From: "Michal Nazarewicz" <mina86@mina86.com>
To: Andrea Arcangeli <aarcange@redhat.com>,
Artem Bityutskiy <dedekind1@gmail.com>
Cc: Phil Carmody <ext-phil.2.carmody@nokia.com>,
akpm@linux-foundation.org, cl@linux-foundation.org,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/1] mm: make read-only accessors take const pointer parameters
Date: Wed, 20 Apr 2011 13:20:19 +0200 [thread overview]
Message-ID: <op.vt8hr5j73l0zgt@mnazarewicz-glaptop> (raw)
In-Reply-To: <1303291717.2700.20.camel@localhost>
On Wed, 20 Apr 2011 11:28:37 +0200, Artem Bityutskiy <dedekind1@gmail.com>
wrote:
> I think it is good when small core functions like this are strict and
> use 'const' whenever possible, even though 'const' is so imperfect in C.
>
> Let me give an example from my own experience. I was writing code which
> was using the kernel RB trees, and I was trying to be strict and use
> 'const' whenever possible. But because the core functions like 'rb_next'
> do not have 'const' modifier, I could not use const in many many places
> of my code, because gcc was yelling. And I was not very enthusiastic to
> touch the RB-tree code that time.
The problem is that you end up with two sets of functions (one taking const
another taking non-const), a bunch of macros or a function that takes const
but returns non-const. If we settle on anything I would probably vote for
the last option but the all are far from ideal.
--
Best regards, _ _
.o. | Liege of Serenely Enlightened Majesty of o' \,=./ `o
..o | Computer Science, Michal "mina86" Nazarewicz (o o)
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next prev parent reply other threads:[~2011-04-20 11:20 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-15 9:56 Phil Carmody
2011-04-15 9:56 ` [PATCH] mm: make read-only accessors take const parameters Phil Carmody
2011-04-15 14:51 ` Christoph Lameter
2011-04-15 16:07 ` Phil Carmody
2011-04-20 11:45 ` Artem Bityutskiy
2011-04-16 23:48 ` David Rientjes
2011-04-15 14:51 ` [PATCH 0/1] mm: make read-only accessors take const pointer parameters Andrea Arcangeli
2011-04-15 15:59 ` Phil Carmody
2011-04-15 16:09 ` Andrea Arcangeli
2011-04-20 9:28 ` Artem Bityutskiy
2011-04-20 11:20 ` Michal Nazarewicz [this message]
2011-04-20 11:44 ` Artem Bityutskiy
2011-04-15 16:12 ` Michal Nazarewicz
2011-04-15 16:28 ` Phil Carmody
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