From nobody Sat Jan 10 06:58:01 2026 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 AF3E6E81DFE for ; Fri, 6 Oct 2023 13:57:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232433AbjJFN5F (ORCPT ); Fri, 6 Oct 2023 09:57:05 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35874 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231891AbjJFN5D (ORCPT ); Fri, 6 Oct 2023 09:57:03 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CD43F83 for ; Fri, 6 Oct 2023 06:57:02 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B5246C433C8; Fri, 6 Oct 2023 13:57:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1696600622; bh=idFvMmY1v+sDVWq37NottVN3J7CQKXQP9kUYUL8wMos=; h=From:To:Cc:Subject:Date:From; b=ADRO7YOJLk4pL+lR2Q8XerSDTEGbzB98vkl0QxOZsXjHXyWI0LSlJ+E3w1la71SgH kf+91v1a2jTV9WpLphFY2sw+VTDfn516Yeutp4mWhppi0sIFYKfnA6mSGRWMr5OkVq AN8YTb6D2Ge0oMNudjP9xrG0/BVRbWiXbMkQqyik= From: Greg Kroah-Hartman To: dri-devel@lists.freedesktop.org Cc: linux-kernel@vger.kernel.org, Greg Kroah-Hartman , Dafna Hirschfeld , Dani Liberman , Koby Elbaz , Oded Gabbay , Ofir Bitton , Ohad Sharabi , Stanislaw Gruszka , Tal Cohen , Tomer Tayar Subject: [PATCH] accel/habanalabs: make hl_class constant Date: Fri, 6 Oct 2023 15:56:55 +0200 Message-ID: <2023100654-pointless-stem-5ee1@gregkh> X-Mailer: git-send-email 2.42.0 MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=4013; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=idFvMmY1v+sDVWq37NottVN3J7CQKXQP9kUYUL8wMos=; b=owGbwMvMwCRo6H6F97bub03G02pJDKkKQupTl8/0sT7mGKj4PvFfbFzMWX+2F6eEOS8fLSuPe vDg7qHkjlgWBkEmBlkxRZYv23iO7q84pOhlaHsaZg4rE8gQBi5OAZjIs6cM82tlf2hOtHBbsv53 cDjTtUfT66pWeTEs6OVTf6g0fWpBWOG8E5/OvMuy2jc1DQA= X-Developer-Key: i=gregkh@linuxfoundation.org; a=openpgp; fpr=F4B60CC5BF78C2214A313DCB3147D40DDB2DFB29 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Now that the driver core allows for struct class to be in read-only memory, we should make all 'class' structures declared at build time placing them into read-only memory, instead of having to be dynamically allocated at runtime. This requires some passing of const struct class * around in the common habanalabs code as well as converting the structure itself. Cc: Dafna Hirschfeld Cc: Dani Liberman Cc: Koby Elbaz Cc: Oded Gabbay Cc: Ofir Bitton Cc: Ohad Sharabi Cc: Stanislaw Gruszka Cc: Tal Cohen Cc: Tomer Tayar Signed-off-by: Greg Kroah-Hartman --- drivers/accel/habanalabs/common/device.c | 2 +- drivers/accel/habanalabs/common/habanalabs.h | 2 +- .../accel/habanalabs/common/habanalabs_drv.c | 17 ++++++++++------- 3 files changed, 12 insertions(+), 9 deletions(-) diff --git a/drivers/accel/habanalabs/common/device.c b/drivers/accel/haban= alabs/common/device.c index b97339d1f7c6..4c28d8cfbb68 100644 --- a/drivers/accel/habanalabs/common/device.c +++ b/drivers/accel/habanalabs/common/device.c @@ -652,7 +652,7 @@ static void device_release_func(struct device *dev) * * Initialize a cdev and a Linux device for habanalabs's device. */ -static int device_init_cdev(struct hl_device *hdev, struct class *class, +static int device_init_cdev(struct hl_device *hdev, const struct class *cl= ass, int minor, const struct file_operations *fops, char *name, struct cdev *cdev, struct device **dev) diff --git a/drivers/accel/habanalabs/common/habanalabs.h b/drivers/accel/h= abanalabs/common/habanalabs.h index 2f027d5a8206..f1c78555e611 100644 --- a/drivers/accel/habanalabs/common/habanalabs.h +++ b/drivers/accel/habanalabs/common/habanalabs.h @@ -3308,7 +3308,7 @@ struct hl_device { u64 pcie_bar_phys[HL_PCI_NUM_BARS]; void __iomem *pcie_bar[HL_PCI_NUM_BARS]; void __iomem *rmmio; - struct class *hclass; + const struct class *hclass; struct cdev cdev; struct cdev cdev_ctrl; struct device *dev; diff --git a/drivers/accel/habanalabs/common/habanalabs_drv.c b/drivers/acc= el/habanalabs/common/habanalabs_drv.c index 7263e84c1a4d..4f1fdff3843d 100644 --- a/drivers/accel/habanalabs/common/habanalabs_drv.c +++ b/drivers/accel/habanalabs/common/habanalabs_drv.c @@ -27,7 +27,11 @@ MODULE_DESCRIPTION(HL_DRIVER_DESC); MODULE_LICENSE("GPL v2"); =20 static int hl_major; -static struct class *hl_class; + +static const struct class hl_class =3D { + .name =3D HL_NAME, +}; + static DEFINE_IDR(hl_devs_idr); static DEFINE_MUTEX(hl_devs_idr_lock); =20 @@ -317,7 +321,7 @@ static void copy_kernel_module_params_to_device(struct = hl_device *hdev) hdev->asic_prop.fw_security_enabled =3D is_asic_secured(hdev->asic_type); =20 hdev->major =3D hl_major; - hdev->hclass =3D hl_class; + hdev->hclass =3D &hl_class; hdev->memory_scrub =3D memory_scrub; hdev->reset_on_lockup =3D reset_on_lockup; hdev->boot_error_status_mask =3D boot_error_status_mask; @@ -691,10 +695,9 @@ static int __init hl_init(void) =20 hl_major =3D MAJOR(dev); =20 - hl_class =3D class_create(HL_NAME); - if (IS_ERR(hl_class)) { + rc =3D class_register(&hl_class); + if (rc) { pr_err("failed to allocate class\n"); - rc =3D PTR_ERR(hl_class); goto remove_major; } =20 @@ -712,7 +715,7 @@ static int __init hl_init(void) =20 remove_debugfs: hl_debugfs_fini(); - class_destroy(hl_class); + class_unregister(&hl_class); remove_major: unregister_chrdev_region(MKDEV(hl_major, 0), HL_MAX_MINORS); return rc; @@ -732,7 +735,7 @@ static void __exit hl_exit(void) */ hl_debugfs_fini(); =20 - class_destroy(hl_class); + class_unregister(&hl_class); unregister_chrdev_region(MKDEV(hl_major, 0), HL_MAX_MINORS); =20 idr_destroy(&hl_devs_idr); --=20 2.42.0