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From: Ingo Molnar <mingo@elte.hu>
To: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: user-mode-linux-devel@lists.sourceforge.net,
	Jeff Dike <jdike@addtoit.com>,
	Paolo Giarrusso <p.giarrusso@gmail.com>,
	linux-kernel@vger.kernel.org, Nix <nix@esperi.org.uk>,
	Andi Kleen <andi@firstfloor.org>, Rob Landley <rob@landley.net>,
	Al Viro <viro@ftp.linux.org.uk>,
	WANG Cong <xiyou.wangcong@gmail.com>,
	Sam Ravnborg <sam@ravnborg.org>
Subject: Re: [uml-devel] User Mode Linux still doesn't build in 2.6.23-final.
Date: Tue, 23 Oct 2007 16:47:10 +0200	[thread overview]
Message-ID: <20071023144710.GA13785@elte.hu> (raw)
In-Reply-To: <471E05C0.4010005@goop.org>


* Jeremy Fitzhardinge <jeremy@goop.org> wrote:

> Ingo Molnar wrote:
> > * Andi Kleen <andi@firstfloor.org> wrote:
> >
> >   
> >>>> You should rename it then to "asmcall" or something.
> >>>>         
> >>> if then that should be a separate renaming patch.
> >>>       
> >> Well you're asking for the ugly hacks for out of tree code.  [...]
> >>     
> >
> > nice word-bending there. I'm asking for pre-existing annotations to 
> > survive. It hurts you _nothing_ and it was a world of pain for us to 
> > recover those lost annotations. Anyway, if Jeremy does not object to the 
> > patch
> 
> I don't have any objections to the idea of the patch, but I'm still 
> concerned about the practical aspects of it.  Maintaining these kinds 
> of annotations is hard/fragile/etc when the compiler doesn't warn when 
> you get it wrong, and only a very specific use-case will reveal the 
> problem (and do so in a fairly obscure way).

it wont be any different from the situation before - we had no such 
warnings there either. Anyway, this shouldnt really bother you as at the 
moment it's only used for -rt. The issue is to keep something we had 
before (but which was stupidly/carelessly removed). If it breaks we'll 
fix it up.

> > we'll push it in and then rename fastcall to asmcall. Much ado about 
> > nothing.
> 
> Hm, "asmcall" is confusingly close to "asmlinkage" - and they have 
> exactly the same intent (can be called from asm), but with exactly the 
> opposite effect.  How about something which actually says what we 
> mean. How about just "regparm"?

yeah, regparm is fine.

	Ingo

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WARNING: multiple messages have this Message-ID (diff)
From: Ingo Molnar <mingo@elte.hu>
To: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Andi Kleen <andi@firstfloor.org>, Al Viro <viro@ftp.linux.org.uk>,
	WANG Cong <xiyou.wangcong@gmail.com>,
	Sam Ravnborg <sam@ravnborg.org>, Nix <nix@esperi.org.uk>,
	Jeff Dike <jdike@addtoit.com>,
	Paolo Giarrusso <p.giarrusso@gmail.com>,
	user-mode-linux-devel@lists.sourceforge.net,
	linux-kernel@vger.kernel.org, Rob Landley <rob@landley.net>
Subject: Re: [uml-devel] User Mode Linux still doesn't build in 2.6.23-final.
Date: Tue, 23 Oct 2007 16:47:10 +0200	[thread overview]
Message-ID: <20071023144710.GA13785@elte.hu> (raw)
In-Reply-To: <471E05C0.4010005@goop.org>


* Jeremy Fitzhardinge <jeremy@goop.org> wrote:

> Ingo Molnar wrote:
> > * Andi Kleen <andi@firstfloor.org> wrote:
> >
> >   
> >>>> You should rename it then to "asmcall" or something.
> >>>>         
> >>> if then that should be a separate renaming patch.
> >>>       
> >> Well you're asking for the ugly hacks for out of tree code.  [...]
> >>     
> >
> > nice word-bending there. I'm asking for pre-existing annotations to 
> > survive. It hurts you _nothing_ and it was a world of pain for us to 
> > recover those lost annotations. Anyway, if Jeremy does not object to the 
> > patch
> 
> I don't have any objections to the idea of the patch, but I'm still 
> concerned about the practical aspects of it.  Maintaining these kinds 
> of annotations is hard/fragile/etc when the compiler doesn't warn when 
> you get it wrong, and only a very specific use-case will reveal the 
> problem (and do so in a fairly obscure way).

it wont be any different from the situation before - we had no such 
warnings there either. Anyway, this shouldnt really bother you as at the 
moment it's only used for -rt. The issue is to keep something we had 
before (but which was stupidly/carelessly removed). If it breaks we'll 
fix it up.

> > we'll push it in and then rename fastcall to asmcall. Much ado about 
> > nothing.
> 
> Hm, "asmcall" is confusingly close to "asmlinkage" - and they have 
> exactly the same intent (can be called from asm), but with exactly the 
> opposite effect.  How about something which actually says what we 
> mean. How about just "regparm"?

yeah, regparm is fine.

	Ingo

  reply	other threads:[~2007-10-23 14:47 UTC|newest]

Thread overview: 96+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-10-11 22:54 [uml-devel] User Mode Linux still doesn't build in 2.6.23-final Rob Landley
2007-10-11 22:54 ` Rob Landley
2007-10-20  0:52 ` [uml-devel] " Paolo Giarrusso
2007-10-20  0:52   ` Paolo Giarrusso
2007-10-20 11:41   ` Nix
2007-10-20 11:41     ` Nix
2007-10-21 11:48     ` WANG Cong
2007-10-21 11:48       ` WANG Cong
2007-10-21 13:08       ` Jeff Dike
2007-10-21 13:08         ` Jeff Dike
2007-10-21 13:20         ` WANG Cong
2007-10-21 13:20           ` WANG Cong
2007-10-21 15:43           ` Al Viro
2007-10-21 15:43             ` Al Viro
2007-10-22  4:37             ` WANG Cong
2007-10-22  4:37               ` WANG Cong
2007-10-22  5:22               ` Al Viro
2007-10-22  5:22                 ` Al Viro
2007-10-22  6:12                 ` WANG Cong
2007-10-22  6:12                   ` WANG Cong
2007-10-22  6:42                   ` Nix
2007-10-22  6:42                     ` Nix
2007-10-22  6:52                     ` WANG Cong
2007-10-22  6:52                       ` WANG Cong
2007-10-22  6:59                       ` Sam Ravnborg
2007-10-22  6:59                         ` Sam Ravnborg
2007-10-22  7:48                         ` WANG Cong
2007-10-22  7:48                           ` WANG Cong
2007-10-22  7:58                           ` Robert P. J. Day
2007-10-22  7:58                             ` Robert P. J. Day
2007-10-22 11:36                           ` Al Viro
2007-10-22 11:36                             ` Al Viro
2007-10-22 12:25                             ` WANG Cong
2007-10-22 12:25                               ` WANG Cong
2007-10-22 12:30                               ` Ingo Molnar
2007-10-22 12:30                                 ` Ingo Molnar
2007-10-22 12:39                                 ` WANG Cong
2007-10-22 12:39                                   ` WANG Cong
2007-10-22 12:43                               ` Al Viro
2007-10-22 12:43                                 ` Al Viro
2007-10-22 12:45                                 ` Ingo Molnar
2007-10-22 12:45                                   ` Ingo Molnar
2007-10-22 23:14                                   ` Jeremy Fitzhardinge
2007-10-22 23:14                                     ` Jeremy Fitzhardinge
2007-10-22 23:19                                     ` Ingo Molnar
2007-10-22 23:19                                       ` Ingo Molnar
2007-10-22 23:26                                       ` Jeremy Fitzhardinge
2007-10-22 23:26                                         ` Jeremy Fitzhardinge
2007-10-22 23:56                                       ` Jeremy Fitzhardinge
2007-10-22 23:56                                         ` Jeremy Fitzhardinge
2007-10-23  8:45                                         ` Ingo Molnar
2007-10-23  8:45                                           ` Ingo Molnar
2007-10-23 12:55                                           ` Andi Kleen
2007-10-23 12:55                                             ` Andi Kleen
2007-10-23 13:10                                             ` Ingo Molnar
2007-10-23 13:10                                               ` Ingo Molnar
2007-10-23 14:01                                               ` Andi Kleen
2007-10-23 14:01                                                 ` Andi Kleen
2007-10-23 14:20                                                 ` Ingo Molnar
2007-10-23 14:20                                                   ` Ingo Molnar
2007-10-23 14:31                                                   ` Jeremy Fitzhardinge
2007-10-23 14:31                                                     ` Jeremy Fitzhardinge
2007-10-23 14:47                                                     ` Ingo Molnar [this message]
2007-10-23 14:47                                                       ` Ingo Molnar
2007-10-23 15:11                                                       ` Adrian Bunk
2007-10-23 15:11                                                         ` Adrian Bunk
2007-10-23 14:48                                                   ` Andi Kleen
2007-10-23 14:48                                                     ` Andi Kleen
2007-10-23 15:13                                                     ` Ingo Molnar
2007-10-23 15:13                                                       ` Ingo Molnar
2007-10-23 15:44                                                       ` Ingo Molnar
2007-10-23 15:44                                                         ` Ingo Molnar
2007-10-23 16:57                                                         ` Andi Kleen
2007-10-23 16:57                                                           ` Andi Kleen
2007-10-23 13:25                                           ` Adrian Bunk
2007-10-23 13:25                                             ` Adrian Bunk
2007-10-23 14:20                                           ` Jeremy Fitzhardinge
2007-10-23 14:20                                             ` Jeremy Fitzhardinge
2007-10-22 15:33                                 ` Jeff Dike
2007-10-22 15:33                                   ` Jeff Dike
2007-10-22  7:01                       ` Robert P. J. Day
2007-10-22  7:01                         ` Robert P. J. Day
2007-10-22  7:27                   ` Al Viro
2007-10-22  7:27                     ` Al Viro
2007-10-22 20:24             ` Jeff Dike
2007-10-22 20:24               ` Jeff Dike
2007-10-24 15:22 ` Jeff Dike
2007-10-24 15:22   ` Jeff Dike
2007-10-24 16:14   ` Sam Ravnborg
2007-10-24 16:14     ` Sam Ravnborg
2007-10-24 16:14     ` Sam Ravnborg
2007-10-24 21:46   ` Rob Landley
2007-10-24 21:46     ` Rob Landley
2007-10-25  0:43     ` Jeff Dike
2007-10-25  0:43       ` Jeff Dike
2007-10-25  0:43       ` Jeff Dike

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