From: Jeremy Fitzhardinge <jeremy@goop.org>
To: Al Viro <viro@ftp.linux.org.uk>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
David Miller <davem@davemloft.net>,
hpa@zytor.com, kaos@ocs.com.au, xyzzy@speakeasy.org,
linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org
Subject: Re: [PATCH][RFC] getting rid of stupid loop in BUG()
Date: Wed, 25 Jul 2007 10:36:49 -0700 [thread overview]
Message-ID: <46A78A31.10506@goop.org> (raw)
In-Reply-To: <20070725172542.GG27237@ftp.linux.org.uk>
Al Viro wrote:
> Who said that we need to populate that section from asm? Define
> a static variable in that section inside a block; identifier is
> not a problem, obviously.
>
> I'm not saying that it's not revolting, but it's not impossible.
>
I tried that, but there's still no way of getting a pointer to the ud2a
instruction in there. gcc just generates garbage if you try to use use
the &&label syntax on a label which isn't (potentially) the target of a
goto (it just gets placed somewhere random).
But there's a bigger problem than that. If the BUG is in code which can
be replicated (ie inlined or unrolled), then it would also require
replicating the static variable...
J
next prev parent reply other threads:[~2007-07-25 17:38 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-24 15:39 [PATCH][RFC] getting rid of stupid loop in BUG() Al Viro
2007-07-24 16:56 ` Jeremy Fitzhardinge
2007-07-24 17:03 ` H. Peter Anvin
2007-07-24 17:14 ` Al Viro
2007-07-24 17:28 ` H. Peter Anvin
2007-07-24 18:58 ` Jeremy Fitzhardinge
2007-07-24 19:01 ` H. Peter Anvin
2007-07-24 19:13 ` Jeremy Fitzhardinge
2007-07-24 20:04 ` Al Viro
2007-07-24 21:14 ` Jeremy Fitzhardinge
2007-07-25 2:31 ` Trent Piepho
2007-07-25 2:50 ` Keith Owens
2007-07-25 5:09 ` H. Peter Anvin
2007-07-25 6:24 ` Jeremy Fitzhardinge
2007-07-25 6:29 ` David Miller
2007-07-25 6:50 ` Heiko Carstens
2007-07-25 16:56 ` Linus Torvalds
2007-07-25 17:00 ` Jeremy Fitzhardinge
2007-07-25 17:03 ` H. Peter Anvin
2007-07-25 17:19 ` Linus Torvalds
2007-07-25 17:25 ` Al Viro
2007-07-25 17:36 ` Jeremy Fitzhardinge [this message]
2007-07-25 19:35 ` David Miller
2007-07-25 20:26 ` H. Peter Anvin
2007-07-25 19:28 ` David Miller
2007-07-25 17:19 ` Al Viro
2007-07-25 17:22 ` H. Peter Anvin
2007-07-25 17:26 ` Al Viro
2007-07-25 17:35 ` David Howells
2007-07-25 17:41 ` Jeremy Fitzhardinge
2007-07-25 20:29 ` Chuck Ebbert
2007-07-25 20:37 ` H. Peter Anvin
2007-07-25 22:01 ` David Miller
2007-07-25 18:24 ` Linus Torvalds
2007-07-25 17:36 ` Al Viro
2007-07-25 17:44 ` Jeremy Fitzhardinge
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=46A78A31.10506@goop.org \
--to=jeremy@goop.org \
--cc=davem@davemloft.net \
--cc=hpa@zytor.com \
--cc=kaos@ocs.com.au \
--cc=linux-arch@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=torvalds@linux-foundation.org \
--cc=viro@ftp.linux.org.uk \
--cc=xyzzy@speakeasy.org \
/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
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox