include/linux/ftrace.h:154: warning: cannot understand function prototype: 'struct ftrace_regs ' include/linux/ftrace.h:839: warning: No description found for return value of 'ftrace_make_nop' include/linux/ftrace.h:881: warning: No description found for return value of 'ftrace_init_nop' include/linux/ftrace.h:906: warning: No description found for return value of 'ftrace_make_call' include/linux/ftrace.h:936: warning: No description found for return value of 'ftrace_modify_call' include/linux/ftrace.h:1218: warning: Function parameter or struct member 'kill_ftrace_graph' not described in 'DECLARE_STATIC_KEY_FALSE' include/linux/ftrace.h:1218: warning: expecting prototype for ftrace_graph_is_dead(). Prototype was for DECLARE_STATIC_KEY_FALSE() instead include/linux/ftrace.h:154: warning: cannot understand function prototype: 'struct ftrace_regs ' include/linux/ftrace.h:856: warning: No description found for return value of 'ftrace_make_nop' include/linux/ftrace.h:898: warning: No description found for return value of 'ftrace_init_nop' include/linux/ftrace.h:923: warning: No description found for return value of 'ftrace_make_call' include/linux/ftrace.h:953: warning: No description found for return value of 'ftrace_modify_call' include/linux/ftrace.h:1235: warning: Function parameter or struct member 'kill_ftrace_graph' not described in 'DECLARE_STATIC_KEY_FALSE' include/linux/ftrace.h:1235: warning: expecting prototype for ftrace_graph_is_dead(). Prototype was for DECLARE_STATIC_KEY_FALSE() instead