18 		int (*fn)(struct stackframe *frame, void *data),  in walk_stackframe()  argument
30 		struct stackframe frame;  in walk_stackframe()  local
40 		frame.pc = MAKE_PC_FROM_RA(a0, a1);  in walk_stackframe()
41 		frame.sp = a1;  in walk_stackframe()
43 		if (fn(&frame, data))  in walk_stackframe()
55 static int stack_trace_cb(struct stackframe *frame, void *data)  in stack_trace_cb()  argument
64 	if (!kernel_text_address(frame->pc))  in stack_trace_cb()
67 	trace->entries[trace->nr_entries++] = frame->pc;  in stack_trace_cb()
96 static int return_address_cb(struct stackframe *frame, void *data)  in return_address_cb()  argument
104 	if (!kernel_text_address(frame->pc))  in return_address_cb()
106 	r->addr = frame->pc;  in return_address_cb()