linux-kernel - Re: [PATCH 1/9] procfs: use flags to deny or allow access to /proc/<pid>/$entry

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Message-ID: <CALCETrU1xjXvwtuYyqGhDgch7cZgP_LWLNDC8b8oeEtwJ0UNmg@mail.gmail.com>
Date:	Mon, 26 May 2014 12:17:48 -0700
From:	Andy Lutomirski <luto@...capital.net>
To:	Djalal Harouni <tixxdz@...ndz.org>
Cc:	Kees Cook <keescook@...omium.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Alexey Dobriyan <adobriyan@...il.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Al Viro <viro@...iv.linux.org.uk>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ingo Molnar <mingo@...nel.org>,
	Oleg Nesterov <oleg@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Linux FS Devel <linux-fsdevel@...r.kernel.org>
Subject: Re: [PATCH 1/9] procfs: use flags to deny or allow access to /proc/<pid>/$entry

On Mon, May 26, 2014 at 12:13 PM, Djalal Harouni <tixxdz@...ndz.org> wrote:
> On Mon, May 26, 2014 at 11:06:40AM -0700, Andy Lutomirski wrote:
>> On Mon, May 26, 2014 at 10:21 AM, Djalal Harouni <tixxdz@...ndz.org> wrote:
>> > I would like to keep it enum, enum is type-safe and I want to follow the
>> > semantics of /proc/pid/stat and others:
>>
>> It's not type-safe the way you're doing it, though.
> Can you please shed some light Andy, thank you in advance!

You're casting these things back and forth.  If you were storing enum
values in an enum-typed variable, great, but you're not.

--Andy
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