LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Christoph Lameter <cl@linux.com>
To: Jan Beulich <JBeulich@novell.com>
Cc: tj@kernel.org, mingo@elte.hu, tglx@linutronix.de,
	linux-kernel@vger.kernel.org, hpa@zytor.com
Subject: Re: x86: mis-named percpu_xchg_op() after switch to cmpxchg?
Date: Mon, 7 Feb 2011 11:17:25 -0600 (CST)	[thread overview]
Message-ID: <alpine.DEB.2.00.1102071115070.3911@router.home> (raw)
In-Reply-To: <4D4FDF050200007800030883@vpn.id2.novell.com>

On Mon, 7 Feb 2011, Jan Beulich wrote:

> Other than its name implies, with the switch to use cmpxchg instead of
> xchg (commit 8270137a0d50507a5b40f880db636527045b8466) this
> macro is no longer suitable for accessing anything that may be written
> by other than the local CPU (i.e. anything but the various this_cpu
> accessors). Shouldn't it therefore get renamed to eg this_cpu_xchg_op()?

No. The intend of the percpu_xchg_op was also to provide local cpu only
semantics. percpu_xx operations in general have the same semantics as
this_cpu operations.


      reply	other threads:[~2011-02-07 17:17 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-02-07 11:01 Jan Beulich
2011-02-07 17:17 ` Christoph Lameter [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=alpine.DEB.2.00.1102071115070.3911@router.home \
    --to=cl@linux.com \
    --cc=JBeulich@novell.com \
    --cc=hpa@zytor.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mingo@elte.hu \
    --cc=tglx@linutronix.de \
    --cc=tj@kernel.org \
    --subject='Re: x86: mis-named percpu_xchg_op() after switch to cmpxchg?' \
    /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).