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[169.56.138.94]) by smtp.gmail.com with ESMTPSA id 2-20020a631342000000b0037487b6b018sm9802638pgt.0.2022.02.28.01.49.54 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Mon, 28 Feb 2022 01:49:56 -0800 (PST) From: Zhenguo Yao To: dan.j.williams@intel.com, vishal.l.verma@intel.com, dave.jiang@intel.com Cc: nvdimm@lists.linux.dev, yaozhenguo@jd.com, linux-kernel@vger.kernel.org, Zhenguo Yao Subject: [PATCH v1] device-dax: Adding match parameter to select which driver to match dax devices Date: Mon, 28 Feb 2022 17:49:38 +0800 Message-Id: <20220228094938.32153-1-yaozhenguo1@gmail.com> X-Mailer: git-send-email 2.32.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org device_dax driver always match dax devices by default. The other drivers only match devices by dax_id. There are situations which need kmem drvier match all the dax device at boot time. So adding a parameter to support this function. Signed-off-by: Zhenguo Yao --- drivers/dax/device.c | 3 +++ drivers/dax/kmem.c | 4 ++++ 2 files changed, 7 insertions(+) diff --git a/drivers/dax/device.c b/drivers/dax/device.c index dd8222a..a974cc1 100644 --- a/drivers/dax/device.c +++ b/drivers/dax/device.c @@ -452,6 +452,7 @@ int dev_dax_probe(struct dev_dax *dev_dax) } EXPORT_SYMBOL_GPL(dev_dax_probe); +unsigned int match = 1; static struct dax_device_driver device_dax_driver = { .probe = dev_dax_probe, /* all probe actions are unwound by devm, so .remove isn't necessary */ @@ -460,6 +461,7 @@ int dev_dax_probe(struct dev_dax *dev_dax) static int __init dax_init(void) { + device_dax_driver.match_always = match; return dax_driver_register(&device_dax_driver); } @@ -468,6 +470,7 @@ static void __exit dax_exit(void) dax_driver_unregister(&device_dax_driver); } +module_param(match, uint, 0644); MODULE_AUTHOR("Intel Corporation"); MODULE_LICENSE("GPL v2"); module_init(dax_init); diff --git a/drivers/dax/kmem.c b/drivers/dax/kmem.c index a376220..41ba713 100644 --- a/drivers/dax/kmem.c +++ b/drivers/dax/kmem.c @@ -214,9 +214,11 @@ static void dev_dax_kmem_remove(struct dev_dax *dev_dax) } #endif /* CONFIG_MEMORY_HOTREMOVE */ +unsigned int match; static struct dax_device_driver device_dax_kmem_driver = { .probe = dev_dax_kmem_probe, .remove = dev_dax_kmem_remove, + .match_always = 0, }; static int __init dax_kmem_init(void) @@ -228,6 +230,7 @@ static int __init dax_kmem_init(void) if (!kmem_name) return -ENOMEM; + device_dax_kmem_driver.match_always = match; rc = dax_driver_register(&device_dax_kmem_driver); if (rc) kfree_const(kmem_name); @@ -241,6 +244,7 @@ static void __exit dax_kmem_exit(void) kfree_const(kmem_name); } +module_param(match, uint, 0644); MODULE_AUTHOR("Intel Corporation"); MODULE_LICENSE("GPL v2"); module_init(dax_kmem_init); -- 1.8.3.1