Re: [RFC 02/15] net/rds: Give each connection its own workqueue

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

Hi Allison,

[This is a private test report for your RFC patch.]
kernel test robot noticed the following build errors:

[auto build test ERROR on net/main]
[also build test ERROR on net-next/main linus/master horms-ipvs/master v6.18-rc2 next-20251024]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Allison-Henderson/net-rds-Add-per-cp-work-queue/20251023-032058
base:   net/main
patch link:    https://lore.kernel.org/r/20251022191715.157755-3-achender%40kernel.org
patch subject: [RFC 02/15] net/rds: Give each connection its own workqueue
config: s390-allyesconfig (https://download.01.org/0day-ci/archive/20251026/202510260705.2YLUonGC-lkp@intel.com/config)
compiler: s390-linux-gcc (GCC) 15.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251026/202510260705.2YLUonGC-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/202510260705.2YLUonGC-lkp@intel.com/

All errors (new ones prefixed by >>):

   net/rds/ib.c: In function 'rds_ib_unregister_client':
>> net/rds/ib.c:500:25: error: 'RDS_NMBR_CP_WQS' undeclared (first use in this function)
     500 |         for (i = 0; i < RDS_NMBR_CP_WQS; ++i)
         |                         ^~~~~~~~~~~~~~~
   net/rds/ib.c:500:25: note: each undeclared identifier is reported only once for each function it appears in
   In file included from include/linux/srcu.h:21,
                    from include/linux/notifier.h:16,
                    from arch/s390/include/asm/uprobes.h:12,
                    from include/linux/uprobes.h:66,
                    from include/linux/mm_types.h:16,
                    from include/linux/uio.h:9,
                    from include/linux/socket.h:8,
                    from include/uapi/linux/in.h:25,
                    from include/linux/in.h:19,
                    from net/rds/ib.c:34:
>> net/rds/ib.c:501:33: error: 'rds_cp_wqs' undeclared (first use in this function); did you mean 'rds_ib_wq'?
     501 |                 flush_workqueue(rds_cp_wqs[i]);
         |                                 ^~~~~~~~~~
   include/linux/workqueue.h:778:41: note: in definition of macro 'flush_workqueue'
     778 |         struct workqueue_struct *_wq = (wq);                            \
         |                                         ^~


vim +/RDS_NMBR_CP_WQS +500 net/rds/ib.c

   491	
   492	static void rds_ib_unregister_client(void)
   493	{
   494		int i;
   495	
   496		ib_unregister_client(&rds_ib_client);
   497		/* wait for rds_ib_dev_free() to complete */
   498		flush_workqueue(rds_wq);
   499	
 > 500		for (i = 0; i < RDS_NMBR_CP_WQS; ++i)
 > 501			flush_workqueue(rds_cp_wqs[i]);
   502	}
   503	

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