r14;
      |                               ^~
/root/opemu-linux/opemu.c:310:31: error: ‘const struct pt_regs’ has no member named ‘r15’
  310 |                 *where = ss64 -> r15;
      |                               ^~
/root/opemu-linux/opemu.c: In function ‘store_reg’:
/root/opemu-linux/opemu.c:698:17: error: ‘struct pt_regs’ has no member named ‘r8’
  698 |             ss64->r8 = what;
      |                 ^~
/root/opemu-linux/opemu.c:702:17: error: ‘struct pt_regs’ has no member named ‘r9’
  702 |             ss64->r9 = what;
      |                 ^~
/root/opemu-linux/opemu.c:706:17: error: ‘struct pt_regs’ has no member named ‘r10’
  706 |             ss64->r10 = what;
      |                 ^~
/root/opemu-linux/opemu.c:710:17: error: ‘struct pt_regs’ has no member named ‘r11’
  710 |             ss64->r11 = what;
      |                 ^~
/root/opemu-linux/opemu.c:714:17: error: ‘struct pt_regs’ has no member named ‘r12’
  714 |             ss64->r12 = what;
      |                 ^~
/root/opemu-linux/opemu.c:718:17: error: ‘struct pt_regs’ has no member named ‘r13’
  718 |             ss64->r13 = what;
      |                 ^~
/root/opemu-linux/opemu.c:722:17: error: ‘struct pt_regs’ has no member named ‘r14’
  722 |             ss64->r14 = what;
      |                 ^~
/root/opemu-linux/opemu.c:726:17: error: ‘struct pt_regs’ has no member named ‘r15’
  726 |             ss64->r15 = what;
      |                 ^~
make[2]: *** [scripts/Makefile.build:289: /root/opemu-linux/opemu.o] Error 1
make[1]: *** [Makefile:1907: /root/opemu-linux] Error 2
make[1]: Leaving directory '/mnt/sdb1/linux-5.15.151'
make: *** [Makefile:15: all] Error 2