From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from jpms-ob01-os7.noc.sony.co.jp (jpms-ob01-os7.noc.sony.co.jp [211.125.139.71]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9DEAE33EAF9; Wed, 22 Apr 2026 09:49:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=211.125.139.71 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776851368; cv=none; b=G95xjVNnaLSbDILivxEBcmEBgXiEZ0tEP+eAE7Gj2k8l+OTMU+4xJTkh8qNbAc1d/ZJ60fVNmnKVOnPaPOnPCpbXtcWhihFcPATBY641SQvSNAiSeCXEmbQSIoPRim7Xj8G5okc/hzUxFQrBjwVwTX7/WVDOhmdwGq2PFeCxuYY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776851368; c=relaxed/simple; bh=B6q++mSn5JRFnfsuFzhjJYD81tALEbBXnDVL8mzSizw=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=nRYQtw2QfeExAErs2UnV0L0N09Xr99Pgv6A8lOWVESuwhdIOLbLt0ZLfqa8uYbsy/S1AX4DzpZbYnDUbFIsNr5epa9FRax9fDOzJXJe2cQAi2yjyLV8NTVVIclIPLLpY4POFlPT32hASkNu+iFCmtXAVRofrhPpvFtaABo8TCUI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=sony.com; spf=fail smtp.mailfrom=sony.com; dkim=pass (2048-bit key) header.d=sony.com header.i=@sony.com header.b=nDbMoeQR; arc=none smtp.client-ip=211.125.139.71 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=sony.com Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=sony.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=sony.com header.i=@sony.com header.b="nDbMoeQR" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sony.com; s=s1jp; t=1776851367; x=1808387367; h=from:date:subject:mime-version:content-transfer-encoding: message-id:references:in-reply-to:to:cc; bh=nBBO0mRcqdSPWhBtPPX6nCzgt6YjZR2JfRp0jrfAJWs=; b=nDbMoeQRwc0ok9pJaT+QELdKUJ4/JlSs2NVxbAJzidIu5WyOZ4W4uS3c 8R6QiCFz3A8OggvJjXaRGEHIu5C/ubV9f8A5u07F7nQLb2TWOOtjTEJCr 41hF3sFZepihg7rOwBUq4k7pXgxS059l8BFEVxMjJmNOLQoBDoErqKGrZ d9pTvpWvO/+Zf09WJB+vBSv3R2AceWQ22jxKznc2ekJf+Fx4e8dbVMful /j/NfdhXdDDUI/I1H33gu3zxmF6DMF3afzO50alGww7K1TRBGNvjNF/H9 8O977SeLoGlM4e+THb4oPkFGqOtR7JIt0A9NKw1SBWDAgPD7xhjlILU+y A==; X-CSE-ConnectionGUID: z2R/mJ7PQD6NFkP2LizPkQ== X-CSE-MsgGUID: hPNxaClSSmqjllMdZWB1dw== Received: from unknown (HELO jpmta-ob02-os7.noc.sony.co.jp) ([IPv6:2001:cf8:acf:1104::7]) by jpms-ob01-os7.noc.sony.co.jp with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Apr 2026 18:49:18 +0900 X-CSE-ConnectionGUID: BatEHnjgTPuKMzooe57vjg== X-CSE-MsgGUID: GQ4OY4IqT6SmX09kFmUv5A== X-IronPort-AV: E=Sophos;i="6.23,192,1770562800"; d="scan'208";a="51446134" Received: from unknown (HELO [127.0.1.1]) ([IPv6:2001:cf8:1:573:0:dddd:eb3e:119e]) by jpmta-ob02-os7.noc.sony.co.jp with ESMTP; 22 Apr 2026 18:49:17 +0900 From: Shashank Balaji Date: Wed, 22 Apr 2026 18:49:05 +0900 Subject: [PATCH v3 3/4] driver core: platform: set mod_name in driver registration Precedence: bulk X-Mailing-List: rust-for-linux@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260422-acpi_mod_name-v3-3-a184eff9ff6f@sony.com> References: <20260422-acpi_mod_name-v3-0-a184eff9ff6f@sony.com> In-Reply-To: <20260422-acpi_mod_name-v3-0-a184eff9ff6f@sony.com> To: Suzuki K Poulose , Mike Leach , James Clark , Alexander Shishkin , Maxime Coquelin , Alexandre Torgue , Greg Kroah-Hartman , "Rafael J. Wysocki" , Danilo Krummrich , Miguel Ojeda , Boqun Feng , Gary Guo , =?utf-8?q?Bj=C3=B6rn_Roy_Baron?= , Benno Lossin , Andreas Hindborg , Alice Ryhl , Trevor Gross , Richard Cochran , Jonathan Corbet , Shuah Khan Cc: Rahul Bukte , Shashank Balaji , linux-kernel@vger.kernel.org, coresight@lists.linaro.org, linux-arm-kernel@lists.infradead.org, driver-core@lists.linux.dev, rust-for-linux@vger.kernel.org, linux-doc@vger.kernel.org, Daniel Palmer , Tim Bird X-Mailer: b4 0.16-dev-3bfbc X-Developer-Signature: v=1; a=openpgp-sha256; l=10432; i=shashank.mahadasyam@sony.com; h=from:subject:message-id; bh=B6q++mSn5JRFnfsuFzhjJYD81tALEbBXnDVL8mzSizw=; b=owGbwMvMwCU2bX1+URVTXyjjabUkhswXM2cIuCtMnVRoYV/zlPPYv2vqbCHJ85SjuRNDGTw2v 5xV8eNkRykLgxgXg6yYIkupUvWvvSuClvScea0IM4eVCWQIAxenAEzET5rhf2D8RsHHYuHLmIBa jixkiJi1RKLc8NnkqD+u3/zU2QWqGf5paTNXnppvb/GtLnTi++C3JiofvIVYP9X0zPsiUzn37Xx 2AA== X-Developer-Key: i=shashank.mahadasyam@sony.com; a=openpgp; fpr=75227BFABDA852A48CCCEB2196AF6F727A028E55 Pass KBUILD_MODNAME through the driver registration macro so that the driver core can create the module symlink in sysfs for built-in drivers, and fixup all callers. The Rust platform adapter is updated to pass the module name through to the new parameter. Tested on qemu with: - x86 defconfig + CONFIG_RUST - arm64 defconfig + CONFIG_RUST + CONFIG_CORESIGHT stuff Examples after this patch: /sys/bus/platform/drivers/... coresight-itnoc/module -> coresight_tnoc coresight-static-tpdm/module -> coresight_tpdm coresight-catu-platform/module -> coresight_catu serial8250/module -> 8250 acpi-ged/module -> acpi vmclock/module -> ptp_vmclock Co-developed-by: Rahul Bukte Signed-off-by: Rahul Bukte Signed-off-by: Shashank Balaji --- This patch depends on patches 1 and 2. --- drivers/base/platform.c | 21 ++++++++++++++------- drivers/hwtracing/coresight/coresight-core.c | 5 +++-- include/linux/coresight.h | 5 +++-- include/linux/platform_device.h | 17 +++++++++-------- rust/kernel/platform.rs | 4 +++- 5 files changed, 32 insertions(+), 20 deletions(-) diff --git a/drivers/base/platform.c b/drivers/base/platform.c index 75b4698d0e58..2b0cc0889386 100644 --- a/drivers/base/platform.c +++ b/drivers/base/platform.c @@ -901,11 +901,14 @@ EXPORT_SYMBOL_GPL(platform_device_register_full); * __platform_driver_register - register a driver for platform-level devices * @drv: platform driver structure * @owner: owning module/driver + * @mod_name: module name string */ -int __platform_driver_register(struct platform_driver *drv, struct module *owner) +int __platform_driver_register(struct platform_driver *drv, struct module *owner, + const char *mod_name) { drv->driver.owner = owner; drv->driver.bus = &platform_bus_type; + drv->driver.mod_name = mod_name; return driver_register(&drv->driver); } @@ -938,6 +941,7 @@ static int is_bound_to_driver(struct device *dev, void *driver) * @drv: platform driver structure * @probe: the driver probe routine, probably from an __init section * @module: module which will be the owner of the driver + * @mod_name: module name string * * Use this instead of platform_driver_register() when you know the device * is not hotpluggable and has already been registered, and you want to @@ -955,7 +959,8 @@ static int is_bound_to_driver(struct device *dev, void *driver) */ int __init_or_module __platform_driver_probe(struct platform_driver *drv, int (*probe)(struct platform_device *), - struct module *module) + struct module *module, + const char *mod_name) { int retval; @@ -983,7 +988,7 @@ int __init_or_module __platform_driver_probe(struct platform_driver *drv, /* temporary section violation during probe() */ drv->probe = probe; - retval = __platform_driver_register(drv, module); + retval = __platform_driver_register(drv, module, mod_name); if (retval) return retval; @@ -1011,6 +1016,7 @@ EXPORT_SYMBOL_GPL(__platform_driver_probe); * @data: platform specific data for this platform device * @size: size of platform specific data * @module: module which will be the owner of the driver + * @mod_name: module name string * * Use this in legacy-style modules that probe hardware directly and * register a single platform device and corresponding platform driver. @@ -1021,7 +1027,7 @@ struct platform_device * __init_or_module __platform_create_bundle(struct platform_driver *driver, int (*probe)(struct platform_device *), struct resource *res, unsigned int n_res, - const void *data, size_t size, struct module *module) + const void *data, size_t size, struct module *module, const char *mod_name) { struct platform_device *pdev; int error; @@ -1044,7 +1050,7 @@ __platform_create_bundle(struct platform_driver *driver, if (error) goto err_pdev_put; - error = __platform_driver_probe(driver, probe, module); + error = __platform_driver_probe(driver, probe, module, mod_name); if (error) goto err_pdev_del; @@ -1064,6 +1070,7 @@ EXPORT_SYMBOL_GPL(__platform_create_bundle); * @drivers: an array of drivers to register * @count: the number of drivers to register * @owner: module owning the drivers + * @mod_name: module name string * * Registers platform drivers specified by an array. On failure to register a * driver, all previously registered drivers will be unregistered. Callers of @@ -1073,7 +1080,7 @@ EXPORT_SYMBOL_GPL(__platform_create_bundle); * Returns: 0 on success or a negative error code on failure. */ int __platform_register_drivers(struct platform_driver * const *drivers, - unsigned int count, struct module *owner) + unsigned int count, struct module *owner, const char *mod_name) { unsigned int i; int err; @@ -1081,7 +1088,7 @@ int __platform_register_drivers(struct platform_driver * const *drivers, for (i = 0; i < count; i++) { pr_debug("registering platform driver %ps\n", drivers[i]); - err = __platform_driver_register(drivers[i], owner); + err = __platform_driver_register(drivers[i], owner, mod_name); if (err < 0) { pr_err("failed to register platform driver %ps: %d\n", drivers[i], err); diff --git a/drivers/hwtracing/coresight/coresight-core.c b/drivers/hwtracing/coresight/coresight-core.c index 9e93b22cb056..a9ff0b3d8717 100644 --- a/drivers/hwtracing/coresight/coresight-core.c +++ b/drivers/hwtracing/coresight/coresight-core.c @@ -1645,7 +1645,8 @@ module_init(coresight_init); module_exit(coresight_exit); int __coresight_init_driver(const char *drv, struct amba_driver *amba_drv, - struct platform_driver *pdev_drv, struct module *owner) + struct platform_driver *pdev_drv, struct module *owner, + const char *mod_name) { int ret; @@ -1655,7 +1656,7 @@ int __coresight_init_driver(const char *drv, struct amba_driver *amba_drv, return ret; } - ret = __platform_driver_register(pdev_drv, owner); + ret = __platform_driver_register(pdev_drv, owner, mod_name); if (!ret) return 0; diff --git a/include/linux/coresight.h b/include/linux/coresight.h index 4f58bfc59080..bcc6c1754dba 100644 --- a/include/linux/coresight.h +++ b/include/linux/coresight.h @@ -698,9 +698,10 @@ coresight_find_output_type(struct coresight_platform_data *pdata, union coresight_dev_subtype subtype); #define coresight_init_driver(drv, amba_drv, pdev_drv) \ - __coresight_init_driver(drv, amba_drv, pdev_drv, THIS_MODULE) + __coresight_init_driver(drv, amba_drv, pdev_drv, THIS_MODULE, KBUILD_MODNAME) int __coresight_init_driver(const char *drv, struct amba_driver *amba_drv, - struct platform_driver *pdev_drv, struct module *owner); + struct platform_driver *pdev_drv, struct module *owner, + const char *mod_name); void coresight_remove_driver(struct amba_driver *amba_drv, struct platform_driver *pdev_drv); diff --git a/include/linux/platform_device.h b/include/linux/platform_device.h index 975400a472e3..26e6a43358e2 100644 --- a/include/linux/platform_device.h +++ b/include/linux/platform_device.h @@ -293,18 +293,19 @@ struct platform_driver { * use a macro to avoid include chaining to get THIS_MODULE */ #define platform_driver_register(drv) \ - __platform_driver_register(drv, THIS_MODULE) + __platform_driver_register(drv, THIS_MODULE, KBUILD_MODNAME) extern int __platform_driver_register(struct platform_driver *, - struct module *); + struct module *, const char *mod_name); extern void platform_driver_unregister(struct platform_driver *); /* non-hotpluggable platform devices may use this so that probe() and * its support may live in __init sections, conserving runtime memory. */ #define platform_driver_probe(drv, probe) \ - __platform_driver_probe(drv, probe, THIS_MODULE) + __platform_driver_probe(drv, probe, THIS_MODULE, KBUILD_MODNAME) extern int __platform_driver_probe(struct platform_driver *driver, - int (*probe)(struct platform_device *), struct module *module); + int (*probe)(struct platform_device *), struct module *module, + const char *mod_name); static inline void *platform_get_drvdata(const struct platform_device *pdev) { @@ -368,19 +369,19 @@ static int __init __platform_driver##_init(void) \ device_initcall(__platform_driver##_init); \ #define platform_create_bundle(driver, probe, res, n_res, data, size) \ - __platform_create_bundle(driver, probe, res, n_res, data, size, THIS_MODULE) + __platform_create_bundle(driver, probe, res, n_res, data, size, THIS_MODULE, KBUILD_MODNAME) extern struct platform_device *__platform_create_bundle( struct platform_driver *driver, int (*probe)(struct platform_device *), struct resource *res, unsigned int n_res, - const void *data, size_t size, struct module *module); + const void *data, size_t size, struct module *module, const char *mod_name); int __platform_register_drivers(struct platform_driver * const *drivers, - unsigned int count, struct module *owner); + unsigned int count, struct module *owner, const char *mod_name); void platform_unregister_drivers(struct platform_driver * const *drivers, unsigned int count); #define platform_register_drivers(drivers, count) \ - __platform_register_drivers(drivers, count, THIS_MODULE) + __platform_register_drivers(drivers, count, THIS_MODULE, KBUILD_MODNAME) #ifdef CONFIG_SUSPEND extern int platform_pm_suspend(struct device *dev); diff --git a/rust/kernel/platform.rs b/rust/kernel/platform.rs index 8917d4ee499f..2d626eecc450 100644 --- a/rust/kernel/platform.rs +++ b/rust/kernel/platform.rs @@ -82,7 +82,9 @@ unsafe fn register( } // SAFETY: `pdrv` is guaranteed to be a valid `DriverType`. - to_result(unsafe { bindings::__platform_driver_register(pdrv.get(), module.0) }) + to_result(unsafe { + bindings::__platform_driver_register(pdrv.get(), module.0, name.as_char_ptr()) + }) } unsafe fn unregister(pdrv: &Opaque) { -- 2.43.0