All of lore.kernel.org
 help / color / mirror / Atom feed
From: Corey Minyard <minyard@acm.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org, openipmi-developer@lists.sourceforge.net
Subject: Re: [PATCH 7/8] IPMI: convert locked counters to atomics
Date: Wed, 13 Feb 2008 18:19:02 -0600	[thread overview]
Message-ID: <47B388F6.8040202@acm.org> (raw)
In-Reply-To: <20080213152645.9e589d0c.akpm@linux-foundation.org>

Andrew Morton wrote:
> The code forgot to initialise all of these.
>
> It just so happens that the all-bits-zero pattern works correctly for all
> current architectures, so the code should work OK.  But there is no reason
> (I hope) why an architecture cannot implement atomic_t as
>
> struct atomic_t {
> 	int counter;
> 	spinlock_t lock;
> };
>
> in which case the results of ATOMIC_INIT() may _not_ be all-zeroes, in
> which case the code will deadlock.
>
> So.  It works, but it's grubby.   Do you still wish to proceed?
>   
Thanks.  Don't proceed for now, I'll work up new patches.

-corey


      reply	other threads:[~2008-02-14  0:19 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-13 16:32 [PATCH 7/8] IPMI: convert locked counters to atomics Corey Minyard
2008-02-13 23:26 ` Andrew Morton
2008-02-14  0:19   ` Corey Minyard [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=47B388F6.8040202@acm.org \
    --to=minyard@acm.org \
    --cc=akpm@linux-foundation.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=openipmi-developer@lists.sourceforge.net \
    /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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.