From: Andrew Morton <akpm@osdl.org>
To: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Christoph Lameter <clameter@sgi.com>,
linux-mm@kvack.org, Linus Torvalds <torvalds@osdl.org>
Subject: Re: Slab: Remove kmem_cache_t
Date: Tue, 28 Nov 2006 22:24:09 -0800 [thread overview]
Message-ID: <20061128222409.cda8cd5e.akpm@osdl.org> (raw)
In-Reply-To: <456D1D82.3060001@yahoo.com.au>
On Wed, 29 Nov 2006 16:41:22 +1100
Nick Piggin <nickpiggin@yahoo.com.au> wrote:
> Andrew Morton wrote:
> > On Wed, 29 Nov 2006 15:42:44 +1100
> > Nick Piggin <nickpiggin@yahoo.com.au> wrote:
> >
> >
> >>So what exactly is wrong with
> >>a kmem_cache_t declaration in include files, then?
> >
> >
> > a) it's a typedef and
> >
> > b) it's a typedef, and you cannot forward-declare typedefs. We've hit this
> > a couple of times. Header files need to include slab.h just to be able to do
> >
> > extern kmem_cache_t *wozzle;
>
> So why doesn't
>
> typedef struct kmem_cache kmem_cache_t;
> extern kmem_cache_t *wozzle;
>
> work?
>
Well, you'd just do
extern struct kmem_cache *wozzle;
because you "know" that struct kmem_cache == kmem_cache_t. The compiler
will swallow it all.
Do I need to explain how much that sucks?
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next prev parent reply other threads:[~2006-11-29 6:24 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-11-29 2:49 Christoph Lameter
2006-11-29 3:06 ` Andrew Morton
2006-11-29 4:06 ` Nick Piggin
2006-11-29 3:32 ` Christoph Lameter
2006-11-29 4:42 ` Nick Piggin
2006-11-29 3:48 ` Nick Piggin
2006-11-29 4:06 ` Andrew Morton
2006-11-29 4:38 ` Linus Torvalds
2006-11-29 5:51 ` Nick Piggin
2006-11-29 15:48 ` Linus Torvalds
2006-11-30 1:40 ` Nick Piggin
2006-11-30 1:59 ` Linus Torvalds
2006-11-30 2:14 ` Nick Piggin
2006-11-30 2:37 ` Linus Torvalds
2006-11-30 2:51 ` Nick Piggin
2006-11-29 6:21 ` Nick Piggin
2006-11-29 16:11 ` Linus Torvalds
2006-11-29 5:41 ` Nick Piggin
2006-11-29 6:24 ` Andrew Morton [this message]
2006-11-29 6:41 ` Nick Piggin
2006-11-29 7:08 ` Andrew Morton
2006-11-29 7:23 ` Nick Piggin
2006-11-29 7:41 ` Andrew Morton
2006-11-29 8:04 ` Nick Piggin
2006-11-29 16:23 ` Linus Torvalds
2006-11-30 1:44 ` Nick Piggin
2006-11-29 19:16 ` Christoph Lameter
2006-11-29 8:50 ` Peter Zijlstra
2006-11-29 19:27 ` Christoph Lameter
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