stack_trace_filter_buf 542 kernel/trace/trace_stack.c static char stack_trace_filter_buf[COMMAND_LINE_SIZE+1] __initdata; stack_trace_filter_buf 549 kernel/trace/trace_stack.c strncpy(stack_trace_filter_buf, str + len, COMMAND_LINE_SIZE); stack_trace_filter_buf 575 kernel/trace/trace_stack.c if (stack_trace_filter_buf[0]) stack_trace_filter_buf 576 kernel/trace/trace_stack.c ftrace_set_early_filter(&trace_ops, stack_trace_filter_buf, 1);