text: #include <linux/device.h>
  #include <asm/mce.h>
  
  enum severity_level {
  	MCE_NO_SEVERITY,
  	MCE_DEFERRED_SEVERITY,
  	MCE_UCNA_SEVERITY = MCE_DEFERRED_SEVERITY,
  	MCE_KEEP_SEVERITY,
  	MCE_SOME_SEVERITY,
  	MCE_AO_SEVERITY,
  	MCE_UC_SEVERITY,
  	MCE_AR_SEVERITY,
  	MCE_PANIC_SEVERITY,
  };
  
  extern struct atomic_notifier_head x86_mce_decoder_chain;
  
  #define ATTR_LEN		16
  #define INITIAL_CHECK_INTERVAL	5 * 60 /* 5 minutes */
  
  /* One object for each MCE bank, shared by all CPUs */
  struct mce_bank {
  	u64			ctl;			/* subevents to enable */
  	unsigned char init;				/* initialise bank? */
  	struct device_attribute attr;			/* device attribute */
  	char			attrname[ATTR_LEN];	/* attribute name */
  };
  
  struct mce_evt_llist {
  	struct llist_node llnode;
  	struct mce mce;
  };
  
  void mce_gen_pool_process(void);
  bool mce_gen_pool_empty(void);
  int mce_gen_pool_add(struct mce *mce);
  int mce_gen_pool_init(void);
  struct llist_node *mce_gen_pool_prepare_records(void);
  
  extern int (*mce_severity)(struct mce *a, int tolerant, char **msg, bool is_excp);
  struct dentry *mce_get_debugfs_dir(void);
  
  extern struct mce_bank *mce_banks;
  extern mce_banks_t mce_banks_ce_disabled;
  
  #ifdef CONFIG_X86_MCE_INTEL
  unsigned long cmci_intel_adjust_timer(unsigned long interval);
  bool mce_intel_cmci_poll(void);
  void mce_intel_hcpu_update(unsigned long cpu);
  void cmci_disable_bank(int bank);
  #else
  # define cmci_intel_adjust_timer mce_adjust_timer_default
  static inline bool mce_intel_cmci_poll(void) { return false; }
  static inline void mce_intel_hcpu_update(unsigned long cpu) { }
  static inline void cmci_disable_bank(int bank) { }
  #endif
  
  void mce_timer_kick(unsigned long interval);
  
  #ifdef CONFIG_ACPI_APEI
  int apei_write_mce(struct mce *m);
  ssize_t apei_read_mce(struct mce *m, u64 *record_id);
  int apei_check_mce(void);
  int apei_clear_mce(u64 record_id);
  #else
  static inline int apei_write_mce(struct mce *m)
  {
  	return -EINVAL;
  }
  static inline ssize_t apei_read_mce(struct mce *m, u64 *record_id)
  {
  	return 0;
  }
  static inline int apei_check_mce(void)
  {
  	return 0;
  }
  static inline int apei_clear_mce(u64 record_id)
  {
  	return -EINVAL;
  }
  #endif
  
  void mce_inject_log(struct mce *m);
  
  /*
   * We consider records to be equivalent if bank+status+addr+misc all match.
   * This is only used when the system is going down because of a fatal error
   * to avoid cluttering the console log with essentially repeated information.
   * In normal processing all errors seen are logged.
   */
  static inline bool mce_cmp(struct mce *m1, struct mce *m2)
  {
  	return m1->bank != m2->bank ||
  		m1->status != m2->status ||
  		m1->addr != m2->addr ||
  		m1->misc != m2->misc;
  }
  