[paulmckrcu:puranjay.2026.06.24a 54/65] tree.c:undefined reference to `rcu_preempt_blocked_readers_cgp_ndqs'

[paulmckrcu:puranjay.2026.06.24a 54/65] tree.c:undefined reference to `rcu_preempt_blocked_readers_cgp_ndqs'

[kernel test robot]

tree:   https://github.com/paulmckrcu/linux puranjay.2026.06.24a
head:   9f9e05ef4454de1724d65dcc1d45018d0457bd7c
commit: ab15f8d23a687736b674b3b8669a744dd709d97f [54/65] rcu: Make rcu_gp_cleanup() account for ->dqs_blkd_tasks
config: arm64-allnoconfig (https://download.01.org/0day-ci/archive/20260625/202606250524.NuoTnzfd-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 16.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260625/202606250524.NuoTnzfd-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/202606250524.NuoTnzfd-lkp@intel.com/

All error/warnings (new ones prefixed by >>):

   In file included from kernel/rcu/tree.c:69:
>> kernel/rcu/tree.h:498:12: warning: 'rcu_preempt_blocked_readers_cgp_ndqs' used but never defined
     498 | static int rcu_preempt_blocked_readers_cgp_ndqs(struct rcu_node *rnp);
         |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
--
   aarch64-linux-ld: Unexpected GOT/PLT entries detected!
   aarch64-linux-ld: Unexpected run-time procedure linkages detected!
   aarch64-linux-ld: kernel/rcu/tree.o: in function `rcu_gp_cleanup':
>> tree.c:(.text+0x66c0): undefined reference to `rcu_preempt_blocked_readers_cgp_ndqs'

--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

Re: [paulmckrcu:puranjay.2026.06.24a 54/65] tree.c:undefined reference to `rcu_preempt_blocked_readers_cgp_ndqs'

[Paul E. McKenney]

On Thu, Jun 25, 2026 at 05:26:28AM +0800, kernel test robot wrote:
> tree:   https://github.com/paulmckrcu/linux puranjay.2026.06.24a
> head:   9f9e05ef4454de1724d65dcc1d45018d0457bd7c
> commit: ab15f8d23a687736b674b3b8669a744dd709d97f [54/65] rcu: Make rcu_gp_cleanup() account for ->dqs_blkd_tasks
> config: arm64-allnoconfig (https://download.01.org/0day-ci/archive/20260625/202606250524.NuoTnzfd-lkp@intel.com/config)
> compiler: aarch64-linux-gcc (GCC) 16.1.0
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260625/202606250524.NuoTnzfd-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/202606250524.NuoTnzfd-lkp@intel.com/
> 
> All error/warnings (new ones prefixed by >>):
> 
>    In file included from kernel/rcu/tree.c:69:
> >> kernel/rcu/tree.h:498:12: warning: 'rcu_preempt_blocked_readers_cgp_ndqs' used but never defined
>      498 | static int rcu_preempt_blocked_readers_cgp_ndqs(struct rcu_node *rnp);
>          |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> --
>    aarch64-linux-ld: Unexpected GOT/PLT entries detected!
>    aarch64-linux-ld: Unexpected run-time procedure linkages detected!
>    aarch64-linux-ld: kernel/rcu/tree.o: in function `rcu_gp_cleanup':
> >> tree.c:(.text+0x66c0): undefined reference to `rcu_preempt_blocked_readers_cgp_ndqs'

Puranjay is an innocent bystander on this one.  The fix is at:

7c6c1219be4d ("fixup! rcu: Make rcu_gp_cleanup() account for ->dqs_blkd_tasks")

							Thanx, Paul