From: Al Viro <viro@ZenIV.linux.org.uk>
To: Christopher Li <sparse@chrisli.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>, linux-sparse@vger.kernel.org
Subject: Re: Casting away noderef and address spaces?
Date: Mon, 22 Dec 2008 20:57:50 +0000 [thread overview]
Message-ID: <20081222205750.GK28946@ZenIV.linux.org.uk> (raw)
In-Reply-To: <70318cbf0812221206o1b5e2aech2a36f723afc63ffa@mail.gmail.com>
On Mon, Dec 22, 2008 at 12:06:03PM -0800, Christopher Li wrote:
> On Sun, Dec 21, 2008 at 9:36 PM, Rusty Russell <rusty@rustcorp.com.au> wrote:
> > #define convert(v) \
> > (*(__attribute__((address_space(0), force)) typeof(&v))(v))
> >
> Am I reading it right? You are trying to dereferenc a type instead of a pointer?
>
> I don't think you can do that with sparse.
The right solution is
(*(typeof(v) __attribute__((address_space(0), force)) *)(&v))
Cast there will take a pointer to type of V and force-cast it to pointer to
unqualified type of V. *(cast)&v will do the obvious thing. Will trim
both the AS and noderef.
next prev parent reply other threads:[~2008-12-22 20:57 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-22 5:36 Casting away noderef and address spaces? Rusty Russell
2008-12-22 20:06 ` Christopher Li
2008-12-22 20:57 ` Al Viro [this message]
2008-12-22 21:23 ` Christopher Li
2008-12-22 21:39 ` Al Viro
2008-12-22 22:33 ` Christopher Li
2008-12-22 22:42 ` Harvey Harrison
2008-12-22 22:57 ` Sam Ravnborg
2008-12-22 23:53 ` Alexey Zaytsev
2008-12-22 23:55 ` Johannes Berg
2008-12-23 0:20 ` Alexey Zaytsev
2008-12-23 0:35 ` Johannes Berg
2008-12-23 0:37 ` Johannes Berg
2008-12-23 1:25 ` Christopher Li
2008-12-23 9:59 ` Johannes Berg
2008-12-24 8:34 ` Christopher Li
2008-12-23 2:14 ` Rusty Russell
2008-12-23 3:02 ` Christopher Li
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