Extern or forward variable declaration at include/linux/clocksource.h, line 24 References: drivers/net/ethernet/intel/i40e/i40e_debugfs.c, line 1507 drivers/net/ethernet/intel/i40e/i40e_debugfs.c, line 1513 drivers/net/ethernet/intel/i40e/i40e_debugfs.c, line 1515 drivers/net/ethernet/intel/i40e/i40e_debugfs.c, line 1549 drivers/net/ethernet/intel/i40e/i40e_debugfs.c, line 1559 include/linux/clocksource.h, line 24 include/linux/clocksource.h, line 109 kernel/trace/ftrace.c, line 1314 kernel/trace/ftrace.c, line 1388 kernel/trace/ftrace.c, line 1399 kernel/trace/ftrace.c, line 1399 kernel/trace/ftrace.c, line 1402 kernel/trace/ftrace.c, line 2579 kernel/trace/ftrace.c, line 2991 kernel/trace/ftrace.c, line 3347 kernel/trace/ftrace.c, line 3933 kernel/trace/ftrace.c, line 3942 kernel/trace/ftrace.c, line 3952 kernel/trace/ftrace.c, line 3967 kernel/trace/ftrace.c, line 3967 kernel/trace/ftrace.c, line 3984 kernel/trace/ftrace.c, line 3988 kernel/trace/ftrace.c, line 4025 kernel/trace/ftrace.c, line 4099 kernel/trace/ftrace.c, line 4116 kernel/trace/ftrace.c, line 4120 kernel/trace/ftrace.c, line 5576 kernel/trace/ftrace.c, line 5732 kernel/trace/ftrace.c, line 5787 kernel/trace/ftrace.c, line 5858 kernel/trace/trace.c, line 126 kernel/trace/trace.c, line 5059 kernel/trace/trace.c, line 5116 kernel/trace/trace.c, line 5120 kernel/trace/trace.c, line 7961 kernel/trace/trace.c, line 7977 kernel/trace/trace.c, line 8005 kernel/trace/trace.c, line 8011 kernel/trace/trace.h, line 780 kernel/trace/trace_kprobe.c, line 67 kernel/trace/trace_kprobe.c, line 571 kernel/trace/trace_printk.c, line 89