From patchwork Fri Aug 4 15:05:28 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 13341992 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id ACAC7C001DB for ; Fri, 4 Aug 2023 15:05:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229798AbjHDPFr (ORCPT ); Fri, 4 Aug 2023 11:05:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45566 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230061AbjHDPFo (ORCPT ); Fri, 4 Aug 2023 11:05:44 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 07D3C49F3; Fri, 4 Aug 2023 08:05:38 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 8ACAB6204A; Fri, 4 Aug 2023 15:05:37 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 652D7C433C8; Fri, 4 Aug 2023 15:05:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1691161536; bh=Lp1Qs8ByJyHcY/oWm72FarFhOl0WVjDkRb6QN+qdPJw=; h=From:To:Cc:Subject:Date:From; b=NC1C5biGN8hoo97HzphtL2XhwO7z3+bwPOD02ABMGlZDqL+tR71B0YxVP9KNNwX1Y SgVOMOj/Gi7k86u8OWy6ladNUVfHGAuOMtESe4pkAfeG4L96Y8a844ot0sQbfI+2Me 0WiePtGhwSVjkxS+usxTK88JMge9jQD0LgDjOL44= From: Greg Kroah-Hartman To: linux-rdma@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Ivan Orlov , Jason Gunthorpe , Leon Romanovsky , Dennis Dalessandro , "Md. Haris Iqbal" , Jack Wang , Greg Kroah-Hartman , Yishai Hadas , Benjamin Tissoires Subject: [PATCH] infiniband: make all 'class' structures const Date: Fri, 4 Aug 2023 17:05:28 +0200 Message-ID: <2023080427-commuting-crewless-cbee@gregkh> X-Mailer: git-send-email 2.41.0 MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=13222; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=x1TiTpFQGLP2r/d1XyA/DxK+XWsDSrx6Zo2RnD8S76s=; b=owGbwMvMwCRo6H6F97bub03G02pJDClnhbc/klrOasa5XX+u0LQ31clGgvUrNO7mf95r36d2c Mce578XOmJZGASZGGTFFFm+bOM5ur/ikKKXoe1pmDmsTCBDGLg4BWAiEZ8YFjTpbZJ645znNIOL 0+vanpg/U+7+ecIwPzEshoGrb9fmAk+eAi9b4w2LOmfNBAA= X-Developer-Key: i=gregkh@linuxfoundation.org; a=openpgp; fpr=F4B60CC5BF78C2214A313DCB3147D40DDB2DFB29 Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org From: Ivan Orlov Now that the driver core allows for struct class to be in read-only memory, making all 'class' structures to be declared at build time placing them into read-only memory, instead of having to be dynamically allocated at load time. Cc: Jason Gunthorpe Cc: Leon Romanovsky Cc: Dennis Dalessandro Cc: "Md. Haris Iqbal" Cc: Jack Wang Cc: Greg Kroah-Hartman Cc: Yishai Hadas Cc: Ivan Orlov Cc: Benjamin Tissoires Suggested-by: Greg Kroah-Hartman Signed-off-by: Ivan Orlov Signed-off-by: Greg Kroah-Hartman --- drivers/infiniband/core/uverbs_main.c | 35 +++++----- drivers/infiniband/hw/hfi1/device.c | 72 +++++++++----------- drivers/infiniband/hw/qib/qib_file_ops.c | 17 +++-- drivers/infiniband/ulp/rtrs/rtrs-clt.c | 19 +++--- drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c | 2 +- drivers/infiniband/ulp/rtrs/rtrs-srv.c | 15 ++-- drivers/infiniband/ulp/rtrs/rtrs-srv.h | 2 +- 7 files changed, 79 insertions(+), 83 deletions(-) diff --git a/drivers/infiniband/core/uverbs_main.c b/drivers/infiniband/core/uverbs_main.c index 7c9c79c13941..bf800f8cb3e4 100644 --- a/drivers/infiniband/core/uverbs_main.c +++ b/drivers/infiniband/core/uverbs_main.c @@ -72,12 +72,23 @@ enum { #define IB_UVERBS_BASE_DEV MKDEV(IB_UVERBS_MAJOR, IB_UVERBS_BASE_MINOR) static dev_t dynamic_uverbs_dev; -static struct class *uverbs_class; static DEFINE_IDA(uverbs_ida); static int ib_uverbs_add_one(struct ib_device *device); static void ib_uverbs_remove_one(struct ib_device *device, void *client_data); +static char *uverbs_devnode(const struct device *dev, umode_t *mode) +{ + if (mode) + *mode = 0666; + return kasprintf(GFP_KERNEL, "infiniband/%s", dev_name(dev)); +} + +static const struct class uverbs_class = { + .name = "infiniband_verbs", + .devnode = uverbs_devnode, +}; + /* * Must be called with the ufile->device->disassociate_srcu held, and the lock * must be held until use of the ucontext is finished. @@ -1117,7 +1128,7 @@ static int ib_uverbs_add_one(struct ib_device *device) } device_initialize(&uverbs_dev->dev); - uverbs_dev->dev.class = uverbs_class; + uverbs_dev->dev.class = &uverbs_class; uverbs_dev->dev.parent = device->dev.parent; uverbs_dev->dev.release = ib_uverbs_release_dev; uverbs_dev->groups[0] = &dev_attr_group; @@ -1235,13 +1246,6 @@ static void ib_uverbs_remove_one(struct ib_device *device, void *client_data) put_device(&uverbs_dev->dev); } -static char *uverbs_devnode(const struct device *dev, umode_t *mode) -{ - if (mode) - *mode = 0666; - return kasprintf(GFP_KERNEL, "infiniband/%s", dev_name(dev)); -} - static int __init ib_uverbs_init(void) { int ret; @@ -1262,16 +1266,13 @@ static int __init ib_uverbs_init(void) goto out_alloc; } - uverbs_class = class_create("infiniband_verbs"); - if (IS_ERR(uverbs_class)) { - ret = PTR_ERR(uverbs_class); + ret = class_register(&uverbs_class); + if (ret) { pr_err("user_verbs: couldn't create class infiniband_verbs\n"); goto out_chrdev; } - uverbs_class->devnode = uverbs_devnode; - - ret = class_create_file(uverbs_class, &class_attr_abi_version.attr); + ret = class_create_file(&uverbs_class, &class_attr_abi_version.attr); if (ret) { pr_err("user_verbs: couldn't create abi_version attribute\n"); goto out_class; @@ -1286,7 +1287,7 @@ static int __init ib_uverbs_init(void) return 0; out_class: - class_destroy(uverbs_class); + class_unregister(&uverbs_class); out_chrdev: unregister_chrdev_region(dynamic_uverbs_dev, @@ -1303,7 +1304,7 @@ static int __init ib_uverbs_init(void) static void __exit ib_uverbs_cleanup(void) { ib_unregister_client(&uverbs_client); - class_destroy(uverbs_class); + class_unregister(&uverbs_class); unregister_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_NUM_FIXED_MINOR); unregister_chrdev_region(dynamic_uverbs_dev, diff --git a/drivers/infiniband/hw/hfi1/device.c b/drivers/infiniband/hw/hfi1/device.c index 05be0d119f79..b0a00b7aaec5 100644 --- a/drivers/infiniband/hw/hfi1/device.c +++ b/drivers/infiniband/hw/hfi1/device.c @@ -10,8 +10,29 @@ #include "hfi.h" #include "device.h" -static struct class *class; -static struct class *user_class; +static char *hfi1_devnode(const struct device *dev, umode_t *mode) +{ + if (mode) + *mode = 0600; + return kasprintf(GFP_KERNEL, "%s", dev_name(dev)); +} + +static const struct class class = { + .name = "hfi1", + .devnode = hfi1_devnode, +}; + +static char *hfi1_user_devnode(const struct device *dev, umode_t *mode) +{ + if (mode) + *mode = 0666; + return kasprintf(GFP_KERNEL, "%s", dev_name(dev)); +} + +static const struct class user_class = { + .name = "hfi1_user", + .devnode = hfi1_user_devnode, +}; static dev_t hfi1_dev; int hfi1_cdev_init(int minor, const char *name, @@ -37,9 +58,9 @@ int hfi1_cdev_init(int minor, const char *name, } if (user_accessible) - device = device_create(user_class, NULL, dev, NULL, "%s", name); + device = device_create(&user_class, NULL, dev, NULL, "%s", name); else - device = device_create(class, NULL, dev, NULL, "%s", name); + device = device_create(&class, NULL, dev, NULL, "%s", name); if (IS_ERR(device)) { ret = PTR_ERR(device); @@ -72,26 +93,6 @@ const char *class_name(void) return hfi1_class_name; } -static char *hfi1_devnode(const struct device *dev, umode_t *mode) -{ - if (mode) - *mode = 0600; - return kasprintf(GFP_KERNEL, "%s", dev_name(dev)); -} - -static const char *hfi1_class_name_user = "hfi1_user"; -static const char *class_name_user(void) -{ - return hfi1_class_name_user; -} - -static char *hfi1_user_devnode(const struct device *dev, umode_t *mode) -{ - if (mode) - *mode = 0666; - return kasprintf(GFP_KERNEL, "%s", dev_name(dev)); -} - int __init dev_init(void) { int ret; @@ -102,27 +103,21 @@ int __init dev_init(void) goto done; } - class = class_create(class_name()); - if (IS_ERR(class)) { - ret = PTR_ERR(class); + ret = class_register(&class); + if (ret) { pr_err("Could not create device class (err %d)\n", -ret); unregister_chrdev_region(hfi1_dev, HFI1_NMINORS); goto done; } - class->devnode = hfi1_devnode; - user_class = class_create(class_name_user()); - if (IS_ERR(user_class)) { - ret = PTR_ERR(user_class); + ret = class_register(&user_class); + if (ret) { pr_err("Could not create device class for user accessible files (err %d)\n", -ret); - class_destroy(class); - class = NULL; - user_class = NULL; + class_unregister(&class); unregister_chrdev_region(hfi1_dev, HFI1_NMINORS); goto done; } - user_class->devnode = hfi1_user_devnode; done: return ret; @@ -130,11 +125,8 @@ int __init dev_init(void) void dev_cleanup(void) { - class_destroy(class); - class = NULL; - - class_destroy(user_class); - user_class = NULL; + class_unregister(&class); + class_unregister(&user_class); unregister_chrdev_region(hfi1_dev, HFI1_NMINORS); } diff --git a/drivers/infiniband/hw/qib/qib_file_ops.c b/drivers/infiniband/hw/qib/qib_file_ops.c index ef85bc8d9384..152952127f13 100644 --- a/drivers/infiniband/hw/qib/qib_file_ops.c +++ b/drivers/infiniband/hw/qib/qib_file_ops.c @@ -2250,7 +2250,9 @@ static ssize_t qib_write_iter(struct kiocb *iocb, struct iov_iter *from) return qib_user_sdma_writev(rcd, pq, iter_iov(from), from->nr_segs); } -static struct class *qib_class; +static const struct class qib_class = { + .name = "ipath", +}; static dev_t qib_dev; int qib_cdev_init(int minor, const char *name, @@ -2281,7 +2283,7 @@ int qib_cdev_init(int minor, const char *name, goto err_cdev; } - device = device_create(qib_class, NULL, dev, NULL, "%s", name); + device = device_create(&qib_class, NULL, dev, NULL, "%s", name); if (!IS_ERR(device)) goto done; ret = PTR_ERR(device); @@ -2325,9 +2327,8 @@ int __init qib_dev_init(void) goto done; } - qib_class = class_create("ipath"); - if (IS_ERR(qib_class)) { - ret = PTR_ERR(qib_class); + ret = class_register(&qib_class); + if (ret) { pr_err("Could not create device class (err %d)\n", -ret); unregister_chrdev_region(qib_dev, QIB_NMINORS); } @@ -2338,10 +2339,8 @@ int __init qib_dev_init(void) void qib_dev_cleanup(void) { - if (qib_class) { - class_destroy(qib_class); - qib_class = NULL; - } + if (class_is_registered(&qib_class)) + class_unregister(&qib_class); unregister_chrdev_region(qib_dev, QIB_NMINORS); } diff --git a/drivers/infiniband/ulp/rtrs/rtrs-clt.c b/drivers/infiniband/ulp/rtrs/rtrs-clt.c index b32941dd67cb..b6ee801fd0ff 100644 --- a/drivers/infiniband/ulp/rtrs/rtrs-clt.c +++ b/drivers/infiniband/ulp/rtrs/rtrs-clt.c @@ -45,7 +45,9 @@ static struct rtrs_rdma_dev_pd dev_pd = { }; static struct workqueue_struct *rtrs_wq; -static struct class *rtrs_clt_dev_class; +static const struct class rtrs_clt_dev_class = { + .name = "rtrs-client", +}; static inline bool rtrs_clt_is_connected(const struct rtrs_clt_sess *clt) { @@ -2698,7 +2700,7 @@ static struct rtrs_clt_sess *alloc_clt(const char *sessname, size_t paths_num, return ERR_PTR(-ENOMEM); } - clt->dev.class = rtrs_clt_dev_class; + clt->dev.class = &rtrs_clt_dev_class; clt->dev.release = rtrs_clt_dev_release; uuid_gen(&clt->paths_uuid); INIT_LIST_HEAD_RCU(&clt->paths_list); @@ -3151,16 +3153,17 @@ static const struct rtrs_rdma_dev_pd_ops dev_pd_ops = { static int __init rtrs_client_init(void) { - rtrs_rdma_dev_pd_init(0, &dev_pd); + int ret = 0; - rtrs_clt_dev_class = class_create("rtrs-client"); - if (IS_ERR(rtrs_clt_dev_class)) { + rtrs_rdma_dev_pd_init(0, &dev_pd); + ret = class_register(&rtrs_clt_dev_class); + if (ret) { pr_err("Failed to create rtrs-client dev class\n"); - return PTR_ERR(rtrs_clt_dev_class); + return ret; } rtrs_wq = alloc_workqueue("rtrs_client_wq", 0, 0); if (!rtrs_wq) { - class_destroy(rtrs_clt_dev_class); + class_unregister(&rtrs_clt_dev_class); return -ENOMEM; } @@ -3170,7 +3173,7 @@ static int __init rtrs_client_init(void) static void __exit rtrs_client_exit(void) { destroy_workqueue(rtrs_wq); - class_destroy(rtrs_clt_dev_class); + class_unregister(&rtrs_clt_dev_class); rtrs_rdma_dev_pd_deinit(&dev_pd); } diff --git a/drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c b/drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c index 5adba0f754b6..3f305e694fe8 100644 --- a/drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c +++ b/drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c @@ -164,7 +164,7 @@ static int rtrs_srv_create_once_sysfs_root_folders(struct rtrs_srv_path *srv_pat */ goto unlock; } - srv->dev.class = rtrs_dev_class; + srv->dev.class = &rtrs_dev_class; err = dev_set_name(&srv->dev, "%s", srv_path->s.sessname); if (err) goto unlock; diff --git a/drivers/infiniband/ulp/rtrs/rtrs-srv.c b/drivers/infiniband/ulp/rtrs/rtrs-srv.c index c38901e2c8f4..75e56604e462 100644 --- a/drivers/infiniband/ulp/rtrs/rtrs-srv.c +++ b/drivers/infiniband/ulp/rtrs/rtrs-srv.c @@ -27,7 +27,9 @@ MODULE_LICENSE("GPL"); #define MAX_HDR_SIZE PAGE_SIZE static struct rtrs_rdma_dev_pd dev_pd; -struct class *rtrs_dev_class; +const struct class rtrs_dev_class = { + .name = "rtrs-server", +}; static struct rtrs_srv_ib_ctx ib_ctx; static int __read_mostly max_chunk_size = DEFAULT_MAX_CHUNK_SIZE; @@ -2253,11 +2255,10 @@ static int __init rtrs_server_init(void) err); return err; } - rtrs_dev_class = class_create("rtrs-server"); - if (IS_ERR(rtrs_dev_class)) { - err = PTR_ERR(rtrs_dev_class); + err = class_register(&rtrs_dev_class); + if (err) goto out_err; - } + rtrs_wq = alloc_workqueue("rtrs_server_wq", 0, 0); if (!rtrs_wq) { err = -ENOMEM; @@ -2267,7 +2268,7 @@ static int __init rtrs_server_init(void) return 0; out_dev_class: - class_destroy(rtrs_dev_class); + class_unregister(&rtrs_dev_class); out_err: return err; } @@ -2275,7 +2276,7 @@ static int __init rtrs_server_init(void) static void __exit rtrs_server_exit(void) { destroy_workqueue(rtrs_wq); - class_destroy(rtrs_dev_class); + class_unregister(&rtrs_dev_class); rtrs_rdma_dev_pd_deinit(&dev_pd); } diff --git a/drivers/infiniband/ulp/rtrs/rtrs-srv.h b/drivers/infiniband/ulp/rtrs/rtrs-srv.h index 2f8a638e36fa..5e325b82ff33 100644 --- a/drivers/infiniband/ulp/rtrs/rtrs-srv.h +++ b/drivers/infiniband/ulp/rtrs/rtrs-srv.h @@ -129,7 +129,7 @@ struct rtrs_srv_ib_ctx { int ib_dev_count; }; -extern struct class *rtrs_dev_class; +extern const struct class rtrs_dev_class; void close_path(struct rtrs_srv_path *srv_path);