linux-kernel - [PATCH 1/3] libnvdimm: provide module_nd

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Date:   Wed, 14 Mar 2018 19:25:06 +0100
From:   Johannes Thumshirn <jthumshirn@...e.de>
To:     Dan Williams <dan.j.williams@...el.com>,
        Ross Zwisler <ross.zwisler@...ux.intel.com>
Cc:     Linux Kernel Mailinglist <linux-kernel@...r.kernel.org>,
        Linux NV-DIMM Mailing List <linux-nvdimm@...ts.01.org>,
        Johannes Thumshirn <jthumshirn@...e.de>
Subject: [PATCH 1/3] libnvdimm: provide module_nd_driver wrapper

Provide a module_nd_driver() wrapper over simple nd_driver_register()
nd_driver_unregister() combinations in module_init() and module_exit()
respectively.

Note an explicit nd_driver_unregister() had to be implemented as nd
bus drivers did call device_unregister() direcly in the module_exit()
function.

Signed-off-by: Johannes Thumshirn <jthumshirn@...e.de>
---
 include/linux/nd.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/include/linux/nd.h b/include/linux/nd.h
index 5dc6b695437d..43c181a6add5 100644
--- a/include/linux/nd.h
+++ b/include/linux/nd.h
@@ -180,6 +180,12 @@ struct nd_region;
 void nvdimm_region_notify(struct nd_region *nd_region, enum nvdimm_event event);
 int __must_check __nd_driver_register(struct nd_device_driver *nd_drv,
 		struct module *module, const char *mod_name);
+static inline void nd_driver_unregister(struct nd_device_driver *drv)
+{
+	driver_unregister(&drv->drv);
+}
 #define nd_driver_register(driver) \
 	__nd_driver_register(driver, THIS_MODULE, KBUILD_MODNAME)
+#define module_nd_driver(driver) \
+	module_driver(driver, nd_driver_register, nd_driver_unregister)
 #endif /* __LINUX_ND_H__ */
-- 
2.13.6