59 	if (s->fbuf && s->fbuf->syscall_trace_enabled &&  in get_fbuf()
60 	    !s->fbuf->syscall_trace_suspended)  in get_fbuf()
61 		return s->fbuf;  in get_fbuf()
69 static void __noprof add_elem(struct ftrace_buf *fbuf, uint8_t level,  in add_elem()  argument
73 	size_t idx = fbuf->curr_idx;  in add_elem()
78 	elem = (uint64_t *)((vaddr_t)fbuf + fbuf->buf_off) + idx;  in add_elem()
82 	if ((idx + 1) * sizeof(*elem) > fbuf->max_size) {  in add_elem()
84 		fbuf->overflow = true;  in add_elem()
87 	fbuf->curr_idx = idx;  in add_elem()
93 	struct ftrace_buf *fbuf = get_fbuf();  in ftrace_enter()  local
95 	if (!fbuf || !fbuf->buf_off || !fbuf->max_size)  in ftrace_enter()
98 	add_elem(fbuf, fbuf->ret_idx + 1, pc);  in ftrace_enter()
100 	if (fbuf->ret_idx < FTRACE_RETFUNC_DEPTH) {  in ftrace_enter()
101 		fbuf->ret_stack[fbuf->ret_idx] = *lr;  in ftrace_enter()
102 		fbuf->begin_time[fbuf->ret_idx] = now;  in ftrace_enter()
103 		fbuf->ret_idx++;  in ftrace_enter()
122 	struct ftrace_buf *fbuf = get_fbuf();  in ftrace_return()  local
127 	if (!fbuf || !fbuf->ret_idx || fbuf->ret_idx > FTRACE_RETFUNC_DEPTH)  in ftrace_return()
130 	fbuf->ret_idx--;  in ftrace_return()
131 	start = fbuf->begin_time[fbuf->ret_idx];  in ftrace_return()
133 	add_elem(fbuf, 0, elapsed);  in ftrace_return()
135 	return fbuf->ret_stack[fbuf->ret_idx];  in ftrace_return()