Warning: include/linux/ftrace.h:900 No description found for return value of 'ftrace_make_nop'
Warning: include/linux/ftrace.h:942 No description found for return value of 'ftrace_init_nop'
Warning: include/linux/ftrace.h:967 No description found for return value of 'ftrace_make_call'
Warning: include/linux/ftrace.h:997 No description found for return value of 'ftrace_modify_call'
Warning: include/linux/ftrace.h:897 No description found for return value of 'ftrace_make_nop'
Warning: include/linux/ftrace.h:939 No description found for return value of 'ftrace_init_nop'
Warning: include/linux/ftrace.h:964 No description found for return value of 'ftrace_make_call'
Warning: include/linux/ftrace.h:994 No description found for return value of 'ftrace_modify_call'