extern void libcfs_register_panic_notifier(void);
extern void libcfs_unregister_panic_notifier(void);
extern int libcfs_panic_in_progress;
-extern int cfs_trace_max_debug_mb(void);
#define TCD_MAX_PAGES (5 << (20 - PAGE_SHIFT))
#define TCD_STOCK_PAGES (TCD_MAX_PAGES)