module: allow ndiswrapper to use GPL-only symbols

A change after 2.6.24 broke ndiswrapper by accidentally removing its
access to GPL-only symbols. Revert that change and add comments about
the reasons why ndiswrapper and driverloader are treated in a special
way.

Signed-off-by: Pavel Roskin <[e-mail]>
Acked-by: Greg KH <[e-mail]>
Acked-by: Ingo Molnar <[e-mail]>
Cc: Rusty Russell <[e-mail]>
Cc: Jon Masters <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

kernel/module.c

···
 	/* Set up license info based on the info section */
 	set_license(mod, get_modinfo(sechdrs, infoindex, "license"));
 
+	/*
+	 * ndiswrapper is under GPL by itself, but loads proprietary modules.
+	 * Don't use add_taint_module(), as it would prevent ndiswrapper from
+	 * using GPL-only symbols it needs.
+	 */
 	if (strcmp(mod->name, "ndiswrapper") == 0)
-		add_taint_module(mod, TAINT_PROPRIETARY_MODULE);
+		add_taint(TAINT_PROPRIETARY_MODULE);
+
+	/* driverloader was caught wrongly pretending to be under GPL */
 	if (strcmp(mod->name, "driverloader") == 0)
 		add_taint_module(mod, TAINT_PROPRIETARY_MODULE);