linux-kernel - Re: [PATCH v4] ftrace: support early boot function tracing

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Message-ID: <201812100620.RQbAtHXt%fengguang.wu@intel.com>
Date:   Mon, 10 Dec 2018 06:05:27 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Abderrahmane Benbachir <abderrahmane.benbachir@...ymtl.ca>
Cc:     kbuild-all@...org, rostedt@...dmis.org,
        linux-kernel@...r.kernel.org, peterz@...radead.org,
        mingo@...hat.com, mathieu.desnoyers@...icios.com,
        abderb@...rosoft.com
Subject: Re: [PATCH v4] ftrace: support early boot function tracing

Hi Abderrahmane,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on tip/perf/core]
[also build test ERROR on v4.20-rc5 next-20181207]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Abderrahmane-Benbachir/ftrace-support-early-boot-function-tracing/20181209-130427
config: i386-randconfig-s0-12100145 (attached as .config)
compiler: gcc-6 (Debian 6.4.0-9) 6.4.0 20171026
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

   In file included from include/linux/perf_event.h:48:0,
                    from include/linux/trace_events.h:10,
                    from include/trace/syscall.h:7,
                    from include/linux/syscalls.h:85,
                    from kernel/fork.c:52:
   include/linux/ftrace.h: In function 'ftrace_init':
>> include/linux/ftrace.h:735:40: error: implicit declaration of function 'ftrace_early_shutdown' [-Werror=implicit-function-declaration]
    static inline void ftrace_init(void) { ftrace_early_shutdown(); }
                                           ^~~~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors

vim +/ftrace_early_shutdown +735 include/linux/ftrace.h

   731	
   732	#ifdef CONFIG_FTRACE_MCOUNT_RECORD
   733	extern void ftrace_init(void);
   734	#else
 > 735	static inline void ftrace_init(void) { ftrace_early_shutdown(); }
   736	#endif
   737	

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