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[PATCH 2/2] mm: tlb: add tlb swap entries batch async release To: kernel test robot , Andrew Morton , linux-kernel@vger.kernel.org, Will Deacon , "Aneesh Kumar K.V" , Nick Piggin , Peter Zijlstra , Arnd Bergmann , Johannes Weiner , Michal Hocko , Roman Gushchin , Shakeel Butt , Muchun Song , linux-arch@vger.kernel.org, cgroups@vger.kernel.org, Barry Song <21cnbao@gmail.com> Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev, Linux Memory Management List , opensource.kernel@vivo.com References: <20240730114426.511-3-justinjiang@vivo.com> <202407311703.8q8sDQ2p-lkp@intel.com> From: zhiguojiang In-Reply-To: <202407311703.8q8sDQ2p-lkp@intel.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-ClientProxiedBy: SG3P274CA0007.SGPP274.PROD.OUTLOOK.COM (2603:1096:4:be::19) To JH0PR06MB6849.apcprd06.prod.outlook.com (2603:1096:990:47::12) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: JH0PR06MB6849:EE_|SEYPR06MB6904:EE_ 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Learn why this is important at https://aka.ms/LearnAboutSenderIdentification ] > > 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@intel.com/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@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 > | Closes: https://lore.kernel.org/oe-kbuild-all/202407311703.8q8sDQ2p-lkp@intel.com/ 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@vivo.com/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. > .. > > -- > 0-DAY CI Kernel Test Service > https://github.com/intel/lkp-tests/wiki