LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Andi Kleen <ak@muc.de>
To: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>,
	Arjan van de Ven <arjan@infradead.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: -freg-struct-return?
Date: 22 Feb 2007 19:36:28 +0100	[thread overview]
Date: Thu, 22 Feb 2007 19:36:28 +0100	[thread overview]
Message-ID: <20070222183628.GA65601@muc.de> (raw)
In-Reply-To: <45DDD538.1040309@goop.org>

On Thu, Feb 22, 2007 at 09:39:04AM -0800, Jeremy Fitzhardinge wrote:
> H. Peter Anvin wrote:
> > Sometimes returning small structures is really nice.  If you can pass
> > them in registers, it's often generates the fastest possible code;
> > much better than using a pointer. 
> 
> Yes, but specifically, are there any pieces of assembler which return
> structures?  It appears there are none (since Ingo got a booting
> kernel), but there might be something obscure in some corner.

When I did the x86-64 port I went over all assembler and I can't remember
anything that did that. Of course there might be out of tree drivers
that do, but they just have to fix it up.

BTW would it make sense to have a special announcement list for such changes?

-Andi

  reply	other threads:[~2007-02-22 18:36 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-02-22  1:28 -freg-struct-return? Jeremy Fitzhardinge
2007-02-22  8:04 ` -freg-struct-return? Arjan van de Ven
2007-02-22  8:09   ` -freg-struct-return? Jeremy Fitzhardinge
2007-02-22  8:15     ` -freg-struct-return? Arjan van de Ven
2007-02-22  8:30       ` -freg-struct-return? Jeremy Fitzhardinge
2007-02-22  8:37       ` -freg-struct-return? Ingo Molnar
2007-02-22  8:38     ` [patch] x86: add -freg-struct-return to CFLAGS Ingo Molnar
2007-02-22 11:23       ` Andi Kleen
2007-02-22 11:27         ` Arjan van de Ven
2007-02-22 18:35       ` Adrian Bunk
2007-02-22 22:31         ` H. Peter Anvin
2007-02-22  9:50     ` -freg-struct-return? Jakub Jelinek
2007-02-22 11:22     ` -freg-struct-return? Andi Kleen
2007-02-22 16:42       ` -freg-struct-return? H. Peter Anvin
2007-02-22 17:39         ` -freg-struct-return? Jeremy Fitzhardinge
2007-02-22 18:36           ` Andi Kleen [this message]
2007-02-22 18:48             ` -freg-struct-return? H. Peter Anvin
2007-02-23  0:21               ` -freg-struct-return? Andi Kleen
2007-02-22 18:56             ` -freg-struct-return? Jan Engelhardt
2007-02-22 19:12               ` -freg-struct-return? H. Peter Anvin

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20070222183628.GA65601@muc.de \
    --to=ak@muc.de \
    --cc=arjan@infradead.org \
    --cc=hpa@zytor.com \
    --cc=jeremy@goop.org \
    --cc=linux-kernel@vger.kernel.org \
    --subject='Re: -freg-struct-return?' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).