tree: https://github.com/0day-ci/linux/commits/UPDATE-20200611-034348/Daniel-Ve... head: 8ecab5fe94c5d85789550eda4e5b9ca6d61315b0 commit: 08117a632fade06f3c687d817ba7fc8b9998d524 [4/18] dma-fence: prime lockdep annotations config: um-allmodconfig (attached as .config) compiler: gcc-9 (Debian 9.3.0-13) 9.3.0 reproduce (this is a W=1 build): git checkout 08117a632fade06f3c687d817ba7fc8b9998d524 # save the attached .config to linux build tree make W=1 ARCH=um 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 >>, old ones prefixed by <<): cc1: warning: arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] In file included from include/linux/spinlock_types.h:18, from include/linux/mutex.h:16, from include/linux/ww_mutex.h:20, from include/linux/dma-resv.h:42, from drivers/dma-buf/dma-resv.c:35: drivers/dma-buf/dma-resv.c: In function 'dma_resv_lockdep': 119 | lock_map_acquire(&__mmu_notifier_invalidate_range_start_map); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/lockdep.h:636:61: note: in definition of macro 'lock_acquire_exclusive' 636 | #define lock_acquire_exclusive(l, s, t, n, i) lock_acquire(l, s, t, 0, 1, n, i) | ^ drivers/dma-buf/dma-resv.c:119:2: note: in expansion of macro 'lock_map_acquire' 119 | lock_map_acquire(&__mmu_notifier_invalidate_range_start_map); | ^~~~~~~~~~~~~~~~ drivers/dma-buf/dma-resv.c:119:20: note: each undeclared identifier is reported only once for each function it appears in 119 | lock_map_acquire(&__mmu_notifier_invalidate_range_start_map); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/lockdep.h:636:61: note: in definition of macro 'lock_acquire_exclusive' 636 | #define lock_acquire_exclusive(l, s, t, n, i) lock_acquire(l, s, t, 0, 1, n, i) | ^ drivers/dma-buf/dma-resv.c:119:2: note: in expansion of macro 'lock_map_acquire' 119 | lock_map_acquire(&__mmu_notifier_invalidate_range_start_map); | ^~~~~~~~~~~~~~~~ vim +119 drivers/dma-buf/dma-resv.c 36 #include <linux/export.h> 37 #include <linux/sched/mm.h> 38 #include <linux/mmu_notifier.h> 39 40 /** 41 * DOC: Reservation Object Overview 42 * 43 * The reservation object provides a mechanism to manage shared and 44 * exclusive fences associated with a buffer. A reservation object 45 * can have attached one exclusive fence (normally associated with 46 * write operations) or N shared fences (read operations). The RCU 47 * mechanism is used to protect read access to fences from locked 48 * write-side updates. 49 */ 50 51 DEFINE_WD_CLASS(reservation_ww_class); 52 EXPORT_SYMBOL(reservation_ww_class); 53 54 struct lock_class_key reservation_seqcount_class; 55 EXPORT_SYMBOL(reservation_seqcount_class); 56 57 const char reservation_seqcount_string[] = "reservation_seqcount"; 58 EXPORT_SYMBOL(reservation_seqcount_string); 59 60 /** 61 * dma_resv_list_alloc - allocate fence list 62 * @shared_max: number of fences we need space for 63 * 64 * Allocate a new dma_resv_list and make sure to correctly initialize 65 * shared_max. 66 */ 67 static struct dma_resv_list *dma_resv_list_alloc(unsigned int shared_max) 68 { 69 struct dma_resv_list *list; 70 71 list = kmalloc(offsetof(typeof(*list), shared[shared_max]), GFP_KERNEL); 72 if (!list) 73 return NULL; 74 75 list->shared_max = (ksize(list) - offsetof(typeof(*list), shared)) / 76 sizeof(*list->shared); 77 78 return list; 79 } 80 81 /** 82 * dma_resv_list_free - free fence list 83 * @list: list to free 84 * 85 * Free a dma_resv_list and make sure to drop all references. 86 */ 87 static void dma_resv_list_free(struct dma_resv_list *list) 88 { 89 unsigned int i; 90 91 if (!list) 92 return; 93 94 for (i = 0; i < list->shared_count; ++i) 95 dma_fence_put(rcu_dereference_protected(list->shared[i], true)); 96 97 kfree_rcu(list, rcu); 98 } 99 100 #if IS_ENABLED(CONFIG_LOCKDEP) 101 static int __init dma_resv_lockdep(void) 102 { 103 struct mm_struct *mm = mm_alloc(); 104 struct ww_acquire_ctx ctx; 105 struct dma_resv obj; 106 int ret; 107 108 if (!mm) 109 return -ENOMEM; 110 111 dma_resv_init(&obj); 112 113 down_read(&mm->mmap_sem); 114 ww_acquire_init(&ctx, &reservation_ww_class); 115 ret = dma_resv_lock(&obj, &ctx); 116 if (ret == -EDEADLK) 117 dma_resv_lock_slow(&obj, &ctx); 118 fs_reclaim_acquire(GFP_KERNEL); 120 __dma_fence_might_wait(); 121 lock_map_release(&__mmu_notifier_invalidate_range_start_map); 122 fs_reclaim_release(GFP_KERNEL); 123 ww_mutex_unlock(&obj.lock); 124 ww_acquire_fini(&ctx); 125 up_read(&mm->mmap_sem); 126 127 mmput(mm); 128 129 return 0; 130 } 131 subsys_initcall(dma_resv_lockdep); 132 #endif 133 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org