* [zen:7.2/prjc 118/124] kernel/sched/alt_core.c:5356:6: sparse: sparse: symbol 'rt_mutex_futex_pre_schedule' was not declared. Should it be static?
@ 2026-10-07 22:28 kernel test robot
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From: kernel test robot @ 2026-10-07 22:28 UTC (permalink / raw)
To: steven; +Cc: oe-kbuild-all
tree: https://github.com/zen-kernel/zen-kernel 7.2/prjc
head: dca70816eacb7e122d8192bc4f042c74c312eb5d
commit: ecdb5900a34a8291a8457c0e29cca911c55dbf67 [118/124] sched/alt: [Sync] b715872ef0cc futex: Provide rt_mutex_.*_schedule() equivalents for futex scheduling
config: powerpc-randconfig-r2303-20261007 (https://download.01.org/0day-ci/archive/20261008/202610080022.npKGoi7g-lkp@intel.com/config)
compiler: powerpc-linux-gcc (GCC) 9.5.0
sparse: v0.6.5-rc1
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261008/202610080022.npKGoi7g-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/202610080022.npKGoi7g-lkp@intel.com/
sparse warnings: (new ones prefixed by >>)
kernel/sched/alt_core.c:453:33: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct task_struct *task @@ got struct task_struct [noderef] __rcu *curr @@
kernel/sched/alt_core.c:453:33: sparse: expected struct task_struct *task
kernel/sched/alt_core.c:453:33: sparse: got struct task_struct [noderef] __rcu *curr
kernel/sched/alt_core.c:2656:36: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct task_struct const *p @@ got struct task_struct [noderef] __rcu *curr @@
kernel/sched/alt_core.c:2656:36: sparse: expected struct task_struct const *p
kernel/sched/alt_core.c:2656:36: sparse: got struct task_struct [noderef] __rcu *curr
kernel/sched/alt_core.c:3269:27: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected struct task_struct *p @@ got struct task_struct [noderef] __rcu *curr @@
kernel/sched/alt_core.c:3269:27: sparse: expected struct task_struct *p
kernel/sched/alt_core.c:3269:27: sparse: got struct task_struct [noderef] __rcu *curr
kernel/sched/alt_core.c:4098:15: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/alt_core.c:4098:15: sparse: struct task_struct *
kernel/sched/alt_core.c:4098:15: sparse: struct task_struct [noderef] __rcu *
kernel/sched/alt_core.c:4249:14: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct task_struct *curr @@ got struct task_struct [noderef] __rcu *curr @@
kernel/sched/alt_core.c:4249:14: sparse: expected struct task_struct *curr
kernel/sched/alt_core.c:4249:14: sparse: got struct task_struct [noderef] __rcu *curr
kernel/sched/alt_core.c:4328:46: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct task_struct *curr @@ got struct task_struct [noderef] __rcu *curr @@
kernel/sched/alt_core.c:4328:46: sparse: expected struct task_struct *curr
kernel/sched/alt_core.c:4328:46: sparse: got struct task_struct [noderef] __rcu *curr
kernel/sched/alt_core.c:4891:14: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct task_struct *prev @@ got struct task_struct [noderef] __rcu *curr @@
kernel/sched/alt_core.c:4891:14: sparse: expected struct task_struct *prev
kernel/sched/alt_core.c:4891:14: sparse: got struct task_struct [noderef] __rcu *curr
>> kernel/sched/alt_core.c:5356:6: sparse: sparse: symbol 'rt_mutex_futex_pre_schedule' was not declared. Should it be static?
>> kernel/sched/alt_core.c:5375:6: sparse: sparse: symbol 'rt_mutex_futex_post_schedule' was not declared. Should it be static?
kernel/sched/alt_core.c:5439:17: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/alt_core.c:5439:17: sparse: struct task_struct *
kernel/sched/alt_core.c:5439:17: sparse: struct task_struct [noderef] __rcu *
kernel/sched/alt_core.c:5984:25: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct task_struct *p @@ got struct task_struct [noderef] __rcu *curr @@
kernel/sched/alt_core.c:5984:25: sparse: expected struct task_struct *p
kernel/sched/alt_core.c:5984:25: sparse: got struct task_struct [noderef] __rcu *curr
kernel/sched/alt_core.c:911:38: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct task_struct *curr @@ got struct task_struct [noderef] __rcu *curr @@
kernel/sched/alt_core.c:911:38: sparse: expected struct task_struct *curr
kernel/sched/alt_core.c:911:38: sparse: got struct task_struct [noderef] __rcu *curr
kernel/sched/alt_core.c:911:38: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct task_struct *curr @@ got struct task_struct [noderef] __rcu *curr @@
kernel/sched/alt_core.c:911:38: sparse: expected struct task_struct *curr
kernel/sched/alt_core.c:911:38: sparse: got struct task_struct [noderef] __rcu *curr
kernel/sched/alt_core.c:1138:37: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/alt_core.c:1138:37: sparse: struct task_struct *
kernel/sched/alt_core.c:1138:37: sparse: struct task_struct [noderef] __rcu *
kernel/sched/alt_core.c:1818:38: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/alt_core.c:1818:38: sparse: struct task_struct [noderef] __rcu *
kernel/sched/alt_core.c:1818:38: sparse: struct task_struct const *
kernel/sched/alt_core.c: note: in included file (through kernel/sched/sched.h):
kernel/sched/alt_sched.h:312:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/alt_sched.h:312:25: sparse: struct task_struct [noderef] __rcu *
kernel/sched/alt_sched.h:312:25: sparse: struct task_struct *
kernel/sched/alt_sched.h:312:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/alt_sched.h:312:25: sparse: struct task_struct [noderef] __rcu *
kernel/sched/alt_sched.h:312:25: sparse: struct task_struct *
kernel/sched/alt_sched.h:312:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/alt_sched.h:312:25: sparse: struct task_struct [noderef] __rcu *
kernel/sched/alt_sched.h:312:25: sparse: struct task_struct *
kernel/sched/alt_sched.h:312:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/alt_sched.h:312:25: sparse: struct task_struct [noderef] __rcu *
kernel/sched/alt_sched.h:312:25: sparse: struct task_struct *
kernel/sched/alt_core.c:1138:37: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/alt_core.c:1138:37: sparse: struct task_struct *
kernel/sched/alt_core.c:1138:37: sparse: struct task_struct [noderef] __rcu *
kernel/sched/alt_core.c:1138:37: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/alt_core.c:1138:37: sparse: struct task_struct *
kernel/sched/alt_core.c:1138:37: sparse: struct task_struct [noderef] __rcu *
kernel/sched/alt_sched.h:312:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/alt_sched.h:312:25: sparse: struct task_struct [noderef] __rcu *
kernel/sched/alt_sched.h:312:25: sparse: struct task_struct *
kernel/sched/alt_core.c:1138:37: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/alt_core.c:1138:37: sparse: struct task_struct *
kernel/sched/alt_core.c:1138:37: sparse: struct task_struct [noderef] __rcu *
kernel/sched/alt_sched.h:312:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/alt_sched.h:312:25: sparse: struct task_struct [noderef] __rcu *
kernel/sched/alt_sched.h:312:25: sparse: struct task_struct *
kernel/sched/alt_core.c:1138:37: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/alt_core.c:1138:37: sparse: struct task_struct *
kernel/sched/alt_core.c:1138:37: sparse: struct task_struct [noderef] __rcu *
kernel/sched/alt_core.c:1138:37: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/alt_core.c:1138:37: sparse: struct task_struct *
kernel/sched/alt_core.c:1138:37: sparse: struct task_struct [noderef] __rcu *
kernel/sched/alt_core.c:1138:37: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/alt_core.c:1138:37: sparse: struct task_struct *
kernel/sched/alt_core.c:1138:37: sparse: struct task_struct [noderef] __rcu *
vim +/rt_mutex_futex_pre_schedule +5356 kernel/sched/alt_core.c
5351
5352 /*
5353 * Used within the futex syscall context, skips sched_submit_work() because none
5354 * its work will be done. Asserts ensure that it is indeed the case.
5355 */
> 5356 void rt_mutex_futex_pre_schedule(void)
5357 {
5358 lockdep_assert(!(current->flags & (PF_WQ_WORKER | PF_IO_WORKER)));
5359 lockdep_assert(!current->plug);
5360 lockdep_assert(!fetch_and_set(current->sched_rt_mutex, 1));
5361 }
5362
5363 void rt_mutex_schedule(void)
5364 {
5365 lockdep_assert(current->sched_rt_mutex);
5366 __schedule_loop(SM_NONE);
5367 }
5368
5369 void rt_mutex_post_schedule(void)
5370 {
5371 sched_update_worker(current);
5372 lockdep_assert(fetch_and_set(current->sched_rt_mutex, 0));
5373 }
5374
> 5375 void rt_mutex_futex_post_schedule(void)
5376 {
5377 lockdep_assert(fetch_and_set(current->sched_rt_mutex, 0));
5378 }
5379
--
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https://github.com/intel/lkp-tests/wiki
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2026-10-07 22:28 [zen:7.2/prjc 118/124] kernel/sched/alt_core.c:5356:6: sparse: sparse: symbol 'rt_mutex_futex_pre_schedule' was not declared. Should it be static? kernel test robot
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