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Message-ID: <202503181317.eiDzfsM0-lkp@intel.com>
Date: Tue, 18 Mar 2025 13:47:15 +0800
From: kernel test robot <lkp@...el.com>
To: Mike Snitzer <snitzer@...nel.org>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
Anna Schumaker <anna.schumaker@...cle.com>,
Jeff Layton <jlayton@...nel.org>
Subject: include/linux/rcupdate.h:538:9: error: dereferencing pointer to
incomplete type 'struct nfsd_file'
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: fc444ada131001812c5d10b380837238c9cf7c8c
commit: 86e00412254a717ffd5d38dc5ec0ee1cce6281b3 nfs: cache all open LOCALIO nfsd_file(s) in client
date: 9 weeks ago
config: m68k-allmodconfig (https://download.01.org/0day-ci/archive/20250318/202503181317.eiDzfsM0-lkp@intel.com/config)
compiler: m68k-linux-gcc (GCC) 8.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250318/202503181317.eiDzfsM0-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202503181317.eiDzfsM0-lkp@intel.com/
All errors (new ones prefixed by >>):
In file included from include/linux/rbtree.h:24,
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);
^~~~~~~~~~~~~~~
--
In file included from include/linux/rbtree.h:24,
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 localio.c:11:
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)
^~~~~~~~~~~~~~~~~~~~~
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@...il.com>
:::::: CC: Paul E. McKenney <paulmck@...nel.org>
--
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https://github.com/intel/lkp-tests/wiki
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