Add __exit_p() to match existing __devexit_p().

This patch fixes de2104x net driver up by doing the following things:
(1) add __exit_p() to <linux/init.h>
(2) add the unused attributed to __exit routines for non-modules
(3) use __exit_p() to refer to de_remove_one()

drivers/net/tulip/de2104x.c

@@ -2217,8 +2217,7 @@ static struct pci_driver de_driver = {
 	.name		= DRV_NAME,
 	.id_table	= de_pci_tbl,
 	.probe		= de_init_one,
-#warning only here to fix build.  should be __exit_p not __devexit_p.
-	.remove		= __devexit_p(de_remove_one),
+	.remove		= __exit_p(de_remove_one),
 #ifdef CONFIG_PM
 	.suspend	= de_suspend,
 	.resume		= de_resume,

include/linux/init.h

@@ -42,10 +42,15 @@
    discard it in modules) */
 #define __init		__attribute__ ((__section__ (".init.text")))
 #define __initdata	__attribute__ ((__section__ (".init.data")))
-#define __exit		__attribute__ ((__section__(".exit.text")))
 #define __exitdata	__attribute__ ((__section__(".exit.data")))
 #define __exit_call	__attribute__ ((unused,__section__ (".exitcall.exit")))
 
+#ifdef MODULE
+#define __exit		__attribute__ ((__section__(".exit.text")))
+#else
+#define __exit		__attribute__ ((unused,__section__(".exit.text")))
+#endif
+
 /* For assembly routines */
 #define __INIT		.section	".init.text","ax"
 #define __FINIT		.previous
@@ -185,4 +190,10 @@ extern struct kernel_param __setup_start, __setup_end;
 #define __devexit_p(x) NULL
 #endif
 
+#ifdef MODULE
+#define __exit_p(x) x
+#else
+#define __exit_p(x) NULL
+#endif
+
 #endif /* _LINUX_INIT_H */