arch/s390/include/asm/livepatch.h

   1 /*
   2  * livepatch.h - s390-specific Kernel Live Patching Core
   3  *
   4  *  Copyright (c) 2013-2015 SUSE
   5  *   Authors: Jiri Kosina
   6  *            Vojtech Pavlik
   7  *            Jiri Slaby
   8  */
   9
  10 /*
  11  * This program is free software; you can redistribute it and/or modify it
  12  * under the terms of the GNU General Public License as published by the Free
  13  * Software Foundation; either version 2 of the License, or (at your option)
  14  * any later version.
  15  */
  16
  17 #ifndef ASM_LIVEPATCH_H
  18 #define ASM_LIVEPATCH_H
  19
  20 #include <linux/module.h>
  21
  22 #ifdef CONFIG_LIVEPATCH
  23 static inline int klp_check_compiler_support(void)
  24 {
  25         return 0;
  26 }
  27
  28 static inline int klp_write_module_reloc(struct module *mod, unsigned long
  29                 type, unsigned long loc, unsigned long value)
  30 {
  31         /* not supported yet */
  32         return -ENOSYS;
  33 }
  34
  35 static inline void klp_arch_set_pc(struct pt_regs *regs, unsigned long ip)
  36 {
  37         regs->psw.addr = ip;
  38 }
  39 #else
  40 #error Live patching support is disabled; check CONFIG_LIVEPATCH
  41 #endif
  42
  43 #endif