Re: [PATCH v3 6/7] sched: Implement shared runqueue in CFS

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

Hi David,

kernel test robot noticed the following build errors:

[auto build test ERROR on tip/sched/core]
[cannot apply to linus/master v6.5-rc5 next-20230809]
[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/David-Vernet/sched-Expose-move_queued_task-from-core-c/20230810-061611
base:   tip/sched/core
patch link:    https://lore.kernel.org/r/20230809221218.163894-7-void%40manifault.com
patch subject: [PATCH v3 6/7] sched: Implement shared runqueue in CFS
config: hexagon-randconfig-r045-20230809 (https://download.01.org/0day-ci/archive/20230810/202308101547.1n2K9PyC-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a)
reproduce: (https://download.01.org/0day-ci/archive/20230810/202308101547.1n2K9PyC-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/202308101547.1n2K9PyC-lkp@intel.com/

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

   In file included from kernel/sched/core.c:9:
   In file included from include/linux/highmem.h:12:
   In file included from include/linux/hardirq.h:11:
   In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
   In file included from include/asm-generic/hardirq.h:17:
   In file included from include/linux/irq.h:20:
   In file included from include/linux/io.h:13:
   In file included from arch/hexagon/include/asm/io.h:334:
   include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     547 |         val = __raw_readb(PCI_IOBASE + addr);
         |                           ~~~~~~~~~~ ^
   include/asm-generic/io.h:560:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     560 |         val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
         |                                                         ~~~~~~~~~~ ^
   include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
      37 | #define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
         |                                                   ^
   In file included from kernel/sched/core.c:9:
   In file included from include/linux/highmem.h:12:
   In file included from include/linux/hardirq.h:11:
   In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
   In file included from include/asm-generic/hardirq.h:17:
   In file included from include/linux/irq.h:20:
   In file included from include/linux/io.h:13:
   In file included from arch/hexagon/include/asm/io.h:334:
   include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     573 |         val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
         |                                                         ~~~~~~~~~~ ^
   include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
      35 | #define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
         |                                                   ^
   In file included from kernel/sched/core.c:9:
   In file included from include/linux/highmem.h:12:
   In file included from include/linux/hardirq.h:11:
   In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
   In file included from include/asm-generic/hardirq.h:17:
   In file included from include/linux/irq.h:20:
   In file included from include/linux/io.h:13:
   In file included from arch/hexagon/include/asm/io.h:334:
   include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     584 |         __raw_writeb(value, PCI_IOBASE + addr);
         |                             ~~~~~~~~~~ ^
   include/asm-generic/io.h:594:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     594 |         __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
         |                                                       ~~~~~~~~~~ ^
   include/asm-generic/io.h:604:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     604 |         __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
         |                                                       ~~~~~~~~~~ ^
>> kernel/sched/core.c:9768:6: warning: no previous prototype for function 'sched_update_domains' [-Wmissing-prototypes]
    9768 | void sched_update_domains(void)
         |      ^
   kernel/sched/core.c:9768:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    9768 | void sched_update_domains(void)
         | ^
         | static 
   kernel/sched/core.c:2467:20: warning: unused function 'rq_has_pinned_tasks' [-Wunused-function]
    2467 | static inline bool rq_has_pinned_tasks(struct rq *rq)
         |                    ^
   kernel/sched/core.c:5818:20: warning: unused function 'sched_tick_stop' [-Wunused-function]
    5818 | static inline void sched_tick_stop(int cpu) { }
         |                    ^
   kernel/sched/core.c:6519:20: warning: unused function 'sched_core_cpu_deactivate' [-Wunused-function]
    6519 | static inline void sched_core_cpu_deactivate(unsigned int cpu) {}
         |                    ^
   kernel/sched/core.c:6520:20: warning: unused function 'sched_core_cpu_dying' [-Wunused-function]
    6520 | static inline void sched_core_cpu_dying(unsigned int cpu) {}
         |                    ^
   kernel/sched/core.c:9570:20: warning: unused function 'balance_hotplug_wait' [-Wunused-function]
    9570 | static inline void balance_hotplug_wait(void)
         |                    ^
   12 warnings generated.
--
   In file included from kernel/sched/build_utility.c:15:
   In file included from include/linux/sched/isolation.h:6:
   In file included from include/linux/tick.h:8:
   In file included from include/linux/clockchips.h:14:
   In file included from include/linux/clocksource.h:22:
   In file included from arch/hexagon/include/asm/io.h:334:
   include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     547 |         val = __raw_readb(PCI_IOBASE + addr);
         |                           ~~~~~~~~~~ ^
   include/asm-generic/io.h:560:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     560 |         val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
         |                                                         ~~~~~~~~~~ ^
   include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
      37 | #define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
         |                                                   ^
   In file included from kernel/sched/build_utility.c:15:
   In file included from include/linux/sched/isolation.h:6:
   In file included from include/linux/tick.h:8:
   In file included from include/linux/clockchips.h:14:
   In file included from include/linux/clocksource.h:22:
   In file included from arch/hexagon/include/asm/io.h:334:
   include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     573 |         val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
         |                                                         ~~~~~~~~~~ ^
   include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
      35 | #define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
         |                                                   ^
   In file included from kernel/sched/build_utility.c:15:
   In file included from include/linux/sched/isolation.h:6:
   In file included from include/linux/tick.h:8:
   In file included from include/linux/clockchips.h:14:
   In file included from include/linux/clocksource.h:22:
   In file included from arch/hexagon/include/asm/io.h:334:
   include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     584 |         __raw_writeb(value, PCI_IOBASE + addr);
         |                             ~~~~~~~~~~ ^
   include/asm-generic/io.h:594:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     594 |         __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
         |                                                       ~~~~~~~~~~ ^
   include/asm-generic/io.h:604:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     604 |         __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
         |                                                       ~~~~~~~~~~ ^
   In file included from kernel/sched/build_utility.c:89:
>> kernel/sched/topology.c:2580:3: error: call to undeclared function 'sched_update_domains'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    2580 |                 sched_update_domains();
         |                 ^
   kernel/sched/topology.c:2746:2: error: call to undeclared function 'sched_update_domains'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    2746 |         sched_update_domains();
         |         ^
   6 warnings and 2 errors generated.


vim +/sched_update_domains +2580 kernel/sched/topology.c

  2558	
  2559	/*
  2560	 * Set up scheduler domains and groups.  For now this just excludes isolated
  2561	 * CPUs, but could be used to exclude other special cases in the future.
  2562	 */
  2563	int __init sched_init_domains(const struct cpumask *cpu_map)
  2564	{
  2565		int err;
  2566	
  2567		zalloc_cpumask_var(&sched_domains_tmpmask, GFP_KERNEL);
  2568		zalloc_cpumask_var(&sched_domains_tmpmask2, GFP_KERNEL);
  2569		zalloc_cpumask_var(&fallback_doms, GFP_KERNEL);
  2570	
  2571		arch_update_cpu_topology();
  2572		asym_cpu_capacity_scan();
  2573		ndoms_cur = 1;
  2574		doms_cur = alloc_sched_domains(ndoms_cur);
  2575		if (!doms_cur)
  2576			doms_cur = &fallback_doms;
  2577		cpumask_and(doms_cur[0], cpu_map, housekeeping_cpumask(HK_TYPE_DOMAIN));
  2578		err = build_sched_domains(doms_cur[0], NULL);
  2579		if (!err)
> 2580			sched_update_domains();
  2581	
  2582		return err;
  2583	}
  2584	

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