linux-kernel - Re: [RFC PATCH 3/3a] ptrace: add _ptrace_may

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Message-ID: <20090506204700.GA24160@infradead.org>
Date:	Wed, 6 May 2009 16:47:07 -0400
From:	Christoph Hellwig <hch@...radead.org>
To:	Roland McGrath <roland@...hat.com>
Cc:	Ingo Molnar <mingo@...e.hu>, Oleg Nesterov <oleg@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Chris Wright <chrisw@...s-sol.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH 3/3a] ptrace: add _ptrace_may_access()

On Wed, May 06, 2009 at 01:32:24PM -0700, Roland McGrath wrote:
> > Something like the patch below allows the reuse of the locked 
> > version of __ptrace_may_access and pushes the int->bool conversion 
> > into an inline.
> 
> I think it would be cleaner and safe/simple enough to invert the public
> ptrace_may_access() to just return the int and invert the ! on all the
> callers (all one in fs/proc/task_mmu.c and all four in fs/proc/base.c).

Yeah.  And at the same time we might move it out of ptrace.c and give it
a more descriptive name given that most users aren't related to ptrace
in any way.  may_inspect_task maybe?  I'm good at naming things..

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