include/linux/rcupdate.h:538:9: error: dereferencing pointer to incomplete type 'struct nfsd_file'

[kernel test robot <lkp@intel.com>]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   b36ddb9210e6812eb1c86ad46b66cc46aa193487
commit: 86e00412254a717ffd5d38dc5ec0ee1cce6281b3 nfs: cache all open LOCALIO nfsd_file(s) in client
date:   4 months ago
config: riscv-randconfig-2004-20250521 (https://download.01.org/0day-ci/archive/20250521/202505210501.UEXVUlZf-lkp@intel.com/config)
compiler: riscv64-linux-gcc (GCC) 7.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250521/202505210501.UEXVUlZf-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202505210501.UEXVUlZf-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from include/linux/rbtree.h:24:0,
                    from include/linux/mm_types.h:11,
                    from include/linux/mmzone.h:22,
                    from include/linux/gfp.h:7,
                    from include/linux/umh.h:4,
                    from include/linux/kmod.h:9,
                    from include/linux/module.h:17,
                    from fs/nfs/localio.c:11:
   fs/nfs/localio.c: In function 'nfs_local_open_fh':
>> include/linux/rcupdate.h:538:9: error: dereferencing pointer to incomplete type 'struct nfsd_file'
     typeof(*p) *local = (typeof(*p) *__force)READ_ONCE(p); \
            ^
   include/linux/rcupdate.h:686:2: note: in expansion of macro '__rcu_dereference_check'
     __rcu_dereference_check((p), __UNIQUE_ID(rcu), \
     ^~~~~~~~~~~~~~~~~~~~~~~
   include/linux/rcupdate.h:758:28: note: in expansion of macro 'rcu_dereference_check'
    #define rcu_dereference(p) rcu_dereference_check(p, 0)
                               ^~~~~~~~~~~~~~~~~~~~~
   fs/nfs/localio.c:279:7: note: in expansion of macro 'rcu_dereference'
     nf = rcu_dereference(*pnf);
          ^~~~~~~~~~~~~~~


vim +538 include/linux/rcupdate.h

76c8eaafe4f061 Paul E. McKenney        2021-04-21  528  
24ba53017e188e Chun-Hung Tseng         2021-09-15  529  #define __rcu_access_pointer(p, local, space) \
ca5ecddfa8fcbd Paul E. McKenney        2010-04-28  530  ({ \
24ba53017e188e Chun-Hung Tseng         2021-09-15  531  	typeof(*p) *local = (typeof(*p) *__force)READ_ONCE(p); \
423a86a610cad1 Joel Fernandes (Google  2018-12-12  532) 	rcu_check_sparse(p, space); \
24ba53017e188e Chun-Hung Tseng         2021-09-15  533  	((typeof(*p) __force __kernel *)(local)); \
ca5ecddfa8fcbd Paul E. McKenney        2010-04-28  534  })
24ba53017e188e Chun-Hung Tseng         2021-09-15  535  #define __rcu_dereference_check(p, local, c, space) \
ca5ecddfa8fcbd Paul E. McKenney        2010-04-28  536  ({ \
ac59853c06993a Pranith Kumar           2014-11-13  537  	/* Dependency order vs. p above. */ \
24ba53017e188e Chun-Hung Tseng         2021-09-15 @538  	typeof(*p) *local = (typeof(*p) *__force)READ_ONCE(p); \
f78f5b90c4ffa5 Paul E. McKenney        2015-06-18  539  	RCU_LOCKDEP_WARN(!(c), "suspicious rcu_dereference_check() usage"); \
423a86a610cad1 Joel Fernandes (Google  2018-12-12  540) 	rcu_check_sparse(p, space); \
24ba53017e188e Chun-Hung Tseng         2021-09-15  541  	((typeof(*p) __force __kernel *)(local)); \
ca5ecddfa8fcbd Paul E. McKenney        2010-04-28  542  })
24ba53017e188e Chun-Hung Tseng         2021-09-15  543  #define __rcu_dereference_protected(p, local, c, space) \
ca5ecddfa8fcbd Paul E. McKenney        2010-04-28  544  ({ \
f78f5b90c4ffa5 Paul E. McKenney        2015-06-18  545  	RCU_LOCKDEP_WARN(!(c), "suspicious rcu_dereference_protected() usage"); \
423a86a610cad1 Joel Fernandes (Google  2018-12-12  546) 	rcu_check_sparse(p, space); \
ca5ecddfa8fcbd Paul E. McKenney        2010-04-28  547  	((typeof(*p) __force __kernel *)(p)); \
ca5ecddfa8fcbd Paul E. McKenney        2010-04-28  548  })
24ba53017e188e Chun-Hung Tseng         2021-09-15  549  #define __rcu_dereference_raw(p, local) \
995f1405610bd8 Paul E. McKenney        2016-07-01  550  ({ \
995f1405610bd8 Paul E. McKenney        2016-07-01  551  	/* Dependency order vs. p above. */ \
24ba53017e188e Chun-Hung Tseng         2021-09-15  552  	typeof(p) local = READ_ONCE(p); \
24ba53017e188e Chun-Hung Tseng         2021-09-15  553  	((typeof(*p) __force __kernel *)(local)); \
995f1405610bd8 Paul E. McKenney        2016-07-01  554  })
24ba53017e188e Chun-Hung Tseng         2021-09-15  555  #define rcu_dereference_raw(p) __rcu_dereference_raw(p, __UNIQUE_ID(rcu))
ca5ecddfa8fcbd Paul E. McKenney        2010-04-28  556  

:::::: The code at line 538 was first introduced by commit
:::::: 24ba53017e188e031f9cb8b290286fad52d2af00 rcu: Replace ________p1 and _________p1 with __UNIQUE_ID(rcu)

:::::: TO: Chun-Hung Tseng <henrybear327@gmail.com>
:::::: CC: Paul E. McKenney <paulmck@kernel.org>

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