Remove "unsafe" from module struct

Adrian Bunk points out that "unsafe" was used to mark modules touched by
the deprecated MOD_INC_USE_COUNT interface, which has long gone.  It's time
to remove the member from the module structure, as well.

If you want a module which can't unload, don't register an exit function.

(Vlad Yasevich says SCTP is now safe to unload, so just remove the
__unsafe there).

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Acked-by: Shannon Nelson <shannon.nelson@intel.com>
Acked-by: Dan Williams <dan.j.williams@intel.com>
Acked-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Cc: Sridhar Samudrala <sri@us.ibm.com>
Cc: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/dma/iop-adma.c

@@ -1446,21 +1446,20 @@ static struct platform_driver iop_adma_driver = {
 
 static int __init iop_adma_init (void)
 {
-	/* it's currently unsafe to unload this module */
-	/* if forced, worst case is that rmmod hangs */
-	__unsafe(THIS_MODULE);
-
 	return platform_driver_register(&iop_adma_driver);
 }
 
+/* it's currently unsafe to unload this module */
+#if 0
 static void __exit iop_adma_exit (void)
 {
 	platform_driver_unregister(&iop_adma_driver);
 	return;
 }
+module_exit(iop_adma_exit);
+#endif
 
 module_init(iop_adma_init);
-module_exit(iop_adma_exit);
 
 MODULE_AUTHOR("Intel Corporation");
 MODULE_DESCRIPTION("IOP ADMA Engine Driver");