Re: [PATCH 2/2] mm: tlb: add tlb swap entries batch async release

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在 2024/7/31 17:55, kernel test robot 写道:
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Hi Zhiguo,

kernel test robot noticed the following build errors:

[auto build test ERROR on akpm-mm/mm-everything]

url:    https://github.com/intel-lab-lkp/linux/commits/Zhiguo-Jiang/mm-move-task_is_dying-to-h-headfile/20240730-215136
base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
patch link:    https://lore.kernel.org/r/20240730114426.511-3-justinjiang%40vivo.com
patch subject: [PATCH 2/2] mm: tlb: add tlb swap entries batch async release
config: s390-allnoconfig (https://download.01.org/0day-ci/archive/20240731/202407311703.8q8sDQ2p-lkp@xxxxxxxxx/config)
compiler: clang version 20.0.0git (https://github.com/llvm/llvm-project ccae7b461be339e717d02f99ac857cf0bc7d17fc)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240731/202407311703.8q8sDQ2p-lkp@xxxxxxxxx/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@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202407311703.8q8sDQ2p-lkp@xxxxxxxxx/
Hi,

I have fixed the arch s390 config compilation warning in v2. Please kindly help to test again.
https://lore.kernel.org/linux-mm/20240731133318.527-1-justinjiang@xxxxxxxx/T/#t

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

    In file included from arch/s390/mm/init.c:17:
    In file included from include/linux/ptrace.h:10:
    In file included from include/linux/pid_namespace.h:7:
    In file included from include/linux/mm.h:2234:
    include/linux/vmstat.h:514:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
      514 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
          |                               ~~~~~~~~~~~ ^ ~~~
    In file included from arch/s390/mm/init.c:25:
    In file included from include/linux/memblock.h:13:
    In file included from arch/s390/include/asm/dma.h:5:
    In file included from include/linux/io.h:14:
    In file included from arch/s390/include/asm/io.h:93:
    include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
      548 |         val = __raw_readb(PCI_IOBASE + addr);
          |                           ~~~~~~~~~~ ^
    include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
      561 |         val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
          |                                                         ~~~~~~~~~~ ^
    include/uapi/linux/byteorder/big_endian.h:37:59: note: expanded from macro '__le16_to_cpu'
       37 | #define __le16_to_cpu(x) __swab16((__force __u16)(__le16)(x))
          |                                                           ^
    include/uapi/linux/swab.h:102:54: note: expanded from macro '__swab16'
      102 | #define __swab16(x) (__u16)__builtin_bswap16((__u16)(x))
          |                                                      ^
    In file included from arch/s390/mm/init.c:25:
    In file included from include/linux/memblock.h:13:
    In file included from arch/s390/include/asm/dma.h:5:
    In file included from include/linux/io.h:14:
    In file included from arch/s390/include/asm/io.h:93:
    include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
      574 |         val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
          |                                                         ~~~~~~~~~~ ^
    include/uapi/linux/byteorder/big_endian.h:35:59: note: expanded from macro '__le32_to_cpu'
       35 | #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x))
          |                                                           ^
    include/uapi/linux/swab.h:115:54: note: expanded from macro '__swab32'
      115 | #define __swab32(x) (__u32)__builtin_bswap32((__u32)(x))
          |                                                      ^
    In file included from arch/s390/mm/init.c:25:
    In file included from include/linux/memblock.h:13:
    In file included from arch/s390/include/asm/dma.h:5:
    In file included from include/linux/io.h:14:
    In file included from arch/s390/include/asm/io.h:93:
    include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
      585 |         __raw_writeb(value, PCI_IOBASE + addr);
          |                             ~~~~~~~~~~ ^
    include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
      595 |         __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
          |                                                       ~~~~~~~~~~ ^
    include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
      605 |         __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
          |                                                       ~~~~~~~~~~ ^
    include/asm-generic/io.h:693:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
      693 |         readsb(PCI_IOBASE + addr, buffer, count);
          |                ~~~~~~~~~~ ^
    include/asm-generic/io.h:701:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
      701 |         readsw(PCI_IOBASE + addr, buffer, count);
          |                ~~~~~~~~~~ ^
    include/asm-generic/io.h:709:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
      709 |         readsl(PCI_IOBASE + addr, buffer, count);
          |                ~~~~~~~~~~ ^
    include/asm-generic/io.h:718:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
      718 |         writesb(PCI_IOBASE + addr, buffer, count);
          |                 ~~~~~~~~~~ ^
    include/asm-generic/io.h:727:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
      727 |         writesw(PCI_IOBASE + addr, buffer, count);
          |                 ~~~~~~~~~~ ^
    include/asm-generic/io.h:736:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
      736 |         writesl(PCI_IOBASE + addr, buffer, count);
          |                 ~~~~~~~~~~ ^
    In file included from arch/s390/mm/init.c:42:
    In file included from arch/s390/include/asm/tlb.h:39:
include/asm-generic/tlb.h:327:6: warning: no previous prototype for function '__tlb_remove_swap_entries' [-Wmissing-prototypes]
      327 | bool __tlb_remove_swap_entries(struct mmu_gather *tlb,
          |      ^
    include/asm-generic/tlb.h:327:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
      327 | bool __tlb_remove_swap_entries(struct mmu_gather *tlb,
          | ^
          | static
    14 warnings generated.
--
    In file included from arch/s390/mm/pgtable.c:11:
    In file included from include/linux/mm.h:2234:
    include/linux/vmstat.h:514:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
      514 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
          |                               ~~~~~~~~~~~ ^ ~~~
    In file included from arch/s390/mm/pgtable.c:22:
    In file included from arch/s390/include/asm/tlb.h:39:
include/asm-generic/tlb.h:327:6: warning: no previous prototype for function '__tlb_remove_swap_entries' [-Wmissing-prototypes]
      327 | bool __tlb_remove_swap_entries(struct mmu_gather *tlb,
          |      ^
    include/asm-generic/tlb.h:327:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
      327 | bool __tlb_remove_swap_entries(struct mmu_gather *tlb,
          | ^
          | static
    2 warnings generated.
--
    In file included from mm/memory.c:44:
    In file included from include/linux/mm.h:2234:
    include/linux/vmstat.h:514:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
      514 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
          |                               ~~~~~~~~~~~ ^ ~~~
    In file included from mm/memory.c:45:
    include/linux/mm_inline.h:47:41: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
       47 |         __mod_lruvec_state(lruvec, NR_LRU_BASE + lru, nr_pages);
          |                                    ~~~~~~~~~~~ ^ ~~~
    include/linux/mm_inline.h:49:22: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
       49 |                                 NR_ZONE_LRU_BASE + lru, nr_pages);
          |                                 ~~~~~~~~~~~~~~~~ ^ ~~~
    In file included from mm/memory.c:84:
    In file included from arch/s390/include/asm/io.h:93:
    include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
      548 |         val = __raw_readb(PCI_IOBASE + addr);
          |                           ~~~~~~~~~~ ^
    include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
      561 |         val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
          |                                                         ~~~~~~~~~~ ^
    include/uapi/linux/byteorder/big_endian.h:37:59: note: expanded from macro '__le16_to_cpu'
       37 | #define __le16_to_cpu(x) __swab16((__force __u16)(__le16)(x))
          |                                                           ^
    include/uapi/linux/swab.h:102:54: note: expanded from macro '__swab16'
      102 | #define __swab16(x) (__u16)__builtin_bswap16((__u16)(x))
          |                                                      ^
    In file included from mm/memory.c:84:
    In file included from arch/s390/include/asm/io.h:93:
    include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
      574 |         val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
          |                                                         ~~~~~~~~~~ ^
    include/uapi/linux/byteorder/big_endian.h:35:59: note: expanded from macro '__le32_to_cpu'
       35 | #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x))
          |                                                           ^
    include/uapi/linux/swab.h:115:54: note: expanded from macro '__swab32'
      115 | #define __swab32(x) (__u32)__builtin_bswap32((__u32)(x))
          |                                                      ^
    In file included from mm/memory.c:84:
    In file included from arch/s390/include/asm/io.h:93:
    include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
      585 |         __raw_writeb(value, PCI_IOBASE + addr);
          |                             ~~~~~~~~~~ ^
    include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
      595 |         __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
          |                                                       ~~~~~~~~~~ ^
    include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
      605 |         __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
          |                                                       ~~~~~~~~~~ ^
    include/asm-generic/io.h:693:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
      693 |         readsb(PCI_IOBASE + addr, buffer, count);
          |                ~~~~~~~~~~ ^
    include/asm-generic/io.h:701:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
      701 |         readsw(PCI_IOBASE + addr, buffer, count);
          |                ~~~~~~~~~~ ^
    include/asm-generic/io.h:709:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
      709 |         readsl(PCI_IOBASE + addr, buffer, count);
          |                ~~~~~~~~~~ ^
    include/asm-generic/io.h:718:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
      718 |         writesb(PCI_IOBASE + addr, buffer, count);
          |                 ~~~~~~~~~~ ^
    include/asm-generic/io.h:727:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
      727 |         writesw(PCI_IOBASE + addr, buffer, count);
          |                 ~~~~~~~~~~ ^
    include/asm-generic/io.h:736:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
      736 |         writesl(PCI_IOBASE + addr, buffer, count);
          |                 ~~~~~~~~~~ ^
    In file included from mm/memory.c:88:
    In file included from arch/s390/include/asm/tlb.h:39:
include/asm-generic/tlb.h:327:6: warning: no previous prototype for function '__tlb_remove_swap_entries' [-Wmissing-prototypes]
      327 | bool __tlb_remove_swap_entries(struct mmu_gather *tlb,
          |      ^
    include/asm-generic/tlb.h:327:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
      327 | bool __tlb_remove_swap_entries(struct mmu_gather *tlb,
          | ^
          | static
    16 warnings generated.
--
    In file included from mm/mmap.c:14:
    In file included from include/linux/backing-dev.h:15:
    In file included from include/linux/device.h:32:
    In file included from include/linux/device/driver.h:21:
    In file included from include/linux/module.h:19:
    In file included from include/linux/elf.h:6:
    In file included from arch/s390/include/asm/elf.h:181:
    In file included from arch/s390/include/asm/mmu_context.h:11:
    In file included from arch/s390/include/asm/pgalloc.h:18:
    In file included from include/linux/mm.h:2234:
    include/linux/vmstat.h:514:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
      514 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
          |                               ~~~~~~~~~~~ ^ ~~~
    In file included from mm/mmap.c:16:
    include/linux/mm_inline.h:47:41: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
       47 |         __mod_lruvec_state(lruvec, NR_LRU_BASE + lru, nr_pages);
          |                                    ~~~~~~~~~~~ ^ ~~~
    include/linux/mm_inline.h:49:22: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
       49 |                                 NR_ZONE_LRU_BASE + lru, nr_pages);
          |                                 ~~~~~~~~~~~~~~~~ ^ ~~~
    In file included from mm/mmap.c:53:
    In file included from arch/s390/include/asm/tlb.h:39:
include/asm-generic/tlb.h:327:6: warning: no previous prototype for function '__tlb_remove_swap_entries' [-Wmissing-prototypes]
      327 | bool __tlb_remove_swap_entries(struct mmu_gather *tlb,
          |      ^
    include/asm-generic/tlb.h:327:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
      327 | bool __tlb_remove_swap_entries(struct mmu_gather *tlb,
          | ^
          | static
    4 warnings generated.
--
    In file included from mm/mremap.c:11:
    In file included from include/linux/mm.h:2234:
    include/linux/vmstat.h:514:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
      514 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
          |                               ~~~~~~~~~~~ ^ ~~~
    In file included from mm/mremap.c:12:
    include/linux/mm_inline.h:47:41: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
       47 |         __mod_lruvec_state(lruvec, NR_LRU_BASE + lru, nr_pages);
          |                                    ~~~~~~~~~~~ ^ ~~~
    include/linux/mm_inline.h:49:22: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
       49 |                                 NR_ZONE_LRU_BASE + lru, nr_pages);
          |                                 ~~~~~~~~~~~~~~~~ ^ ~~~
    In file included from mm/mremap.c:30:
    In file included from arch/s390/include/asm/tlb.h:39:
include/asm-generic/tlb.h:327:6: warning: no previous prototype for function '__tlb_remove_swap_entries' [-Wmissing-prototypes]
      327 | bool __tlb_remove_swap_entries(struct mmu_gather *tlb,
          |      ^
    include/asm-generic/tlb.h:327:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
      327 | bool __tlb_remove_swap_entries(struct mmu_gather *tlb,
          | ^
          | static
    mm/mremap.c:228:20: warning: unused function 'arch_supports_page_table_move' [-Wunused-function]
      228 | static inline bool arch_supports_page_table_move(void)
          |                    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    mm/mremap.c:227:39: note: expanded from macro 'arch_supports_page_table_move'
      227 | #define arch_supports_page_table_move arch_supports_page_table_move
          |                                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    5 warnings generated.
--
    In file included from kernel/sched/core.c:10:
    In file included from include/linux/highmem.h:10:
    In file included from include/linux/mm.h:2234:
    include/linux/vmstat.h:514:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
      514 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
          |                               ~~~~~~~~~~~ ^ ~~~
    In file included from kernel/sched/core.c:34:
    In file included from include/linux/sched/isolation.h:7:
    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/s390/include/asm/io.h:93:
    include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
      548 |         val = __raw_readb(PCI_IOBASE + addr);
          |                           ~~~~~~~~~~ ^
    include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
      561 |         val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
          |                                                         ~~~~~~~~~~ ^
    include/uapi/linux/byteorder/big_endian.h:37:59: note: expanded from macro '__le16_to_cpu'
       37 | #define __le16_to_cpu(x) __swab16((__force __u16)(__le16)(x))
          |                                                           ^
    include/uapi/linux/swab.h:102:54: note: expanded from macro '__swab16'
      102 | #define __swab16(x) (__u16)__builtin_bswap16((__u16)(x))
          |                                                      ^
    In file included from kernel/sched/core.c:34:
    In file included from include/linux/sched/isolation.h:7:
    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/s390/include/asm/io.h:93:
    include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
      574 |         val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
          |                                                         ~~~~~~~~~~ ^
    include/uapi/linux/byteorder/big_endian.h:35:59: note: expanded from macro '__le32_to_cpu'
       35 | #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x))
          |                                                           ^
    include/uapi/linux/swab.h:115:54: note: expanded from macro '__swab32'
      115 | #define __swab32(x) (__u32)__builtin_bswap32((__u32)(x))
          |                                                      ^
    In file included from kernel/sched/core.c:34:
    In file included from include/linux/sched/isolation.h:7:
    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/s390/include/asm/io.h:93:
    include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
      585 |         __raw_writeb(value, PCI_IOBASE + addr);
          |                             ~~~~~~~~~~ ^
    include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
      595 |         __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
          |                                                       ~~~~~~~~~~ ^
    include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
      605 |         __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
          |                                                       ~~~~~~~~~~ ^
    include/asm-generic/io.h:693:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
      693 |         readsb(PCI_IOBASE + addr, buffer, count);
          |                ~~~~~~~~~~ ^
    include/asm-generic/io.h:701:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
      701 |         readsw(PCI_IOBASE + addr, buffer, count);
          |                ~~~~~~~~~~ ^
    include/asm-generic/io.h:709:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
      709 |         readsl(PCI_IOBASE + addr, buffer, count);
          |                ~~~~~~~~~~ ^
    include/asm-generic/io.h:718:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
      718 |         writesb(PCI_IOBASE + addr, buffer, count);
          |                 ~~~~~~~~~~ ^
    include/asm-generic/io.h:727:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
      727 |         writesw(PCI_IOBASE + addr, buffer, count);
          |                 ~~~~~~~~~~ ^
    include/asm-generic/io.h:736:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
      736 |         writesl(PCI_IOBASE + addr, buffer, count);
          |                 ~~~~~~~~~~ ^
    In file included from kernel/sched/core.c:80:
    In file included from arch/s390/include/asm/tlb.h:39:
include/asm-generic/tlb.h:327:6: warning: no previous prototype for function '__tlb_remove_swap_entries' [-Wmissing-prototypes]
      327 | bool __tlb_remove_swap_entries(struct mmu_gather *tlb,
          |      ^
    include/asm-generic/tlb.h:327:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
      327 | bool __tlb_remove_swap_entries(struct mmu_gather *tlb,
          | ^
          | static
    kernel/sched/core.c:6330:20: warning: unused function 'sched_core_cpu_deactivate' [-Wunused-function]
     6330 | static inline void sched_core_cpu_deactivate(unsigned int cpu) {}
          |                    ^~~~~~~~~~~~~~~~~~~~~~~~~
    15 warnings generated.
..

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