From: Chris Wedgwood <cw@f00f.org>
To: Kaigai Kohei <kaigai@ak.jp.nec.com>
Cc: akpm@osdl.org, hugh@veritas.com, ak@muc.de, wli@holomorphy.com,
takata.hirokazu@renesas.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] atomic_inc_return() for i386[1/5] (Re: atomic_inc_return)
Date: Thu, 9 Sep 2004 22:34:24 -0700 [thread overview]
Message-ID: <20040910053424.GA3668@taniwha.stupidest.org> (raw)
In-Reply-To: <200409100326.i8A3QsYV007096@mailsv.bs1.fc.nec.co.jp>
On Fri, Sep 10, 2004 at 12:26:54PM +0900, Kaigai Kohei wrote:
> +static __inline__ int atomic_add_return(int i, atomic_t *v)
> +{
> + int __i;
> +#ifdef CONFIG_M386
> + if(unlikely(boot_cpu_data.x86==3))
> + goto no_xadd;
> +#endif
i didn't check what code is generated, but isn't that expensive? i
guess most people building i386 kernels want maximum compatability so
it probably doesn't matter...
next prev parent reply other threads:[~2004-09-10 5:41 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <Pine.LNX.4.44.0409092005430.14004-100000@localhost.localdomain>
2004-09-10 3:26 ` Kaigai Kohei
2004-09-10 5:34 ` Chris Wedgwood [this message]
2004-09-11 23:05 ` Andrew Morton
2004-09-12 8:25 ` Andi Kleen
2004-09-12 9:06 ` Andrew Morton
2004-09-10 3:27 ` [PATCH] atomic_inc_return() for x86_64[2/5] " Kaigai Kohei
2004-09-10 3:29 ` [PATCH] atomic_inc_return() for arm[3/5] " Kaigai Kohei
2004-09-10 3:30 ` [PATCH] atomic_inc_return() for arm26[1/5] " Kaigai Kohei
2004-09-10 3:32 ` [PATCH] atomic_inc_return() for sparc64[5/5] " Kaigai Kohei
2004-09-10 5:26 ` David S. Miller
2004-09-10 4:05 ` PATCH] atomic_inc_return() [0/5] " Kaigai Kohei
2004-09-10 6:37 ` Hugh Dickins
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