54 	unsigned long kstack_ptr = current->lowest_stack;  in stackleak_erase()  local
63 	if (unlikely(kstack_ptr - boundary >= THREAD_SIZE))  in stackleak_erase()
64 		kstack_ptr = boundary;  in stackleak_erase()
67 	while (kstack_ptr > boundary && poison_count <= depth) {  in stackleak_erase()
68 		if (*(unsigned long *)kstack_ptr == STACKLEAK_POISON)  in stackleak_erase()
73 		kstack_ptr -= sizeof(unsigned long);  in stackleak_erase()
80 	if (kstack_ptr == boundary)  in stackleak_erase()
81 		kstack_ptr += sizeof(unsigned long);  in stackleak_erase()
84 	current->prev_lowest_stack = kstack_ptr;  in stackleak_erase()
97 	while (kstack_ptr < boundary) {  in stackleak_erase()
98 		*(unsigned long *)kstack_ptr = STACKLEAK_POISON;  in stackleak_erase()
99 		kstack_ptr += sizeof(unsigned long);  in stackleak_erase()