| 1234567891011121314151617 | #define L1_SCRATCH_START	0xFFB00000/* Data that is "mapped" into the process VM at the start of the L1 scratch   memory, so that each process can access it at a fixed address.  Used for   stack checking.  */struct l1_scratch_task_info{	/* Points to the start of the stack.  */	void *stack_start;	/* Not updated by the kernel; a user process can modify this to	   keep track of the lowest address of the stack pointer during its	   runtime.  */	void *lowest_sp;};/* A pointer to the structure in memory.  */#define L1_SCRATCH_TASK_INFO ((struct l1_scratch_task_info *)L1_SCRATCH_START)
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