mirror of https://lore.kernel.org/lkml/
 help / color / mirror / Atom feed
From: Ingo Molnar <mingo@elte.hu>
To: Dave Anderson <anderson@redhat.com>, Andy Lutomirski <luto@mit.edu>
Cc: linux-kernel@vger.kernel.org, andi@firstfloor.org,
	jstancek@redhat.com, Thomas Gleixner <tglx@linutronix.de>,
	"H. Peter Anvin" <hpa@zytor.com>
Subject: Re: [PATCH] x86-64: Prevent gcc from optimizing away venosys_1()
Date: Mon, 6 Jun 2011 19:22:09 +0200	[thread overview]
Message-ID: <20110606172209.GH2391@elte.hu> (raw)
In-Reply-To: <2060873692.1232.1307114423575.JavaMail.root@zmail05.collab.prod.int.phx2.redhat.com>


* Dave Anderson <anderson@redhat.com> wrote:

> One of the changes in commit a4928cffe6435caf427ae673131a633c1329dbf3 
> made the venosys_1() system call static, which causes it to be 
> optimized out of the kernel:
> 
>   Author: Ingo Molnar <mingo@elte.hu>
>   Date:   Wed Apr 23 13:20:56 2008 +0200
> 
>   "make namespacecheck" fixes
> 
>   Signed-off-by: Ingo Molnar <mingo@elte.hu>

Andy noticed this recently, so we got rid of that broken (and unused) 
syscall in:

  bb5fe2f78ead: x86-64: Remove vsyscall number 3 (venosys)

which is in the tip:x86/vdso branch at:

   http://people.redhat.com/mingo/tip.git/README

Thanks,

	Ingo

      parent reply	other threads:[~2011-06-06 17:22 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <313387488.1201.1307114323524.JavaMail.root@zmail05.collab.prod.int.phx2.redhat.com>
2011-06-03 15:20 ` Dave Anderson
2011-06-03 20:48   ` Andi Kleen
2011-06-03 21:32     ` Dave Anderson
2011-06-03 21:37       ` Andi Kleen
2011-06-06 17:22   ` Ingo Molnar [this message]

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=20110606172209.GH2391@elte.hu \
    --to=mingo@elte.hu \
    --cc=anderson@redhat.com \
    --cc=andi@firstfloor.org \
    --cc=hpa@zytor.com \
    --cc=jstancek@redhat.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=luto@mit.edu \
    --cc=tglx@linutronix.de \
    /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
all inboxes | Powered by JetHome®