ftrace_return_address 630 include/linux/ftrace.h #ifndef ftrace_return_address ftrace_return_address 639 include/linux/ftrace.h #define CALLER_ADDR1 ((unsigned long)ftrace_return_address(1)) ftrace_return_address 640 include/linux/ftrace.h #define CALLER_ADDR2 ((unsigned long)ftrace_return_address(2)) ftrace_return_address 641 include/linux/ftrace.h #define CALLER_ADDR3 ((unsigned long)ftrace_return_address(3)) ftrace_return_address 642 include/linux/ftrace.h #define CALLER_ADDR4 ((unsigned long)ftrace_return_address(4)) ftrace_return_address 643 include/linux/ftrace.h #define CALLER_ADDR5 ((unsigned long)ftrace_return_address(5)) ftrace_return_address 644 include/linux/ftrace.h #define CALLER_ADDR6 ((unsigned long)ftrace_return_address(6))