Re: [PATCH] staging: lustre: cl_lock: Remove cl_lock_lockdep_init wrapper

[Greg KH]

On Wed, Nov 11, 2015 at 10:51:36PM +0530, Shivani Bhardwaj wrote:
> On Wed, Nov 11, 2015 at 4:24 PM, kbuild test robot <lkp@xxxxxxxxx> wrote:
> > Hi Shivani,
> >
> > [auto build test ERROR on staging/staging-testing]
> > [also build test ERROR on v4.3 next-20151111]
> >
> > url:    https://github.com/0day-ci/linux/commits/Shivani-Bhardwaj/staging-lustre-cl_lock-Remove-cl_lock_lockdep_init-wrapper/20151111-182452
> > config: m68k-allyesconfig (attached as .config)
> > reproduce:
> >         wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
> >         chmod +x ~/bin/make.cross
> >         # save the attached .config to linux build tree
> >         make.cross ARCH=m68k
> >
> > All errors (new ones prefixed by >>):
> >
> >    In file included from include/linux/spinlock_types.h:18:0,
> >                     from include/linux/spinlock.h:81,
> >                     from include/linux/mmzone.h:7,
> >                     from include/linux/gfp.h:5,
> >                     from include/linux/slab.h:14,
> >                     from drivers/staging/lustre/lustre/obdclass/../include/obd_support.h:40,
> >                     from drivers/staging/lustre/lustre/obdclass/../include/obd_class.h:39,
> >                     from drivers/staging/lustre/lustre/obdclass/cl_lock.c:43:
> >    drivers/staging/lustre/lustre/obdclass/cl_lock.c: In function 'cl_lock_alloc':
> >>> drivers/staging/lustre/lustre/obdclass/cl_lock.c:379:37: error: 'cl_lock_key' undeclared (first use in this function)
> >       lockdep_set_class_and_name(lock, &cl_lock_key, "EXT");
> >                                         ^
> >    include/linux/lockdep.h:401:15: note: in definition of macro 'lockdep_set_class_and_name'
> >       do { (void)(key); (void)(name); } while (0)
> >                   ^
> >    drivers/staging/lustre/lustre/obdclass/cl_lock.c:379:37: note: each undeclared identifier is reported only once for each function it appears in
> >       lockdep_set_class_and_name(lock, &cl_lock_key, "EXT");
> >                                         ^
> >    include/linux/lockdep.h:401:15: note: in definition of macro 'lockdep_set_class_and_name'
> >       do { (void)(key); (void)(name); } while (0)
> >                   ^
> >    drivers/staging/lustre/lustre/obdclass/cl_lock.c: At top level:
> >    drivers/staging/lustre/lustre/obdclass/cl_lock.c:166:13: warning: 'cl_lock_lockdep_init' defined but not used [-Wunused-function]
> >     static void cl_lock_lockdep_init(struct cl_lock *lock)
> >                 ^
> >
> > vim +/cl_lock_key +379 drivers/staging/lustre/lustre/obdclass/cl_lock.c
> >
> >    373                  lockdep_set_class(&lock->cll_guard, &cl_lock_guard_class);
> >    374                  init_waitqueue_head(&lock->cll_wq);
> >    375                  head = obj->co_lu.lo_header;
> >    376                  CS_LOCKSTATE_INC(obj, CLS_NEW);
> >    377                  CS_LOCK_INC(obj, total);
> >    378                  CS_LOCK_INC(obj, create);
> >  > 379                  lockdep_set_class_and_name(lock, &cl_lock_key, "EXT");
> >    380                  list_for_each_entry(obj, &head->loh_layers,
> >    381                                          co_lu.lo_linkage) {
> >    382                          int err;
> >
> > ---
> > 0-DAY kernel test infrastructure                Open Source Technology Center
> > https://lists.01.org/pipermail/kbuild-all                   Intel Corporation
> 
> Hi all,
> 
> I'm not getting any of these errors at compilation. I've checked
> thrice. Could you please tell what am I doing wrong so that I can
> avoid introducing errors in future patches?

Use the .config provided, odds are you have lockdep enabled.
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