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	#define BT_TYPE_FREE 3 /* Available space. */			#define BT_TYPE_FREE 3 /* Available space. */
	#define BT_TYPE_BUSY 4 /* Used space. */			#define BT_TYPE_BUSY 4 /* Used space. */
	#define BT_TYPE_CURSOR 5 /* Cursor for nextfit allocations. */			#define BT_TYPE_CURSOR 5 /* Cursor for nextfit allocations. */
	#define BT_ISSPAN_P(bt) ((bt)->bt_type <= BT_TYPE_SPAN_STATIC)			#define BT_ISSPAN_P(bt) ((bt)->bt_type <= BT_TYPE_SPAN_STATIC)

	#define BT_END(bt) ((bt)->bt_start + (bt)->bt_size - 1)			#define BT_END(bt) ((bt)->bt_start + (bt)->bt_size - 1)

	#if defined(DIAGNOSTIC)			#if defined(DIAGNOSTIC)
	static int enable_vmem_check = 1;			static int enable_vmem_check = 0;
	SYSCTL_INT(_debug, OID_AUTO, vmem_check, CTLFLAG_RWTUN,			SYSCTL_INT(_debug, OID_AUTO, vmem_check, CTLFLAG_RWTUN,
	&enable_vmem_check, 0, "Enable vmem check");			&enable_vmem_check, 0, "Enable vmem check");
	static void vmem_check(vmem_t *);			static void vmem_check(vmem_t *);
	#endif			#endif

	static struct callout vmem_periodic_ch;			static struct callout vmem_periodic_ch;
	static int vmem_periodic_interval;			static int vmem_periodic_interval;
	static struct task vmem_periodic_wk;			static struct task vmem_periodic_wk;
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