linux-kernel - Re: [PATCH 2/3 RESEND] ptrace: cleanup address space conversion on ptrace

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Message-ID: <87sk23w2sn.fsf@gmail.com>
Date:	Wed, 25 Aug 2010 16:48:40 +0900
From:	Namhyung Kim <namhyung@...il.com>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Christoph Hellwig <hch@...radead.org>,
	Roland McGrath <roland@...hat.com>,
	Oleg Nesterov <oleg@...hat.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/3 RESEND] ptrace: cleanup address space conversion on ptrace_request()

Arnd Bergmann <arnd@...db.de> writes:
> I don't think we ever rely on 'data' being signed, and user space
> sees it as 'void *' anyway, so it should be possible to just turn
> it into 'unsigned long'.
>

After I've checked all arch_ptrace() code, I can think there is no specific
reason @addr and @data to be signed long types. Most of archs use them
as if they were unsigned. So I'll prepare a patch series to change this
and some cleanups of ptrace_request() and all of arch_ptrace() if no
objection exists.

Thanks.

-- 
Regards,
Namhyung Kim
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