linux-kernel - [rostedt-trace:ftrace/core 1/2] include/linux/rcupdate.h:404:11: error: dereferencing pointer to incomplete type 'struct trace_pid

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Date:   Wed, 29 Sep 2021 08:35:33 +0800
From:   kernel test robot <lkp@...el.com>
To:     "Steven Rostedt (VMware)" <rostedt@...dmis.org>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: [rostedt-trace:ftrace/core 1/2] include/linux/rcupdate.h:404:11:
 error: dereferencing pointer to incomplete type 'struct trace_pid_list'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git ftrace/core
head:   c8d01c02b46e599b057d7d24d1342ae9fcf828c2
commit: eff05923d317af757bb800c1dabc25388abda36b [1/2] tracing: Place trace_pid_list logic into abstract functions
config: x86_64-randconfig-a014-20210928 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git/commit/?id=eff05923d317af757bb800c1dabc25388abda36b
        git remote add rostedt-trace https://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git
        git fetch --no-tags rostedt-trace ftrace/core
        git checkout eff05923d317af757bb800c1dabc25388abda36b
        # save the attached .config to linux build tree
        mkdir build_dir
        make W=1 O=build_dir ARCH=x86_64 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 >>):

   In file included from include/linux/workqueue.h:16,
                    from kernel/trace/trace_events.c:14:
   kernel/trace/trace_events.c: In function 'trace_event_ignore_this_pid':
>> include/linux/rcupdate.h:404:11: error: dereferencing pointer to incomplete type 'struct trace_pid_list'
     404 |  ((typeof(*p) __force __kernel *)(________p1)); \
   kernel/trace/trace_events.c:450:13: note: in expansion of macro 'rcu_dereference_raw'
     450 |  pid_list = rcu_dereference_raw(tr->filtered_pids);
         |             ^~~~~~~~~~~~~~~~~~~


vim +404 include/linux/rcupdate.h

76c8eaafe4f061f Paul E. McKenney        2021-04-21  379  
ca5ecddfa8fcbd9 Paul E. McKenney        2010-04-28  380  #define __rcu_access_pointer(p, space) \
ca5ecddfa8fcbd9 Paul E. McKenney        2010-04-28  381  ({ \
7d0ae8086b82831 Paul E. McKenney        2015-03-03  382  	typeof(*p) *_________p1 = (typeof(*p) *__force)READ_ONCE(p); \
423a86a610cad12 Joel Fernandes (Google  2018-12-12  383) 	rcu_check_sparse(p, space); \
ca5ecddfa8fcbd9 Paul E. McKenney        2010-04-28  384  	((typeof(*p) __force __kernel *)(_________p1)); \
ca5ecddfa8fcbd9 Paul E. McKenney        2010-04-28  385  })
ca5ecddfa8fcbd9 Paul E. McKenney        2010-04-28  386  #define __rcu_dereference_check(p, c, space) \
ca5ecddfa8fcbd9 Paul E. McKenney        2010-04-28  387  ({ \
ac59853c06993a4 Pranith Kumar           2014-11-13  388  	/* Dependency order vs. p above. */ \
506458efaf153c1 Will Deacon             2017-10-24  389  	typeof(*p) *________p1 = (typeof(*p) *__force)READ_ONCE(p); \
f78f5b90c4ffa55 Paul E. McKenney        2015-06-18  390  	RCU_LOCKDEP_WARN(!(c), "suspicious rcu_dereference_check() usage"); \
423a86a610cad12 Joel Fernandes (Google  2018-12-12  391) 	rcu_check_sparse(p, space); \
ac59853c06993a4 Pranith Kumar           2014-11-13  392  	((typeof(*p) __force __kernel *)(________p1)); \
ca5ecddfa8fcbd9 Paul E. McKenney        2010-04-28  393  })
ca5ecddfa8fcbd9 Paul E. McKenney        2010-04-28  394  #define __rcu_dereference_protected(p, c, space) \
ca5ecddfa8fcbd9 Paul E. McKenney        2010-04-28  395  ({ \
f78f5b90c4ffa55 Paul E. McKenney        2015-06-18  396  	RCU_LOCKDEP_WARN(!(c), "suspicious rcu_dereference_protected() usage"); \
423a86a610cad12 Joel Fernandes (Google  2018-12-12  397) 	rcu_check_sparse(p, space); \
ca5ecddfa8fcbd9 Paul E. McKenney        2010-04-28  398  	((typeof(*p) __force __kernel *)(p)); \
ca5ecddfa8fcbd9 Paul E. McKenney        2010-04-28  399  })
995f1405610bd84 Paul E. McKenney        2016-07-01  400  #define rcu_dereference_raw(p) \
995f1405610bd84 Paul E. McKenney        2016-07-01  401  ({ \
995f1405610bd84 Paul E. McKenney        2016-07-01  402  	/* Dependency order vs. p above. */ \
506458efaf153c1 Will Deacon             2017-10-24  403  	typeof(p) ________p1 = READ_ONCE(p); \
995f1405610bd84 Paul E. McKenney        2016-07-01 @404  	((typeof(*p) __force __kernel *)(________p1)); \
995f1405610bd84 Paul E. McKenney        2016-07-01  405  })
ca5ecddfa8fcbd9 Paul E. McKenney        2010-04-28  406  

:::::: The code at line 404 was first introduced by commit
:::::: 995f1405610bd8446c5be37d2ffc031a7729e406 rcu: Suppress sparse warnings for rcu_dereference_raw()

:::::: TO: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
:::::: CC: David Howells <dhowells@...hat.com>

---
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