linux-kernel - Re: [RFC 1/7] Remove declaration of sighand

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Message-Id: <20061121000743.bb9ea2d0.akpm@osdl.org>
Date:	Tue, 21 Nov 2006 00:07:43 -0800
From:	Andrew Morton <akpm@...l.org>
To:	Christoph Lameter <clameter@....com>
Cc:	Stephen Rothwell <sfr@...b.auug.org.au>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	Pekka Enberg <penberg@...helsinki.fi>,
	Manfred Spraul <manfred@...orfullife.com>
Subject: Re: [RFC 1/7] Remove declaration of sighand_cachep from slab.h

On Mon, 20 Nov 2006 08:20:13 -0800 (PST)
Christoph Lameter <clameter@....com> wrote:

> On Sat, 18 Nov 2006, Stephen Rothwell wrote:
> 
> > Is there no suitable header file to put this in?
> 
> There is only a single file that uses sighand_cachep apart from where it 
> was defined. If we would add it to signal.h then we would also have to
> add an include for slab.h just for this statement.

That's one of the reasons why typedefs are bad.

Use `struct kmem_cache' instead of `kmem_cache_t' and lo, you can
forward-declare it in the header file without having to include slab.h.

Patches which rid us of kmem_cache_t are always welcome..
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