11787 Kernel needs to be built with retpolines
11788 Kernel needs to generally use RSB stuffing
Reviewed by: Jerry Jelinek <jerry.jelinek@joyent.com>
Reviewed by: John Levon <john.levon@joyent.com>

*** 18,27 ****
--- 18,28 ----
   *
   * CDDL HEADER END
   */
  /*
   * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
+  * Copyright 2019 Joyent, Inc.
   */
  
  #include <sys/asm_linkage.h>
  #include <sys/asm_misc.h>
  #include <sys/regset.h>
*** 758,771 ****
          /*
           * skip iff function pointer is NULL
           */
          cmpq    $0, ap_mlsetup
          je      3f
!         call    *ap_mlsetup
  3:
  
!         call    *cpr_start_cpu_func
  
  / restore %rbx to the value it ahd before we called the functions above
          movq    rm_platter_va, %rbx
          addq    $WC_CPU, %rbx
  
--- 759,774 ----
          /*
           * skip iff function pointer is NULL
           */
          cmpq    $0, ap_mlsetup
          je      3f
!         leaq    ap_mlsetup, %rax
!         INDIRECT_CALL_REG(rax)
  3:
  
!         leaq    cpr_start_cpu_func, %rax
!         INDIRECT_CALL_REG(rax)
  
  / restore %rbx to the value it ahd before we called the functions above
          movq    rm_platter_va, %rbx
          addq    $WC_CPU, %rbx