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* [bigeasy-staging:lockdep-nesting 6/15] include/linux/fs.h:1422:29: error: array type has incomplete element type 'struct percpu_rw_semaphore'
@ 2020-03-18 21:35 kbuild test robot
  2020-03-18 22:52 ` Sebastian Andrzej Siewior
  0 siblings, 1 reply; 2+ messages in thread
From: kbuild test robot @ 2020-03-18 21:35 UTC (permalink / raw)
  To: kbuild-all

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/bigeasy/staging.git lockdep-nesting
head:   a8af4e4e741812a0cdf0b5c48c7113a3841af44e
commit: 24ae582376f730ae8781ac1a44d8e20dc51e97aa [6/15] rcuwait: Add @state argument to rcuwait_wait_event()
config: nds32-defconfig (attached as .config)
compiler: nds32le-linux-gcc (GCC) 9.2.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 24ae582376f730ae8781ac1a44d8e20dc51e97aa
        # save the attached .config to linux build tree
        GCC_VERSION=9.2.0 make.cross ARCH=nds32 

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   In file included from include/linux/huge_mm.h:8,
                    from include/linux/mm.h:567,
                    from arch/nds32/include/asm/uaccess.h:14,
                    from include/linux/uaccess.h:11,
                    from include/linux/sched/task.h:11,
                    from include/linux/sched/signal.h:9,
                    from include/linux/rcuwait.h:6,
                    from include/linux/percpu-rwsem.h:8,
                    from kernel/locking/percpu-rwsem.c:6:
>> include/linux/fs.h:1422:29: error: array type has incomplete element type 'struct percpu_rw_semaphore'
    1422 |  struct percpu_rw_semaphore rw_sem[SB_FREEZE_LEVELS];
         |                             ^~~~~~

vim +1422 include/linux/fs.h

5accdf82ba25ca Jan Kara      2012-06-12  1418  
5accdf82ba25ca Jan Kara      2012-06-12  1419  struct sb_writers {
5accdf82ba25ca Jan Kara      2012-06-12  1420  	int				frozen;		/* Is sb frozen? */
8129ed29644bf5 Oleg Nesterov 2015-08-11  1421  	wait_queue_head_t		wait_unfrozen;	/* for get_super_thawed() */
8129ed29644bf5 Oleg Nesterov 2015-08-11 @1422  	struct percpu_rw_semaphore	rw_sem[SB_FREEZE_LEVELS];
5accdf82ba25ca Jan Kara      2012-06-12  1423  };
5accdf82ba25ca Jan Kara      2012-06-12  1424  

:::::: The code at line 1422 was first introduced by commit
:::::: 8129ed29644bf56ed17ec1bbbeed5c568b43d6a0 change sb_writers to use percpu_rw_semaphore

:::::: TO: Oleg Nesterov <oleg@redhat.com>
:::::: CC: Oleg Nesterov <oleg@redhat.com>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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^ permalink raw reply	[flat|nested] 2+ messages in thread

* Re: [bigeasy-staging:lockdep-nesting 6/15] include/linux/fs.h:1422:29: error: array type has incomplete element type 'struct percpu_rw_semaphore'
  2020-03-18 21:35 [bigeasy-staging:lockdep-nesting 6/15] include/linux/fs.h:1422:29: error: array type has incomplete element type 'struct percpu_rw_semaphore' kbuild test robot
@ 2020-03-18 22:52 ` Sebastian Andrzej Siewior
  0 siblings, 0 replies; 2+ messages in thread
From: Sebastian Andrzej Siewior @ 2020-03-18 22:52 UTC (permalink / raw)
  To: kbuild-all

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On 2020-03-19 05:35:35 [+0800], kbuild test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/bigeasy/staging.git lockdep-nesting
> head:   a8af4e4e741812a0cdf0b5c48c7113a3841af44e
> commit: 24ae582376f730ae8781ac1a44d8e20dc51e97aa [6/15] rcuwait: Add @state argument to rcuwait_wait_event()
> config: nds32-defconfig (attached as .config)
> compiler: nds32le-linux-gcc (GCC) 9.2.0
> 
> All errors (new ones prefixed by >>):
> 
>    In file included from include/linux/huge_mm.h:8,
>                     from include/linux/mm.h:567,
>                     from arch/nds32/include/asm/uaccess.h:14,
>                     from include/linux/uaccess.h:11,
>                     from include/linux/sched/task.h:11,
>                     from include/linux/sched/signal.h:9,
>                     from include/linux/rcuwait.h:6,
>                     from include/linux/percpu-rwsem.h:8,
>                     from kernel/locking/percpu-rwsem.c:6:
> >> include/linux/fs.h:1422:29: error: array type has incomplete element type 'struct percpu_rw_semaphore'
>     1422 |  struct percpu_rw_semaphore rw_sem[SB_FREEZE_LEVELS];
>          |                             ^~~~~~
> 

With

diff --git a/arch/nds32/include/asm/uaccess.h b/arch/nds32/include/asm/uaccess.h
index 8916ad9f9f139..3a9219f53ee0d 100644
--- a/arch/nds32/include/asm/uaccess.h
+++ b/arch/nds32/include/asm/uaccess.h
@@ -11,7 +11,6 @@
 #include <asm/errno.h>
 #include <asm/memory.h>
 #include <asm/types.h>
-#include <linux/mm.h>
 
 #define __asmeq(x, y)  ".ifnc " x "," y " ; .err ; .endif\n\t"
 

The defconfig compiles. Also two of randconfigs just did.

Sebastian

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2020-03-18 21:35 [bigeasy-staging:lockdep-nesting 6/15] include/linux/fs.h:1422:29: error: array type has incomplete element type 'struct percpu_rw_semaphore' kbuild test robot
2020-03-18 22:52 ` Sebastian Andrzej Siewior

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