From: Richard Henderson <rth@twiddle.net>
To: Linus Torvalds <torvalds@osdl.org>
Cc: Ingo Molnar <mingo@elte.hu>,
Kernel Mailing List <linux-kernel@vger.kernel.org>,
Manfred Spraul <manfred@colorfullife.com>
Subject: Re: out-of-line x86 "put_user()" implementation
Date: Tue, 8 Feb 2005 18:36:37 -0800 [thread overview]
Message-ID: <20050209023637.GB13911@twiddle.net> (raw)
In-Reply-To: <Pine.LNX.4.58.0502081808410.2165@ppc970.osdl.org>
On Tue, Feb 08, 2005 at 06:16:15PM -0800, Linus Torvalds wrote:
> I'd happily use your version, but I thought that some versions of gcc
> require that input output registers cannot overlap, and would refuse to do
> that thing? But if you tell me differently..
No, you're thinking of
asm("" : "=a" (x) : : "eax")
where the clobber overlaps the inputs or outputs.
r~
next prev parent reply other threads:[~2005-02-09 2:38 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-02-07 6:23 out-of-line x86 "put_user()" implementation Linus Torvalds
2005-02-07 11:44 ` Ingo Molnar
2005-02-08 1:20 ` Linus Torvalds
2005-02-08 17:43 ` Pavel Machek
2005-02-08 19:35 ` Valdis.Kletnieks
2005-02-09 1:25 ` Richard Henderson
2005-02-09 2:08 ` Linus Torvalds
2005-02-09 2:24 ` Andrew Morton
2005-02-09 2:32 ` Linus Torvalds
2005-02-09 1:27 ` Richard Henderson
2005-02-09 2:16 ` Linus Torvalds
2005-02-09 2:27 ` Linus Torvalds
2005-02-09 2:33 ` Richard Henderson
2005-02-11 22:15 ` H. Peter Anvin
2005-02-09 2:36 ` Richard Henderson [this message]
2005-03-12 14:55 ` Coywolf Qi Hunt
2005-02-12 1:55 Chuck Ebbert
2005-02-12 2:03 ` Linus Torvalds
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