tree: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-stable head: 2b76550922a81fd63e16b81b6b39f1eb19df52f0 commit: a39744c1a652d8847098d9f1a022b50a9ceb3f10 [175/204] mm/list_lru: remove unused function config: um-allnoconfig (https://download.01.org/0day-ci/archive/20231007/202310072139.CXKkky51-lkp@xxxxxxxxx/config) compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231007/202310072139.CXKkky51-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/202310072139.CXKkky51-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): In file included from mm/list_lru.c:14: In file included from include/linux/memcontrol.h:13: In file included from include/linux/cgroup.h:26: In file included from include/linux/kernel_stat.h:9: In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:11: In file included from arch/um/include/asm/hardirq.h:5: 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/um/include/asm/io.h:24: 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 mm/list_lru.c:14: In file included from include/linux/memcontrol.h:13: In file included from include/linux/cgroup.h:26: In file included from include/linux/kernel_stat.h:9: In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:11: In file included from arch/um/include/asm/hardirq.h:5: 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/um/include/asm/io.h:24: 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 mm/list_lru.c:14: In file included from include/linux/memcontrol.h:13: In file included from include/linux/cgroup.h:26: In file included from include/linux/kernel_stat.h:9: In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:11: In file included from arch/um/include/asm/hardirq.h:5: 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/um/include/asm/io.h:24: 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); | ~~~~~~~~~~ ^ include/asm-generic/io.h:692:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 692 | readsb(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:700:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 700 | readsw(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:708:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 708 | readsl(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:717:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 717 | writesb(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:726:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 726 | writesw(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:735:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 735 | writesl(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ >> mm/list_lru.c:98:7: error: call to undeclared function 'list_lru_from_kmem'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 98 | l = list_lru_from_kmem(lru, nid, item, &memcg); | ^ >> mm/list_lru.c:98:5: error: incompatible integer to pointer conversion assigning to 'struct list_lru_one *' from 'int' [-Wint-conversion] 98 | l = list_lru_from_kmem(lru, nid, item, &memcg); | ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ mm/list_lru.c:121:7: error: call to undeclared function 'list_lru_from_kmem'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 121 | l = list_lru_from_kmem(lru, nid, item, NULL); | ^ mm/list_lru.c:121:5: error: incompatible integer to pointer conversion assigning to 'struct list_lru_one *' from 'int' [-Wint-conversion] 121 | l = list_lru_from_kmem(lru, nid, item, NULL); | ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 12 warnings and 4 errors generated. vim +/list_lru_from_kmem +98 mm/list_lru.c 60d3fd32a7a9da Vladimir Davydov 2015-02-12 88 a38e40824844a5 Dave Chinner 2013-08-28 89 bool list_lru_add(struct list_lru *lru, struct list_head *item) a38e40824844a5 Dave Chinner 2013-08-28 90 { 3b1d58a4c96799 Dave Chinner 2013-08-28 91 int nid = page_to_nid(virt_to_page(item)); 3b1d58a4c96799 Dave Chinner 2013-08-28 92 struct list_lru_node *nlru = &lru->node[nid]; fae91d6d8be5e2 Kirill Tkhai 2018-08-17 93 struct mem_cgroup *memcg; 60d3fd32a7a9da Vladimir Davydov 2015-02-12 94 struct list_lru_one *l; 3b1d58a4c96799 Dave Chinner 2013-08-28 95 3b1d58a4c96799 Dave Chinner 2013-08-28 96 spin_lock(&nlru->lock); a38e40824844a5 Dave Chinner 2013-08-28 97 if (list_empty(item)) { 6a6b7b77cc0fdc Muchun Song 2022-03-22 @98 l = list_lru_from_kmem(lru, nid, item, &memcg); 60d3fd32a7a9da Vladimir Davydov 2015-02-12 99 list_add_tail(item, &l->list); fae91d6d8be5e2 Kirill Tkhai 2018-08-17 100 /* Set shrinker bit if the first element was added */ fae91d6d8be5e2 Kirill Tkhai 2018-08-17 101 if (!l->nr_items++) 2bfd36374edd9e Yang Shi 2021-05-04 102 set_shrinker_bit(memcg, nid, fae91d6d8be5e2 Kirill Tkhai 2018-08-17 103 lru_shrinker_id(lru)); 2c80cd57c74339 Sahitya Tummala 2017-07-10 104 nlru->nr_items++; 3b1d58a4c96799 Dave Chinner 2013-08-28 105 spin_unlock(&nlru->lock); a38e40824844a5 Dave Chinner 2013-08-28 106 return true; a38e40824844a5 Dave Chinner 2013-08-28 107 } 3b1d58a4c96799 Dave Chinner 2013-08-28 108 spin_unlock(&nlru->lock); a38e40824844a5 Dave Chinner 2013-08-28 109 return false; a38e40824844a5 Dave Chinner 2013-08-28 110 } a38e40824844a5 Dave Chinner 2013-08-28 111 EXPORT_SYMBOL_GPL(list_lru_add); a38e40824844a5 Dave Chinner 2013-08-28 112 :::::: The code at line 98 was first introduced by commit :::::: 6a6b7b77cc0fdc13f50c66c219c8c05500a8dfce mm: list_lru: transpose the array of per-node per-memcg lru lists :::::: TO: Muchun Song <songmuchun@xxxxxxxxxxxxx> :::::: CC: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
