linux-kernel - cocci: remove unnecessary casts of void * while avoiding casts with __user or _

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Message-ID: <1503938959.2040.6.camel@perches.com>
Date:   Mon, 28 Aug 2017 09:49:19 -0700
From:   Joe Perches <joe@...ches.com>
To:     cocci <cocci@...teme.lip6.fr>
Cc:     LKML <linux-kernel@...r.kernel.org>
Subject: cocci: remove unnecessary casts of void * while avoiding casts with
 __user or __force ?

A simple cocci script that removes unnecessary casts of
a void * will also remove casts with __force or __user

e.g.:

-       xemaclite_aligned_write(address_ptr, (u32 __force *) addr, ETH_ALEN);
+       xemaclite_aligned_write(address_ptr, addr, ETH_ALEN);

Is there a simple mechanism to avoid converting those?

$ cat void.cocci
@@
type T;
void *v;
expression e;
@@

-	e = (T *)v;
+	e = v;

@@
identifier f;
type T;
void *v;
@@

	f(...,
-	(T *)v,
+	v,
	...)

$