Hi Suren, kernel test robot noticed the following build warnings: [auto build test WARNING on 931086f2a88086319afb57cd3925607e8cda0a9f] url: https://github.com/intel-lab-lkp/linux/commits/Suren-Baghdasaryan/mm-introduce-vma_start_read_locked-_nested-helpers/20241112-050531 base: 931086f2a88086319afb57cd3925607e8cda0a9f patch link: https://lore.kernel.org/r/20241111205506.3404479-3-surenb%40google.com patch subject: [PATCH 2/4] mm: move per-vma lock into vm_area_struct config: um-defconfig (https://download.01.org/0day-ci/archive/20241112/202411121742.VK3YF84e-lkp@xxxxxxxxx/config) compiler: clang version 20.0.0git (https://github.com/llvm/llvm-project 592c0fe55f6d9a811028b5f3507be91458ab2713) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241112/202411121742.VK3YF84e-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/202411121742.VK3YF84e-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): | ^ In file included from ipc/msg.c:30: In file included from include/linux/mm.h:1143: In file included from include/linux/huge_mm.h:7: In file included from include/linux/fs.h:33: In file included from include/linux/percpu-rwsem.h:7: In file included from include/linux/rcuwait.h:6: In file included from include/linux/sched/signal.h:6: include/linux/signal.h:255:10: warning: array index 1 is past the end of the array (that has type 'unsigned long[1]') [-Warray-bounds] 255 | case 2: set->sig[1] = -1; | ^ ~ arch/x86/include/asm/signal.h:24:2: note: array 'sig' declared here 24 | unsigned long sig[_NSIG_WORDS]; | ^ In file included from ipc/msg.c:30: In file included from include/linux/mm.h:2234: include/linux/vmstat.h:518:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion] 518 | return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_" | ~~~~~~~~~~~ ^ ~~~ In file included from ipc/msg.c:33: In file included from include/linux/security.h:35: In file included from include/linux/bpf.h:31: 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:8: 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:14: In file included from arch/um/include/asm/io.h:24: 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/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 ipc/msg.c:33: In file included from include/linux/security.h:35: In file included from include/linux/bpf.h:31: 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:8: 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:14: In file included from arch/um/include/asm/io.h:24: 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/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 ipc/msg.c:33: In file included from include/linux/security.h:35: In file included from include/linux/bpf.h:31: 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:8: 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:14: In file included from arch/um/include/asm/io.h:24: 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); | ~~~~~~~~~~ ^ >> ipc/msg.c:497:20: warning: implicit conversion from 'int' to 'unsigned short' changes value from 32768000 to 0 [-Wconstant-conversion] 497 | msginfo->msgseg = MSGSEG; | ~ ^~~~~~ include/uapi/linux/msg.h:87:38: note: expanded from macro 'MSGSEG' 87 | #define MSGSEG (__MSGSEG <= 0xffff ? __MSGSEG : 0xffff) | ^~~~~~~~ include/uapi/linux/msg.h:86:36: note: expanded from macro '__MSGSEG' 86 | #define __MSGSEG ((MSGPOOL * 1024) / MSGSSZ) /* max no. of segments */ | ~~~~~~~~~~~~~~~~~^~~~~~~~ 63 warnings and 3 errors generated. -- In file included from drivers/tty/tty_port.c:8: In file included from include/linux/tty.h:11: In file included from include/linux/tty_port.h:5: In file included from include/linux/kfifo.h:40: In file included from include/linux/dma-mapping.h:11: In file included from include/linux/scatterlist.h:8: include/linux/mm.h:877:2: error: call to undeclared function 'vma_lock_init'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 877 | vma_lock_init(&vma->vm_lock); | ^ include/linux/mm.h:877:2: note: did you mean 'osq_lock_init'? include/linux/osq_lock.h:23:20: note: 'osq_lock_init' declared here 23 | static inline void osq_lock_init(struct optimistic_spin_queue *lock) | ^ In file included from drivers/tty/tty_port.c:8: In file included from include/linux/tty.h:11: In file included from include/linux/tty_port.h:5: In file included from include/linux/kfifo.h:40: In file included from include/linux/dma-mapping.h:11: In file included from include/linux/scatterlist.h:8: include/linux/mm.h:877:22: error: no member named 'vm_lock' in 'struct vm_area_struct' 877 | vma_lock_init(&vma->vm_lock); | ~~~ ^ include/linux/mm.h:878:7: error: no member named 'vm_lock_seq' in 'struct vm_area_struct' 878 | vma->vm_lock_seq = UINT_MAX; | ~~~ ^ In file included from drivers/tty/tty_port.c:8: In file included from include/linux/tty.h:11: In file included from include/linux/tty_port.h:5: In file included from include/linux/kfifo.h:40: In file included from include/linux/dma-mapping.h:11: In file included from include/linux/scatterlist.h:8: In file included from include/linux/mm.h:2234: include/linux/vmstat.h:518:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion] 518 | return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_" | ~~~~~~~~~~~ ^ ~~~ In file included from drivers/tty/tty_port.c:8: In file included from include/linux/tty.h:11: In file included from include/linux/tty_port.h:5: In file included from include/linux/kfifo.h:40: In file included from include/linux/dma-mapping.h:11: In file included from include/linux/scatterlist.h:9: In file included from arch/um/include/asm/io.h:24: 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/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 drivers/tty/tty_port.c:8: In file included from include/linux/tty.h:11: In file included from include/linux/tty_port.h:5: In file included from include/linux/kfifo.h:40: In file included from include/linux/dma-mapping.h:11: In file included from include/linux/scatterlist.h:9: In file included from arch/um/include/asm/io.h:24: 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/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 drivers/tty/tty_port.c:8: In file included from include/linux/tty.h:11: In file included from include/linux/tty_port.h:5: In file included from include/linux/kfifo.h:40: In file included from include/linux/dma-mapping.h:11: In file included from include/linux/scatterlist.h:9: In file included from arch/um/include/asm/io.h:24: 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); | ~~~~~~~~~~ ^ >> drivers/tty/tty_port.c:266:2: warning: implicit conversion from 'unsigned long' to 'unsigned int' changes value from 18446744073709551615 to 4294967295 [-Wconstant-conversion] 266 | INIT_KFIFO(port->xmit_fifo); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/kfifo.h:136:69: note: expanded from macro 'INIT_KFIFO' 136 | __kfifo->mask = __is_kfifo_ptr(__tmp) ? 0 : ARRAY_SIZE(__tmp->buf) - 1;\ | ~ ~~~~~~~~~~~~~~~~~~~~~~~^~~ 14 warnings and 3 errors generated. vim +497 ipc/msg.c a0d092fc2df845 Pierre Peiffer 2008-04-29 476 156d9ed1260ee5 Al Viro 2017-07-09 477 static int msgctl_info(struct ipc_namespace *ns, int msqid, 156d9ed1260ee5 Al Viro 2017-07-09 478 int cmd, struct msginfo *msginfo) a0d092fc2df845 Pierre Peiffer 2008-04-29 479 { 2cafed30f150f7 Davidlohr Bueso 2013-07-08 480 int err; 27c331a1746142 Manfred Spraul 2018-08-21 481 int max_idx; 5a06a363ef4844 Ingo Molnar 2006-07-30 482 5a06a363ef4844 Ingo Molnar 2006-07-30 483 /* 5a06a363ef4844 Ingo Molnar 2006-07-30 484 * We must not return kernel stack data. ^1da177e4c3f41 Linus Torvalds 2005-04-16 485 * due to padding, it's not enough ^1da177e4c3f41 Linus Torvalds 2005-04-16 486 * to set all member fields. ^1da177e4c3f41 Linus Torvalds 2005-04-16 487 */ ^1da177e4c3f41 Linus Torvalds 2005-04-16 488 err = security_msg_queue_msgctl(NULL, cmd); ^1da177e4c3f41 Linus Torvalds 2005-04-16 489 if (err) ^1da177e4c3f41 Linus Torvalds 2005-04-16 490 return err; ^1da177e4c3f41 Linus Torvalds 2005-04-16 491 156d9ed1260ee5 Al Viro 2017-07-09 492 memset(msginfo, 0, sizeof(*msginfo)); 156d9ed1260ee5 Al Viro 2017-07-09 493 msginfo->msgmni = ns->msg_ctlmni; 156d9ed1260ee5 Al Viro 2017-07-09 494 msginfo->msgmax = ns->msg_ctlmax; 156d9ed1260ee5 Al Viro 2017-07-09 495 msginfo->msgmnb = ns->msg_ctlmnb; 156d9ed1260ee5 Al Viro 2017-07-09 496 msginfo->msgssz = MSGSSZ; 156d9ed1260ee5 Al Viro 2017-07-09 @497 msginfo->msgseg = MSGSEG; d9a605e40b1376 Davidlohr Bueso 2013-09-11 498 down_read(&msg_ids(ns).rwsem); 72d1e611082eda Jiebin Sun 2022-09-14 499 if (cmd == MSG_INFO) 156d9ed1260ee5 Al Viro 2017-07-09 500 msginfo->msgpool = msg_ids(ns).in_use; 72d1e611082eda Jiebin Sun 2022-09-14 501 max_idx = ipc_get_maxidx(&msg_ids(ns)); 72d1e611082eda Jiebin Sun 2022-09-14 502 up_read(&msg_ids(ns).rwsem); 72d1e611082eda Jiebin Sun 2022-09-14 503 if (cmd == MSG_INFO) { 72d1e611082eda Jiebin Sun 2022-09-14 504 msginfo->msgmap = min_t(int, 72d1e611082eda Jiebin Sun 2022-09-14 505 percpu_counter_sum(&ns->percpu_msg_hdrs), 72d1e611082eda Jiebin Sun 2022-09-14 506 INT_MAX); 72d1e611082eda Jiebin Sun 2022-09-14 507 msginfo->msgtql = min_t(int, 72d1e611082eda Jiebin Sun 2022-09-14 508 percpu_counter_sum(&ns->percpu_msg_bytes), 72d1e611082eda Jiebin Sun 2022-09-14 509 INT_MAX); ^1da177e4c3f41 Linus Torvalds 2005-04-16 510 } else { 156d9ed1260ee5 Al Viro 2017-07-09 511 msginfo->msgmap = MSGMAP; 156d9ed1260ee5 Al Viro 2017-07-09 512 msginfo->msgpool = MSGPOOL; 156d9ed1260ee5 Al Viro 2017-07-09 513 msginfo->msgtql = MSGTQL; ^1da177e4c3f41 Linus Torvalds 2005-04-16 514 } 27c331a1746142 Manfred Spraul 2018-08-21 515 return (max_idx < 0) ? 0 : max_idx; ^1da177e4c3f41 Linus Torvalds 2005-04-16 516 } 2cafed30f150f7 Davidlohr Bueso 2013-07-08 517 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
