linux-kernel - [PATCH 1/8] pnp: Add helper macro for pnp_register

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Message-Id: <1426538797-28131-2-git-send-email-peterhuewe@gmx.de>
Date:	Mon, 16 Mar 2015 21:46:30 +0100
From:	Peter Huewe <peterhuewe@....de>
To:	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>
Cc:	linux-kernel@...r.kernel.org, Peter Huewe <peterhuewe@....de>,
	Lars-Peter Clausen <lars@...afoo.de>,
	Greg Kroah-Hartman <gregkh@...e.de>
Subject: [PATCH 1/8] pnp: Add helper macro for pnp_register_driver boilerplate

This patch introduces the module_pnp_driver macro which is a
convenience macro for PNP driver modules similar to module_pci_driver.
It is intended to be used by drivers which init/exit section does nothing
but register/unregister the PNP driver. By using this macro it is
possible to eliminate a few lines of boilerplate code per PNP driver.

Based on work done by Lars-Peter Clausen <lars@...afoo.de> for other
busses (i2c and spi) and Greg KH for PCI.

Cc: Lars-Peter Clausen <lars@...afoo.de>
Cc: Greg Kroah-Hartman <gregkh@...e.de>
Signed-off-by: Peter Huewe <peterhuewe@....de>
---
 include/linux/pnp.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/include/linux/pnp.h b/include/linux/pnp.h
index 6512e9cbc6d5..5df733b8f704 100644
--- a/include/linux/pnp.h
+++ b/include/linux/pnp.h
@@ -510,4 +510,16 @@ static inline void pnp_unregister_driver(struct pnp_driver *drv) { }
 
 #endif /* CONFIG_PNP */
 
+/**
+ * module_pnp_driver() - Helper macro for registering a PnP driver
+ * @__pnp_driver: pnp_driver struct
+ *
+ * Helper macro for PnP drivers which do not do anything special in module
+ * init/exit. This eliminates a lot of boilerplate. Each module may only
+ * use this macro once, and calling it replaces module_init() and module_exit()
+ */
+#define module_pnp_driver(__pnp_driver) \
+	module_driver(__pnp_driver, pnp_register_driver, \
+				    pnp_unregister_driver)
+
 #endif /* _LINUX_PNP_H */
-- 
2.0.5

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