[openeuler:OLK-5.10 2284/2284] drivers/ub/urma/uburma/uburma_mmap.c:29:6: warning: no previous prototype for 'uburma_umap_priv_init'
tree: https://gitee.com/openeuler/kernel.git OLK-5.10 head: 170b758d064664f953e8f6de41dd4a3ef122443a commit: 5d130e2cfa3d2aaee4d10e18c075f6c3750600c5 [2284/2284] urma: upload kernel patch for 20240511_mig config: arm64-randconfig-003-20241029 (https://download.01.org/0day-ci/archive/20241104/202411040843.b0ebMozw-lkp@i...) compiler: aarch64-linux-gcc (GCC) 14.1.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241104/202411040843.b0ebMozw-lkp@i...)
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@intel.com | Closes: https://lore.kernel.org/oe-kbuild-all/202411040843.b0ebMozw-lkp@intel.com/
All warnings (new ones prefixed by >>):
drivers/ub/urma/uburma/uburma_mmap.c:29:6: warning: no previous prototype for 'uburma_umap_priv_init' [-Wmissing-prototypes]
29 | void uburma_umap_priv_init(struct uburma_umap_priv *priv, | ^~~~~~~~~~~~~~~~~~~~~
drivers/ub/urma/uburma/uburma_mmap.c:42:6: warning: no previous prototype for 'uburma_unmap_vma_pages' [-Wmissing-prototypes]
42 | void uburma_unmap_vma_pages(struct uburma_file *ufile) | ^~~~~~~~~~~~~~~~~~~~~~
drivers/ub/urma/uburma/uburma_mmap.c:157:36: warning: no previous prototype for 'uburma_get_umap_ops' [-Wmissing-prototypes]
157 | const struct vm_operations_struct *uburma_get_umap_ops(void) | ^~~~~~~~~~~~~~~~~~~ --
drivers/ub/urma/ubcore/ubcore_tpg.c:85:6: warning: no previous prototype for 'ubcore_tpg_kref_get' [-Wmissing-prototypes]
85 | void ubcore_tpg_kref_get(struct ubcore_tpg *tpg) | ^~~~~~~~~~~~~~~~~~~ drivers/ub/urma/ubcore/ubcore_tpg.c: In function 'ubcore_find_remove_tpg': drivers/ub/urma/ubcore/ubcore_tpg.c:100:42: warning: the comparison will always evaluate as 'false' for the address of 'head' will never be NULL [-Waddress] 100 | if (&dev->ht[UBCORE_HT_TPG].head == NULL) { | ^~ In file included from drivers/ub/urma/ubcore/ubcore_hash_table.h:24, from drivers/ub/urma/ubcore/ubcore_tpg.c:23: include/urma/ubcore_types.h:178:28: note: 'head' declared here 178 | struct hlist_head *head; | ^~~~ drivers/ub/urma/ubcore/ubcore_tpg.c: In function 'ubcore_find_remove_tp_node': drivers/ub/urma/ubcore/ubcore_tpg.c:131:41: warning: the comparison will always evaluate as 'false' for the address of 'head' will never be NULL [-Waddress] 131 | if (&dev->ht[UBCORE_HT_TP].head == NULL) { | ^~ include/urma/ubcore_types.h:178:28: note: 'head' declared here 178 | struct hlist_head *head; | ^~~~ -- drivers/ub/urma/ubcore/ubcore_netlink.c:192:5: warning: no previous prototype for 'ubcore_genl_unicast' [-Wmissing-prototypes] 192 | int ubcore_genl_unicast(struct ubcore_nlmsg *req, uint32_t len) | ^~~~~~~~~~~~~~~~~~~ drivers/ub/urma/ubcore/ubcore_netlink.c: In function 'ubcore_create_nl_session':
drivers/ub/urma/ubcore/ubcore_netlink.c:89:15: warning: 'strncpy' output may be truncated copying 63 bytes from a string of length 63 [-Wstringop-truncation]
89 | (void)strncpy(s->dev_name, dev->dev_name, UBCORE_MAX_DEV_NAME - 1); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -- drivers/ub/urma/ubcore/ubcore_msg.c:519:28: warning: no previous prototype for 'ubcore_asyn_send_fe2tpf_msg' [-Wmissing-prototypes] 519 | struct ubcore_msg_session *ubcore_asyn_send_fe2tpf_msg(struct ubcore_device *dev, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~ In function 'ubcore_migrate_req', inlined from 'ubcore_recv_req' at drivers/ub/urma/ubcore/ubcore_msg.c:368:16:
drivers/ub/urma/ubcore/ubcore_msg.c:264:15: warning: 'strncpy' output may be truncated copying 63 bytes from a string of length 63 [-Wstringop-truncation]
264 | (void)strncpy(mig_resp->dev_name, dev->dev_name, UBCORE_MAX_DEV_NAME - 1); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -- drivers/ub/urma/ubcore/ubcore_device.c:413:6: warning: no previous prototype for 'ubcore_destroy_upi_list' [-Wmissing-prototypes] 413 | void ubcore_destroy_upi_list(struct ubcore_device *dev) | ^~~~~~~~~~~~~~~~~~~~~~~ drivers/ub/urma/ubcore/ubcore_device.c:1666:5: warning: no previous prototype for 'ubcore_dispatch_event' [-Wmissing-prototypes] 1666 | int ubcore_dispatch_event(struct ubcore_event *event) | ^~~~~~~~~~~~~~~~~~~~~ In file included from include/linux/printk.h:7, from include/linux/kernel.h:17, from include/asm-generic/bug.h:20, from arch/arm64/include/asm/bug.h:26, from include/linux/bug.h:5, from include/linux/refcount.h:96, from include/net/net_namespace.h:9, from drivers/ub/urma/ubcore/ubcore_device.c:21: drivers/ub/urma/ubcore/ubcore_device.c: In function 'ubcore_add_ueid': include/linux/kern_levels.h:5:25: warning: too many arguments for format [-Wformat-extra-args] 5 | #define KERN_SOH "\001" /* ASCII Start Of Header */ | ^~~~~~ include/linux/kern_levels.h:11:25: note: in expansion of macro 'KERN_SOH' 11 | #define KERN_ERR KERN_SOH "3" /* error conditions */ | ^~~~~~~~ include/linux/printk.h:392:16: note: in expansion of macro 'KERN_ERR' 392 | printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__) | ^~~~~~~~ drivers/ub/urma/ubcore/ubcore_log.h:46:16: note: in expansion of macro 'pr_err' 46 | ((void)pr_##l("%s|%s:[%d]|" format, UBCORE_LOG_TAG, __func__, __LINE__, ##args)) | ^~~ drivers/ub/urma/ubcore/ubcore_log.h:57:17: note: in expansion of macro 'ubcore_default_log' 57 | ubcore_default_log(err, __VA_ARGS__); \ | ^~~~~~~~~~~~~~~~~~ drivers/ub/urma/ubcore/ubcore_device.c:1874:17: note: in expansion of macro 'ubcore_log_err' 1874 | ubcore_log_err("failed to add ueid, ret:%d\n", | ^~~~~~~~~~~~~~ drivers/ub/urma/ubcore/ubcore_device.c: In function 'ubcore_delete_ueid': include/linux/kern_levels.h:5:25: warning: too many arguments for format [-Wformat-extra-args] 5 | #define KERN_SOH "\001" /* ASCII Start Of Header */ | ^~~~~~ include/linux/kern_levels.h:11:25: note: in expansion of macro 'KERN_SOH' 11 | #define KERN_ERR KERN_SOH "3" /* error conditions */ | ^~~~~~~~ include/linux/printk.h:392:16: note: in expansion of macro 'KERN_ERR' 392 | printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__) | ^~~~~~~~ drivers/ub/urma/ubcore/ubcore_log.h:46:16: note: in expansion of macro 'pr_err' 46 | ((void)pr_##l("%s|%s:[%d]|" format, UBCORE_LOG_TAG, __func__, __LINE__, ##args)) | ^~~ drivers/ub/urma/ubcore/ubcore_log.h:57:17: note: in expansion of macro 'ubcore_default_log' 57 | ubcore_default_log(err, __VA_ARGS__); \ | ^~~~~~~~~~~~~~~~~~ drivers/ub/urma/ubcore/ubcore_device.c:1896:17: note: in expansion of macro 'ubcore_log_err' 1896 | ubcore_log_err("failed to add ueid, ret:%d\n", | ^~~~~~~~~~~~~~ drivers/ub/urma/ubcore/ubcore_device.c: At top level: drivers/ub/urma/ubcore/ubcore_device.c:2372:6: warning: no previous prototype for 'ubcore_net_exit' [-Wmissing-prototypes] 2372 | void ubcore_net_exit(struct net *net) | ^~~~~~~~~~~~~~~ In function 'ubcore_send_remove_tpf_dev_info', inlined from 'uninit_ubcore_device' at drivers/ub/urma/ubcore/ubcore_device.c:1057:37:
drivers/ub/urma/ubcore/ubcore_device.c:823:15: warning: 'strncpy' output may be truncated copying 63 bytes from a string of length 63 [-Wstringop-truncation]
823 | (void)strncpy(data->dev_name, dev->dev_name, UBCORE_MAX_DEV_NAME - 1); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/ub/urma/ubcore/ubcore_device.c: In function 'ubcore_new_tpf_dev_msg': drivers/ub/urma/ubcore/ubcore_device.c:888:15: warning: 'strncpy' output may be truncated copying 63 bytes from a string of length 63 [-Wstringop-truncation] 888 | (void)strncpy(data->dev_name, dev->dev_name, UBCORE_MAX_DEV_NAME - 1); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/ub/urma/ubcore/ubcore_device.c:892:17: warning: 'strnlen' specified bound 64 exceeds source size 16 [-Wstringop-overread] 892 | strnlen(dev->netdev->name, UBCORE_MAX_DEV_NAME) < UBCORE_MAX_DEV_NAME) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from drivers/ub/urma/ubcore/ubcore_device.c:32: include/linux/netdevice.h:1957:33: note: source object allocated here 1957 | char name[IFNAMSIZ]; | ^~~~ -- drivers/ub/urma/ubcore/ubcore_tp.c:70:17: warning: no previous prototype for 'ubcore_get_mtu' [-Wmissing-prototypes] 70 | enum ubcore_mtu ubcore_get_mtu(int mtu) | ^~~~~~~~~~~~~~ drivers/ub/urma/ubcore/ubcore_tp.c:341:5: warning: no previous prototype for 'ubcore_modify_tp_state' [-Wmissing-prototypes] 341 | int ubcore_modify_tp_state(struct ubcore_device *dev, struct ubcore_tp *tp, | ^~~~~~~~~~~~~~~~~~~~~~ drivers/ub/urma/ubcore/ubcore_tp.c: In function 'ubcore_init_create_tp_req':
drivers/ub/urma/ubcore/ubcore_tp.c:581:15: warning: 'strncpy' output may be truncated copying 63 bytes from a string of length 63 [-Wstringop-truncation]
581 | (void)strncpy(data->dev_name, dev->dev_name, UBCORE_MAX_DEV_NAME - 1); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/ub/urma/ubcore/ubcore_tp.c: In function 'ubcore_send_del_tp_req.isra': drivers/ub/urma/ubcore/ubcore_tp.c:687:15: warning: 'strncpy' output may be truncated copying 63 bytes from a string of length 63 [-Wstringop-truncation] 687 | (void)strncpy(data->dev_name, dev->dev_name, UBCORE_MAX_DEV_NAME - 1); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -- drivers/ub/urma/ubcore/ubcore_umem.c:242:21: warning: no previous prototype for 'ubcore_umem_get' [-Wmissing-prototypes] 242 | struct ubcore_umem *ubcore_umem_get(struct ubcore_device *dev, uint64_t va, | ^~~~~~~~~~~~~~~ drivers/ub/urma/ubcore/ubcore_umem.c:260:6: warning: no previous prototype for 'ubcore_umem_release' [-Wmissing-prototypes] 260 | void ubcore_umem_release(struct ubcore_umem *umem) | ^~~~~~~~~~~~~~~~~~~
drivers/ub/urma/ubcore/ubcore_umem.c:284:10: warning: no previous prototype for 'ubcore_umem_find_best_page_size' [-Wmissing-prototypes]
284 | uint64_t ubcore_umem_find_best_page_size(struct ubcore_umem *umem, uint64_t page_size_bitmap, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -- drivers/ub/urma/ubcore/ubcore_netdev.c:41:25: warning: no previous prototype for 'ubcore_lookup_sip_info_without_lock' [-Wmissing-prototypes] 41 | struct ubcore_sip_info *ubcore_lookup_sip_info_without_lock( | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/ub/urma/ubcore/ubcore_netdev.c:75:5: warning: no previous prototype for 'ubcore_notify_uvs_del_sip' [-Wmissing-prototypes] 75 | int ubcore_notify_uvs_del_sip(struct ubcore_device *dev, | ^~~~~~~~~~~~~~~~~~~~~~~~~ drivers/ub/urma/ubcore/ubcore_netdev.c:113:22: warning: no previous prototype for 'ubcore_new_sip_req_msg' [-Wmissing-prototypes] 113 | struct ubcore_nlmsg *ubcore_new_sip_req_msg(struct ubcore_device *dev, | ^~~~~~~~~~~~~~~~~~~~~~ drivers/ub/urma/ubcore/ubcore_netdev.c:145:5: warning: no previous prototype for 'ubcore_notify_uvs_add_sip' [-Wmissing-prototypes] 145 | int ubcore_notify_uvs_add_sip(struct ubcore_device *dev, | ^~~~~~~~~~~~~~~~~~~~~~~~~ drivers/ub/urma/ubcore/ubcore_netdev.c:177:5: warning: no previous prototype for 'ubcore_check_port_state' [-Wmissing-prototypes] 177 | int ubcore_check_port_state(struct ubcore_device *dev) | ^~~~~~~~~~~~~~~~~~~~~~~
drivers/ub/urma/ubcore/ubcore_netdev.c:204:6: warning: no previous prototype for 'ubcore_fill_port_netdev' [-Wmissing-prototypes]
204 | void ubcore_fill_port_netdev(struct ubcore_device *dev, | ^~~~~~~~~~~~~~~~~~~~~~~ drivers/ub/urma/ubcore/ubcore_netdev.c:268:5: warning: no previous prototype for 'ubcore_set_port_netdev' [-Wmissing-prototypes] 268 | int ubcore_set_port_netdev(struct ubcore_device *dev, struct net_device *ndev, | ^~~~~~~~~~~~~~~~~~~~~~ drivers/ub/urma/ubcore/ubcore_netdev.c:353:5: warning: no previous prototype for 'ubcore_unset_port_netdev' [-Wmissing-prototypes] 353 | int ubcore_unset_port_netdev(struct ubcore_device *dev, struct net_device *ndev, | ^~~~~~~~~~~~~~~~~~~~~~~~ drivers/ub/urma/ubcore/ubcore_netdev.c:385:6: warning: no previous prototype for 'ubcore_put_port_netdev' [-Wmissing-prototypes] 385 | void ubcore_put_port_netdev(struct ubcore_device *dev) | ^~~~~~~~~~~~~~~~~~~~~~ drivers/ub/urma/ubcore/ubcore_netdev.c:412:5: warning: no previous prototype for 'ubcore_sip_table_init' [-Wmissing-prototypes] 412 | int ubcore_sip_table_init(struct ubcore_sip_table *sip_table, uint32_t size) | ^~~~~~~~~~~~~~~~~~~~~ drivers/ub/urma/ubcore/ubcore_netdev.c:431:6: warning: no previous prototype for 'ubcore_sip_table_uninit' [-Wmissing-prototypes] 431 | void ubcore_sip_table_uninit(struct ubcore_sip_table *sip_table) | ^~~~~~~~~~~~~~~~~~~~~~~ drivers/ub/urma/ubcore/ubcore_netdev.c:442:5: warning: no previous prototype for 'ubcore_sip_idx_alloc' [-Wmissing-prototypes] 442 | int ubcore_sip_idx_alloc(struct ubcore_sip_table *sip_table) | ^~~~~~~~~~~~~~~~~~~~ drivers/ub/urma/ubcore/ubcore_netdev.c:458:5: warning: no previous prototype for 'ubcore_sip_idx_free' [-Wmissing-prototypes] 458 | int ubcore_sip_idx_free(struct ubcore_sip_table *sip_table, uint32_t idx) | ^~~~~~~~~~~~~~~~~~~ drivers/ub/urma/ubcore/ubcore_netdev.c:471:5: warning: no previous prototype for 'ubcore_add_sip_entry' [-Wmissing-prototypes] 471 | int ubcore_add_sip_entry(struct ubcore_sip_table *sip_table, const struct ubcore_sip_info *sip, | ^~~~~~~~~~~~~~~~~~~~ drivers/ub/urma/ubcore/ubcore_netdev.c:489:5: warning: no previous prototype for 'ubcore_del_sip_entry' [-Wmissing-prototypes] 489 | int ubcore_del_sip_entry(struct ubcore_sip_table *sip_table, uint32_t idx) | ^~~~~~~~~~~~~~~~~~~~
drivers/ub/urma/ubcore/ubcore_netdev.c:519:5: warning: no previous prototype for 'ubcore_update_sip_entry' [-Wmissing-prototypes]
519 | int ubcore_update_sip_entry(struct ubcore_sip_table *sip_table, struct ubcore_sip_info *new_sip, | ^~~~~~~~~~~~~~~~~~~~~~~ drivers/ub/urma/ubcore/ubcore_netdev.c:548:5: warning: no previous prototype for 'ubcore_lookup_sip_idx' [-Wmissing-prototypes] 548 | int ubcore_lookup_sip_idx(struct ubcore_sip_table *sip_table, struct ubcore_sip_info *sip, | ^~~~~~~~~~~~~~~~~~~~~ drivers/ub/urma/ubcore/ubcore_netdev.c: In function 'ubcore_set_port_netdev': drivers/ub/urma/ubcore/ubcore_netdev.c:275:17: warning: 'strnlen' specified bound 64 exceeds source size 21 [-Wstringop-overread] 275 | strnlen(netdev_name(ndev), UBCORE_MAX_DEV_NAME) >= UBCORE_MAX_DEV_NAME) { | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/ub/urma/ubcore/ubcore_netdev.c: In function 'ubcore_unset_port_netdev': drivers/ub/urma/ubcore/ubcore_netdev.c:360:17: warning: 'strnlen' specified bound 64 exceeds source size 21 [-Wstringop-overread] 360 | strnlen(netdev_name(ndev), UBCORE_MAX_DEV_NAME) >= UBCORE_MAX_DEV_NAME) { | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -- drivers/ub/urma/ubcore/ubcore_vtp.c:337:6: warning: no previous prototype for 'ubcore_hash_table_rmv_vtpn' [-Wmissing-prototypes] 337 | void ubcore_hash_table_rmv_vtpn(struct ubcore_device *dev, struct ubcore_vtpn *vtpn, | ^~~~~~~~~~~~~~~~~~~~~~~~~~ In function 'ubcore_send_create_vtp_req', inlined from 'ubcore_connect_vtp' at drivers/ub/urma/ubcore/ubcore_vtp.c:419:8:
drivers/ub/urma/ubcore/ubcore_vtp.c:93:15: warning: 'strncpy' output may be truncated copying 63 bytes from a string of length 63 [-Wstringop-truncation]
93 | (void)strncpy(create->dev_name, dev->dev_name, UBCORE_MAX_DEV_NAME - 1); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
vim +/uburma_umap_priv_init +29 drivers/ub/urma/uburma/uburma_mmap.c
28
29 void uburma_umap_priv_init(struct uburma_umap_priv *priv,
30 struct vm_area_struct *vma) 31 { 32 struct uburma_file *ufile = vma->vm_file->private_data; 33 34 priv->vma = vma; 35 vma->vm_private_data = priv; 36 37 mutex_lock(&ufile->umap_mutex); 38 list_add(&priv->node, &ufile->umaps_list); 39 mutex_unlock(&ufile->umap_mutex); 40 } 41
42 void uburma_unmap_vma_pages(struct uburma_file *ufile)
43 { 44 struct uburma_umap_priv *priv, *next_priv; 45 struct mm_struct *mm = NULL; 46 struct vm_area_struct *vma; 47 int ret; 48 49 lockdep_assert_held(&ufile->cleanup_rwsem); 50 51 while (1) { 52 mutex_lock(&ufile->umap_mutex); 53 list_for_each_entry_safe(priv, next_priv, &ufile->umaps_list, node) { 54 mm = priv->vma->vm_mm; 55 ret = mmget_not_zero(mm); 56 if (ret != 0) { 57 list_del_init(&priv->node); 58 mm = NULL; 59 continue; 60 } 61 break; 62 } 63 mutex_unlock(&ufile->umap_mutex); 64 if (!mm) 65 return; 66 67 mmap_read_lock(mm); 68 mutex_lock(&ufile->umap_mutex); 69 list_for_each_entry_safe(priv, next_priv, &ufile->umaps_list, node) { 70 vma = priv->vma; 71 if (vma->vm_mm != mm) 72 continue; 73 list_del_init(&priv->node); 74 zap_vma_ptes(vma, vma->vm_start, vma->vm_end - vma->vm_start); 75 } 76 mutex_unlock(&ufile->umap_mutex); 77 mmap_read_unlock(mm); 78 mmput(mm); 79 } 80 } 81 82 static void uburma_umap_open(struct vm_area_struct *vma) 83 { 84 struct uburma_file *ufile = vma->vm_file->private_data; 85 struct uburma_umap_priv *priv; 86 87 if (!down_read_trylock(&ufile->cleanup_rwsem)) 88 goto out_zap; 89 90 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 91 if (!priv) 92 goto out_unlock; 93 94 uburma_umap_priv_init(priv, vma); 95 96 up_read(&ufile->cleanup_rwsem); 97 return; 98 99 out_unlock: 100 up_read(&ufile->cleanup_rwsem); 101 out_zap: 102 vma->vm_private_data = NULL; 103 zap_vma_ptes(vma, vma->vm_start, vma->vm_end - vma->vm_start); 104 } 105 106 static void uburma_umap_close(struct vm_area_struct *vma) 107 { 108 struct uburma_file *ufile = vma->vm_file->private_data; 109 struct uburma_umap_priv *priv = vma->vm_private_data; 110 111 if (!priv) 112 return; 113 114 mutex_lock(&ufile->umap_mutex); 115 list_del(&priv->node); 116 mutex_unlock(&ufile->umap_mutex); 117 kfree(priv); 118 vma->vm_private_data = NULL; 119 } 120 121 static vm_fault_t uburma_umap_fault(struct vm_fault *vmf) 122 { 123 struct uburma_file *ufile = vmf->vma->vm_file->private_data; 124 struct uburma_umap_priv *priv = vmf->vma->vm_private_data; 125 vm_fault_t ret = 0; 126 127 if (!priv) 128 return VM_FAULT_SIGBUS; 129 130 if (!(vmf->vma->vm_flags & (VM_WRITE | VM_MAYWRITE))) { 131 vmf->page = ZERO_PAGE(0); 132 get_page(vmf->page); 133 return 0; 134 } 135 136 mutex_lock(&ufile->umap_mutex); 137 if (!ufile->fault_page) 138 ufile->fault_page = alloc_pages(vmf->gfp_mask | __GFP_ZERO, 0); 139 140 if (ufile->fault_page) { 141 vmf->page = ufile->fault_page; 142 get_page(vmf->page); 143 } else { 144 ret = VM_FAULT_SIGBUS; 145 } 146 mutex_unlock(&ufile->umap_mutex); 147 148 return ret; 149 } 150 151 static const struct vm_operations_struct g_urma_umap_ops = { 152 .open = uburma_umap_open, 153 .close = uburma_umap_close, 154 .fault = uburma_umap_fault, 155 }; 156
157 const struct vm_operations_struct *uburma_get_umap_ops(void)
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kernel test robot