tree: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git tmp.tmp2 head: adcceb5eb7aee38e4a9c15bdf599655f0e1b1324 commit: 7fa6225737e4d872b612659345f0ece8922ba765 [260/364] sched/headers, kobject: Use <linux/sysfs_types.h> in <linux/kobject.h> config: x86_64-kexec (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=7f... git remote add tip https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git git fetch --no-tags tip tmp.tmp2 git checkout 7fa6225737e4d872b612659345f0ece8922ba765 # save the attached .config to linux build tree make W=1 ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): In file included from include/linux/workqueue.h:16, from include/linux/srcu_types.h:20, from include/linux/srcu.h:19, from include/linux/notifier.h:16, from arch/x86/include/asm/uprobes.h:13, from include/linux/uprobes.h:49, from include/linux/mm_types.h:14, from include/linux/mmzone.h:21, from include/linux/gfp.h:7, from include/linux/umh.h:4, from include/linux/kmod.h:9, from include/linux/module.h:15, from drivers/scsi/sg.c:24: include/linux/rcuwait.h: In function 'rcuwait_active': include/linux/rcupdate.h:364:9: error: dereferencing pointer to incomplete type 'struct task_struct' 364 | typeof(*p) *_________p1 = (typeof(*p) *__force)READ_ONCE(p); \ | ^ include/linux/rcupdate.h:474:31: note: in expansion of macro '__rcu_access_pointer' 474 | #define rcu_access_pointer(p) __rcu_access_pointer((p), __rcu) | ^~~~~~~~~~~~~~~~~~~~ include/linux/rcuwait.h:33:11: note: in expansion of macro 'rcu_access_pointer' 33 | return !!rcu_access_pointer(w->task); | ^~~~~~~~~~~~~~~~~~ drivers/scsi/sg.c: In function 'sg_add_device': 1567 | error = sysfs_create_link(&scsidp->sdev_gendev.kobj, | ^~~~~~~~~~~~~~~~~ | kernfs_create_link drivers/scsi/sg.c: In function 'sg_remove_device': 1644 | sysfs_remove_link(&scsidp->sdev_gendev.kobj, "generic"); | ^~~~~~~~~~~~~~~~~ In file included from include/linux/uaccess.h:11, from include/linux/sched/task.h:11, from include/linux/sched/signal.h:12, from drivers/scsi/sg.c:28: drivers/scsi/sg.c: At top level: arch/x86/include/asm/uaccess.h:46:20: warning: 'pagefault_disabled' used but never defined 46 | static inline bool pagefault_disabled(void); | ^~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors -- In file included from include/linux/rculist.h:11, from include/linux/dcache.h:8, from include/linux/fs.h:10, from include/linux/backing-dev.h:13, from drivers/nvme/host/multipath.c:6: include/linux/rcuwait.h: In function 'rcuwait_active': include/linux/rcupdate.h:364:9: error: dereferencing pointer to incomplete type 'struct task_struct' 364 | typeof(*p) *_________p1 = (typeof(*p) *__force)READ_ONCE(p); \ | ^ include/linux/rcupdate.h:474:31: note: in expansion of macro '__rcu_access_pointer' 474 | #define rcu_access_pointer(p) __rcu_access_pointer((p), __rcu) | ^~~~~~~~~~~~~~~~~~~~ include/linux/rcuwait.h:33:11: note: in expansion of macro 'rcu_access_pointer' 33 | return !!rcu_access_pointer(w->task); | ^~~~~~~~~~~~~~~~~~ drivers/nvme/host/multipath.c: In function 'nvme_subsys_iopolicy_show': 675 | return sysfs_emit(buf, "%s\n", | ^~~~~~~~~~ In file included from include/linux/uaccess.h:11, from arch/x86/include/asm/fpu/xstate.h:5, from arch/x86/include/asm/pgtable.h:26, from include/linux/pgtable.h:6, from include/linux/mm.h:35, from include/linux/bvec.h:14, from include/linux/blk_types.h:10, from include/linux/genhd.h:19, from include/linux/blkdev.h:6, from include/linux/backing-dev.h:15, from drivers/nvme/host/multipath.c:6: drivers/nvme/host/multipath.c: At top level: arch/x86/include/asm/uaccess.h:46:20: warning: 'pagefault_disabled' used but never defined 46 | static inline bool pagefault_disabled(void); | ^~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors -- In file included from include/linux/radix-tree.h:16, from include/linux/idr.h:15, from include/linux/kernfs.h:13, from include/linux/kobject.h:20, from include/linux/of.h:18, from include/linux/irqdomain.h:35, from include/linux/acpi.h:13, from drivers/nvme/host/pci.c:7: include/linux/rcuwait.h: In function 'rcuwait_active': include/linux/rcupdate.h:364:9: error: dereferencing pointer to incomplete type 'struct task_struct' 364 | typeof(*p) *_________p1 = (typeof(*p) *__force)READ_ONCE(p); \ | ^ include/linux/rcupdate.h:474:31: note: in expansion of macro '__rcu_access_pointer' 474 | #define rcu_access_pointer(p) __rcu_access_pointer((p), __rcu) | ^~~~~~~~~~~~~~~~~~~~ include/linux/rcuwait.h:33:11: note: in expansion of macro 'rcu_access_pointer' 33 | return !!rcu_access_pointer(w->task); | ^~~~~~~~~~~~~~~~~~ drivers/nvme/host/pci.c: In function 'nvme_map_cmb': 1872 | if (sysfs_add_file_to_group(&dev->ctrl.device->kobj, | ^~~~~~~~~~~~~~~~~~~~~~~ drivers/nvme/host/pci.c: In function 'nvme_release_cmb': 1881 | sysfs_remove_file_from_group(&dev->ctrl.device->kobj, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from include/linux/uaccess.h:11, from arch/x86/include/asm/fpu/xstate.h:5, from arch/x86/include/asm/pgtable.h:26, from include/linux/pgtable.h:6, from include/linux/mm.h:35, from include/linux/bvec.h:14, from include/linux/blk_types.h:10, from include/linux/genhd.h:19, from include/linux/blkdev.h:6, from drivers/nvme/host/pci.c:10: drivers/nvme/host/pci.c: At top level: arch/x86/include/asm/uaccess.h:46:20: warning: 'pagefault_disabled' used but never defined 46 | static inline bool pagefault_disabled(void); | ^~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +1567 drivers/scsi/sg.c ^1da177e4c3f41 Linus Torvalds 2005-04-16 1516 ^1da177e4c3f41 Linus Torvalds 2005-04-16 1517 static int cc833acbee9db5 Douglas Gilbert 2014-06-25 1518 sg_add_device(struct device *cl_dev, struct class_interface *cl_intf) ^1da177e4c3f41 Linus Torvalds 2005-04-16 1519 { ee959b00c335d7 Tony Jones 2008-02-22 1520 struct scsi_device *scsidp = to_scsi_device(cl_dev->parent); ^1da177e4c3f41 Linus Torvalds 2005-04-16 1521 struct gendisk *disk; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1522 Sg_device *sdp = NULL; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1523 struct cdev * cdev = NULL; 7c07d613d22680 James Bottomley 2007-08-05 1524 int error; 454e8957eb6084 Ishai Rabinovitz 2006-06-29 1525 unsigned long iflags; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1526 ^1da177e4c3f41 Linus Torvalds 2005-04-16 1527 disk = alloc_disk(1); ^1da177e4c3f41 Linus Torvalds 2005-04-16 1528 if (!disk) { cc833acbee9db5 Douglas Gilbert 2014-06-25 1529 pr_warn("%s: alloc_disk failed\n", __func__); ^1da177e4c3f41 Linus Torvalds 2005-04-16 1530 return -ENOMEM; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1531 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 1532 disk->major = SCSI_GENERIC_MAJOR; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1533 ^1da177e4c3f41 Linus Torvalds 2005-04-16 1534 error = -ENOMEM; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1535 cdev = cdev_alloc(); ^1da177e4c3f41 Linus Torvalds 2005-04-16 1536 if (!cdev) { cc833acbee9db5 Douglas Gilbert 2014-06-25 1537 pr_warn("%s: cdev_alloc failed\n", __func__); ^1da177e4c3f41 Linus Torvalds 2005-04-16 1538 goto out; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1539 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 1540 cdev->owner = THIS_MODULE; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1541 cdev->ops = &sg_fops; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1542 7c07d613d22680 James Bottomley 2007-08-05 1543 sdp = sg_alloc(disk, scsidp); 7c07d613d22680 James Bottomley 2007-08-05 1544 if (IS_ERR(sdp)) { cc833acbee9db5 Douglas Gilbert 2014-06-25 1545 pr_warn("%s: sg_alloc failed\n", __func__); 7c07d613d22680 James Bottomley 2007-08-05 1546 error = PTR_ERR(sdp); ^1da177e4c3f41 Linus Torvalds 2005-04-16 1547 goto out; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1548 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 1549 7c07d613d22680 James Bottomley 2007-08-05 1550 error = cdev_add(cdev, MKDEV(SCSI_GENERIC_MAJOR, sdp->index), 1); 5e3c34c1e988a0 Greg Kroah-Hartman 2006-01-18 1551 if (error) 454e8957eb6084 Ishai Rabinovitz 2006-06-29 1552 goto cdev_add_err; 5e3c34c1e988a0 Greg Kroah-Hartman 2006-01-18 1553 ^1da177e4c3f41 Linus Torvalds 2005-04-16 1554 sdp->cdev = cdev; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1555 if (sg_sysfs_valid) { ee959b00c335d7 Tony Jones 2008-02-22 1556 struct device *sg_class_member; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1557 d73a1a674b5383 Greg Kroah-Hartman 2008-07-21 1558 sg_class_member = device_create(sg_sysfs_class, cl_dev->parent, ee959b00c335d7 Tony Jones 2008-02-22 1559 MKDEV(SCSI_GENERIC_MAJOR, ee959b00c335d7 Tony Jones 2008-02-22 1560 sdp->index), d73a1a674b5383 Greg Kroah-Hartman 2008-07-21 1561 sdp, "%s", disk->disk_name); d07e03610ca1f4 FUJITA Tomonori 2008-01-15 1562 if (IS_ERR(sg_class_member)) { cc833acbee9db5 Douglas Gilbert 2014-06-25 1563 pr_err("%s: device_create failed\n", __func__); d07e03610ca1f4 FUJITA Tomonori 2008-01-15 1564 error = PTR_ERR(sg_class_member); d07e03610ca1f4 FUJITA Tomonori 2008-01-15 1565 goto cdev_add_err; d07e03610ca1f4 FUJITA Tomonori 2008-01-15 1566 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 @1567 error = sysfs_create_link(&scsidp->sdev_gendev.kobj, ^1da177e4c3f41 Linus Torvalds 2005-04-16 1568 &sg_class_member->kobj, "generic"); ^1da177e4c3f41 Linus Torvalds 2005-04-16 1569 if (error) cc833acbee9db5 Douglas Gilbert 2014-06-25 1570 pr_err("%s: unable to make symlink 'generic' back " cc833acbee9db5 Douglas Gilbert 2014-06-25 1571 "to sg%d\n", __func__, sdp->index); ^1da177e4c3f41 Linus Torvalds 2005-04-16 1572 } else cc833acbee9db5 Douglas Gilbert 2014-06-25 1573 pr_warn("%s: sg_sys Invalid\n", __func__); ^1da177e4c3f41 Linus Torvalds 2005-04-16 1574 cc833acbee9db5 Douglas Gilbert 2014-06-25 1575 sdev_printk(KERN_NOTICE, scsidp, "Attached scsi generic sg%d " cc833acbee9db5 Douglas Gilbert 2014-06-25 1576 "type %d\n", sdp->index, scsidp->type); ^1da177e4c3f41 Linus Torvalds 2005-04-16 1577 ee959b00c335d7 Tony Jones 2008-02-22 1578 dev_set_drvdata(cl_dev, sdp); a24484f281dda1 FUJITA Tomonori 2008-01-15 1579 ^1da177e4c3f41 Linus Torvalds 2005-04-16 1580 return 0; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1581 454e8957eb6084 Ishai Rabinovitz 2006-06-29 1582 cdev_add_err: 7c07d613d22680 James Bottomley 2007-08-05 1583 write_lock_irqsave(&sg_index_lock, iflags); 7c07d613d22680 James Bottomley 2007-08-05 1584 idr_remove(&sg_index_idr, sdp->index); 7c07d613d22680 James Bottomley 2007-08-05 1585 write_unlock_irqrestore(&sg_index_lock, iflags); 7c07d613d22680 James Bottomley 2007-08-05 1586 kfree(sdp); 454e8957eb6084 Ishai Rabinovitz 2006-06-29 1587 ^1da177e4c3f41 Linus Torvalds 2005-04-16 1588 out: ^1da177e4c3f41 Linus Torvalds 2005-04-16 1589 put_disk(disk); ^1da177e4c3f41 Linus Torvalds 2005-04-16 1590 if (cdev) ^1da177e4c3f41 Linus Torvalds 2005-04-16 1591 cdev_del(cdev); ^1da177e4c3f41 Linus Torvalds 2005-04-16 1592 return error; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1593 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 1594 cc833acbee9db5 Douglas Gilbert 2014-06-25 1595 static void cc833acbee9db5 Douglas Gilbert 2014-06-25 1596 sg_device_destroy(struct kref *kref) c6517b7942fad6 Tony Battersby 2009-01-21 1597 { c6517b7942fad6 Tony Battersby 2009-01-21 1598 struct sg_device *sdp = container_of(kref, struct sg_device, d_ref); c6517b7942fad6 Tony Battersby 2009-01-21 1599 unsigned long flags; c6517b7942fad6 Tony Battersby 2009-01-21 1600 c6517b7942fad6 Tony Battersby 2009-01-21 1601 /* CAUTION! Note that the device can still be found via idr_find() c6517b7942fad6 Tony Battersby 2009-01-21 1602 * even though the refcount is 0. Therefore, do idr_remove() BEFORE c6517b7942fad6 Tony Battersby 2009-01-21 1603 * any other cleanup. c6517b7942fad6 Tony Battersby 2009-01-21 1604 */ c6517b7942fad6 Tony Battersby 2009-01-21 1605 c6517b7942fad6 Tony Battersby 2009-01-21 1606 write_lock_irqsave(&sg_index_lock, flags); c6517b7942fad6 Tony Battersby 2009-01-21 1607 idr_remove(&sg_index_idr, sdp->index); c6517b7942fad6 Tony Battersby 2009-01-21 1608 write_unlock_irqrestore(&sg_index_lock, flags); c6517b7942fad6 Tony Battersby 2009-01-21 1609 c6517b7942fad6 Tony Battersby 2009-01-21 1610 SCSI_LOG_TIMEOUT(3, 95e159d6dd808b Hannes Reinecke 2014-06-25 1611 sg_printk(KERN_INFO, sdp, "sg_device_destroy\n")); c6517b7942fad6 Tony Battersby 2009-01-21 1612 c6517b7942fad6 Tony Battersby 2009-01-21 1613 put_disk(sdp->disk); c6517b7942fad6 Tony Battersby 2009-01-21 1614 kfree(sdp); c6517b7942fad6 Tony Battersby 2009-01-21 1615 } c6517b7942fad6 Tony Battersby 2009-01-21 1616 cc833acbee9db5 Douglas Gilbert 2014-06-25 1617 static void cc833acbee9db5 Douglas Gilbert 2014-06-25 1618 sg_remove_device(struct device *cl_dev, struct class_interface *cl_intf) ^1da177e4c3f41 Linus Torvalds 2005-04-16 1619 { ee959b00c335d7 Tony Jones 2008-02-22 1620 struct scsi_device *scsidp = to_scsi_device(cl_dev->parent); ee959b00c335d7 Tony Jones 2008-02-22 1621 Sg_device *sdp = dev_get_drvdata(cl_dev); ^1da177e4c3f41 Linus Torvalds 2005-04-16 1622 unsigned long iflags; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1623 Sg_fd *sfp; cc833acbee9db5 Douglas Gilbert 2014-06-25 1624 int val; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1625 cc833acbee9db5 Douglas Gilbert 2014-06-25 1626 if (!sdp) ^1da177e4c3f41 Linus Torvalds 2005-04-16 1627 return; cc833acbee9db5 Douglas Gilbert 2014-06-25 1628 /* want sdp->detaching non-zero as soon as possible */ cc833acbee9db5 Douglas Gilbert 2014-06-25 1629 val = atomic_inc_return(&sdp->detaching); cc833acbee9db5 Douglas Gilbert 2014-06-25 1630 if (val > 1) cc833acbee9db5 Douglas Gilbert 2014-06-25 1631 return; /* only want to do following once per device */ 7c07d613d22680 James Bottomley 2007-08-05 1632 95e159d6dd808b Hannes Reinecke 2014-06-25 1633 SCSI_LOG_TIMEOUT(3, sg_printk(KERN_INFO, sdp, 95e159d6dd808b Hannes Reinecke 2014-06-25 1634 "%s\n", __func__)); c6517b7942fad6 Tony Battersby 2009-01-21 1635 cc833acbee9db5 Douglas Gilbert 2014-06-25 1636 read_lock_irqsave(&sdp->sfd_lock, iflags); 3442f802a8169a FUJITA Tomonori 2009-02-16 1637 list_for_each_entry(sfp, &sdp->sfds, sfd_siblings) { cc833acbee9db5 Douglas Gilbert 2014-06-25 1638 wake_up_interruptible_all(&sfp->read_wait); c6517b7942fad6 Tony Battersby 2009-01-21 1639 kill_fasync(&sfp->async_qp, SIGPOLL, POLL_HUP); ^1da177e4c3f41 Linus Torvalds 2005-04-16 1640 } cc833acbee9db5 Douglas Gilbert 2014-06-25 1641 wake_up_interruptible_all(&sdp->open_wait); cc833acbee9db5 Douglas Gilbert 2014-06-25 1642 read_unlock_irqrestore(&sdp->sfd_lock, iflags); ^1da177e4c3f41 Linus Torvalds 2005-04-16 1643 ^1da177e4c3f41 Linus Torvalds 2005-04-16 @1644 sysfs_remove_link(&scsidp->sdev_gendev.kobj, "generic"); ee959b00c335d7 Tony Jones 2008-02-22 1645 device_destroy(sg_sysfs_class, MKDEV(SCSI_GENERIC_MAJOR, sdp->index)); ^1da177e4c3f41 Linus Torvalds 2005-04-16 1646 cdev_del(sdp->cdev); ^1da177e4c3f41 Linus Torvalds 2005-04-16 1647 sdp->cdev = NULL; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1648 cc833acbee9db5 Douglas Gilbert 2014-06-25 1649 kref_put(&sdp->d_ref, sg_device_destroy); ^1da177e4c3f41 Linus Torvalds 2005-04-16 1650 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 1651 :::::: The code at line 1567 was first introduced by commit :::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2 :::::: TO: Linus Torvalds <torvalds(a)ppc970.osdl.org&gt; :::::: CC: Linus Torvalds <torvalds(a)ppc970.osdl.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org