linux-kernel - Re: [PATCH 2/2] sched/debug: intruduce task_state_to

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Date:   Wed, 9 Aug 2017 01:27:39 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Xie XiuQi <xiexiuqi@...wei.com>
Cc:     kbuild-all@...org, mingo@...hat.com, peterz@...radead.org,
        linux-kernel@...r.kernel.org, huawei.libin@...wei.com,
        cj.chengjian@...wei.com, xiexiuqi@...wei.com
Subject: Re: [PATCH 2/2] sched/debug: intruduce task_state_to_char helper
 function

Hi Xie,

[auto build test ERROR on tip/sched/core]
[also build test ERROR on v4.13-rc4 next-20170808]
[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/Xie-XiuQi/sched-debug-show-task-state-on-proc-sched_debug/20170808-135825
config: x86_64-randconfig-ws0-08082012 (attached as .config)
compiler: gcc-4.8 (Debian 4.8.4-1) 4.8.4
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All error/warnings (new ones prefixed by >>):

   In file included from include/uapi/linux/stddef.h:1:0,
                    from include/linux/stddef.h:4,
                    from include/uapi/linux/posix_types.h:4,
                    from include/uapi/linux/types.h:13,
                    from include/linux/types.h:5,
                    from include/linux/proc_fs.h:7,
                    from kernel/sched/debug.c:13:
   kernel/sched/debug.c: In function 'print_task':
>> include/linux/compiler.h:159:17: error: implicit declaration of function 'task_sate_to_char' [-Werror=implicit-function-declaration]
      static struct ftrace_branch_data   \
                    ^
   include/linux/compiler.h:154:23: note: in expansion of macro '__trace_if'
    #define if(cond, ...) __trace_if( (cond , ## __VA_ARGS__) )
                          ^
>> kernel/sched/debug.c:32:2: note: in expansion of macro 'if'
     if (m)     \
     ^
>> kernel/sched/debug.c:432:3: note: in expansion of macro 'SEQ_printf'
      SEQ_printf(m, " %c", task_sate_to_char(p));
      ^
   cc1: some warnings being treated as errors
--
   In file included from include/uapi/linux/stddef.h:1:0,
                    from include/linux/stddef.h:4,
                    from include/uapi/linux/posix_types.h:4,
                    from include/uapi/linux/types.h:13,
                    from include/linux/types.h:5,
                    from include/linux/proc_fs.h:7,
                    from kernel//sched/debug.c:13:
   kernel//sched/debug.c: In function 'print_task':
>> include/linux/compiler.h:159:17: error: implicit declaration of function 'task_sate_to_char' [-Werror=implicit-function-declaration]
      static struct ftrace_branch_data   \
                    ^
   include/linux/compiler.h:154:23: note: in expansion of macro '__trace_if'
    #define if(cond, ...) __trace_if( (cond , ## __VA_ARGS__) )
                          ^
   kernel//sched/debug.c:32:2: note: in expansion of macro 'if'
     if (m)     \
     ^
   kernel//sched/debug.c:432:3: note: in expansion of macro 'SEQ_printf'
      SEQ_printf(m, " %c", task_sate_to_char(p));
      ^
   cc1: some warnings being treated as errors

vim +/task_sate_to_char +159 include/linux/compiler.h

2bcd521a Steven Rostedt 2008-11-21  148  
2bcd521a Steven Rostedt 2008-11-21  149  #ifdef CONFIG_PROFILE_ALL_BRANCHES
2bcd521a Steven Rostedt 2008-11-21  150  /*
2bcd521a Steven Rostedt 2008-11-21  151   * "Define 'is'", Bill Clinton
2bcd521a Steven Rostedt 2008-11-21  152   * "Define 'if'", Steven Rostedt
2bcd521a Steven Rostedt 2008-11-21  153   */
ab3c9c68 Linus Torvalds 2009-04-07  154  #define if(cond, ...) __trace_if( (cond , ## __VA_ARGS__) )
ab3c9c68 Linus Torvalds 2009-04-07  155  #define __trace_if(cond) \
b33c8ff4 Arnd Bergmann  2016-02-12  156  	if (__builtin_constant_p(!!(cond)) ? !!(cond) :			\
2bcd521a Steven Rostedt 2008-11-21  157  	({								\
2bcd521a Steven Rostedt 2008-11-21  158  		int ______r;						\
2bcd521a Steven Rostedt 2008-11-21 @159  		static struct ftrace_branch_data			\
2bcd521a Steven Rostedt 2008-11-21  160  			__attribute__((__aligned__(4)))			\
2bcd521a Steven Rostedt 2008-11-21  161  			__attribute__((section("_ftrace_branch")))	\
2bcd521a Steven Rostedt 2008-11-21  162  			______f = {					\
2bcd521a Steven Rostedt 2008-11-21  163  				.func = __func__,			\
2bcd521a Steven Rostedt 2008-11-21  164  				.file = __FILE__,			\
2bcd521a Steven Rostedt 2008-11-21  165  				.line = __LINE__,			\
2bcd521a Steven Rostedt 2008-11-21  166  			};						\
2bcd521a Steven Rostedt 2008-11-21  167  		______r = !!(cond);					\
97e7e4f3 Witold Baryluk 2009-03-17  168  		______f.miss_hit[______r]++;					\
2bcd521a Steven Rostedt 2008-11-21  169  		______r;						\
2bcd521a Steven Rostedt 2008-11-21  170  	}))
2bcd521a Steven Rostedt 2008-11-21  171  #endif /* CONFIG_PROFILE_ALL_BRANCHES */
2bcd521a Steven Rostedt 2008-11-21  172  

:::::: The code at line 159 was first introduced by commit
:::::: 2bcd521a684cc94befbe2ce7d5b613c841b0d304 trace: profile all if conditionals

:::::: TO: Steven Rostedt <srostedt@...hat.com>
:::::: CC: Ingo Molnar <mingo@...e.hu>

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