linux-kernel - [ammarfaizi2-block:paulmck/linux-rcu/dev 53/55] include/linux/rcupdate.h:207:34: error: implicit declaration of function 'rcu_tasks_trace_qs'; did you mean 'rcu_tasks_classic

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Message-ID: <202205191043.pLKc0AwM-lkp@intel.com>
Date:   Thu, 19 May 2022 10:42:19 +0800
From:   kernel test robot <lkp@...el.com>
To:     "Paul E. McKenney" <paulmck@...nel.org>
Cc:     kbuild-all@...ts.01.org,
        GNU/Weeb Mailing List <gwml@...r.gnuweeb.org>,
        linux-kernel@...r.kernel.org
Subject: [ammarfaizi2-block:paulmck/linux-rcu/dev 53/55]
 include/linux/rcupdate.h:207:34: error: implicit declaration of function
 'rcu_tasks_trace_qs'; did you mean 'rcu_tasks_classic_qs'?

tree:   https://github.com/ammarfaizi2/linux-block paulmck/linux-rcu/dev
head:   b2a7e376a9dcfa2de46236696dfdd48275edf63d
commit: 840470b0e655a13aae153f3b46d1e02fadf5c06a [53/55] fixup! tasks-rcu: Track blocked RCU Tasks Trace readers
config: um-i386_defconfig (https://download.01.org/0day-ci/archive/20220519/202205191043.pLKc0AwM-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.2.0-20) 11.2.0
reproduce (this is a W=1 build):
        # https://github.com/ammarfaizi2/linux-block/commit/840470b0e655a13aae153f3b46d1e02fadf5c06a
        git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
        git fetch --no-tags ammarfaizi2-block paulmck/linux-rcu/dev
        git checkout 840470b0e655a13aae153f3b46d1e02fadf5c06a
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=um SUBARCH=i386 SHELL=/bin/bash

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All errors (new ones prefixed by >>):

   kernel/sched/core.c:5235:20: warning: no previous prototype for 'task_sched_runtime' [-Wmissing-prototypes]
    5235 | unsigned long long task_sched_runtime(struct task_struct *p)
         |                    ^~~~~~~~~~~~~~~~~~
   In file included from include/linux/rculist.h:11,
                    from include/linux/dcache.h:8,
                    from include/linux/fs.h:8,
                    from include/linux/highmem.h:5,
                    from kernel/sched/core.c:9:
   kernel/sched/core.c: In function '__schedule':
>> include/linux/rcupdate.h:207:34: error: implicit declaration of function 'rcu_tasks_trace_qs'; did you mean 'rcu_tasks_classic_qs'? [-Werror=implicit-function-declaration]
     207 | #define rcu_tasks_qs(t, preempt) rcu_tasks_trace_qs(t);
         |                                  ^~~~~~~~~~~~~~~~~~
   include/linux/rcutiny.h:74:17: note: in expansion of macro 'rcu_tasks_qs'
      74 |                 rcu_tasks_qs(current, (preempt)); \
         |                 ^~~~~~~~~~~~
   kernel/sched/core.c:6279:9: note: in expansion of macro 'rcu_note_context_switch'
    6279 |         rcu_note_context_switch(!!sched_mode);
         |         ^~~~~~~~~~~~~~~~~~~~~~~
   kernel/sched/core.c: At top level:
   kernel/sched/core.c:9432:13: warning: no previous prototype for 'sched_init_smp' [-Wmissing-prototypes]
    9432 | void __init sched_init_smp(void)
         |             ^~~~~~~~~~~~~~
   kernel/sched/core.c:9460:13: warning: no previous prototype for 'sched_init' [-Wmissing-prototypes]
    9460 | void __init sched_init(void)
         |             ^~~~~~~~~~
   cc1: some warnings being treated as errors


vim +207 include/linux/rcupdate.h

   201	
   202	#define rcu_note_voluntary_context_switch(t) rcu_tasks_qs(t, false)
   203	void exit_tasks_rcu_start(void);
   204	void exit_tasks_rcu_finish(void);
   205	#else /* #ifdef CONFIG_TASKS_RCU_GENERIC */
   206	#define rcu_tasks_classic_qs(t, preempt) do { } while (0)
 > 207	#define rcu_tasks_qs(t, preempt) rcu_tasks_trace_qs(t);
   208	#define rcu_note_voluntary_context_switch(t) do { } while (0)
   209	#define call_rcu_tasks call_rcu
   210	#define synchronize_rcu_tasks synchronize_rcu
   211	static inline void exit_tasks_rcu_start(void) { }
   212	static inline void exit_tasks_rcu_finish(void) { }
   213	#endif /* #else #ifdef CONFIG_TASKS_RCU_GENERIC */
   214	

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