linux-kernel - [PATCH 2.6.20-rc1 04/10] EISA registration with !CONFIG

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Date:	Wed, 20 Dec 2006 12:01:49 +0000 (GMT)
From:	"Maciej W. Rozycki" <macro@...ux-mips.org>
To:	Andrew Morton <akpm@...l.org>, Jeff Garzik <jgarzik@...ox.com>
cc:	linux-mips@...ux-mips.org, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org
Subject: [PATCH 2.6.20-rc1 04/10] EISA registration with !CONFIG_EISA

 This is a change for the EISA bus support to permit drivers to call 
un/registration functions even if EISA support has not been enabled.  This 
is similar to what PCI (and now TC) does and reduces the need for #ifdef 
clutter.

Signed-off-by: Maciej W. Rozycki <macro@...ux-mips.org>
---

 This is required by the updated defxx driver.

 Please apply.

  Maciej

patch-mips-2.6.18-20060920-eisa-register-0
diff -up --recursive --new-file linux-mips-2.6.18-20060920.macro/include/linux/eisa.h linux-mips-2.6.18-20060920/include/linux/eisa.h
--- linux-mips-2.6.18-20060920.macro/include/linux/eisa.h	2003-10-10 04:00:31.000000000 +0000
+++ linux-mips-2.6.18-20060920/include/linux/eisa.h	2006-12-14 22:43:31.000000000 +0000
@@ -67,10 +67,20 @@ struct eisa_driver {
 
 #define to_eisa_driver(drv) container_of(drv,struct eisa_driver, driver)
 
+/* These external functions are only available when EISA support is enabled. */
+#ifdef CONFIG_EISA
+
 extern struct bus_type eisa_bus_type;
 int eisa_driver_register (struct eisa_driver *edrv);
 void eisa_driver_unregister (struct eisa_driver *edrv);
 
+#else /* !CONFIG_EISA */
+
+static inline int eisa_driver_register (struct eisa_driver *edrv) { return 0; }
+static inline void eisa_driver_unregister (struct eisa_driver *edrv) { }
+
+#endif /* !CONFIG_EISA */
+
 /* Mimics pci.h... */
 static inline void *eisa_get_drvdata (struct eisa_device *edev)
 {
-
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