13902 Fix for 13717 may break 8-disk raidz2
13915 installctx() blocking allocate causes problems
Portions contributed by: Jerry Jelinek <gjelinek@gmail.com>
Change-Id: I934d69946cec42630fc541fa8c7385b862b69ca2

*** 18,27 ****
--- 18,28 ----
   *
   * CDDL HEADER END
   */
  /*
   * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+  * Copyright 2021 Joyent, Inc.
   */
  
  /*
   * sun4u common CPC subroutines.
   */
*** 92,102 ****
  
          if (kcpc_counts_include_idle)
                  return;
  
          installctx(t, cp, kcpc_idle_save, kcpc_idle_restore, NULL, NULL,
!             NULL, NULL);
  }
  
  /*
   * Examine the processor and load an appropriate PCBE.
   */
--- 93,103 ----
  
          if (kcpc_counts_include_idle)
                  return;
  
          installctx(t, cp, kcpc_idle_save, kcpc_idle_restore, NULL, NULL,
!             NULL, NULL, NULL);
  }
  
  /*
   * Examine the processor and load an appropriate PCBE.
   */