FTRACE_FILTER_SIZE
static char ftrace_notrace_buf[FTRACE_FILTER_SIZE] __initdata;
static char ftrace_filter_buf[FTRACE_FILTER_SIZE] __initdata;
strscpy(ftrace_notrace_buf, str, FTRACE_FILTER_SIZE);
strscpy(ftrace_filter_buf, str, FTRACE_FILTER_SIZE);
static char ftrace_graph_buf[FTRACE_FILTER_SIZE] __initdata;
static char ftrace_graph_notrace_buf[FTRACE_FILTER_SIZE] __initdata;
strscpy(ftrace_graph_buf, str, FTRACE_FILTER_SIZE);
strscpy(ftrace_graph_notrace_buf, str, FTRACE_FILTER_SIZE);