From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
To: Arnd Bergmann <arnd@arndb.de>
Cc: Peter Fritzsche <peter.fritzsche@gmx.de>,
Ingo Molnar <mingo@elte.hu>,
Andrew Morton <akpm@linux-foundation.org>,
Heiko Carstens <heiko.carstens@de.ibm.com>,
linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org,
Keith M Wesolowski <wesolows@foobazco.org>,
Martin Schwidefsky <schwidefsky@de.ibm.com>
Subject: Re: [PATCH 2/2] asm-generic: Don't warn that atomic_t is only 24 bit
Date: Wed, 28 Apr 2010 09:54:34 -0400 [thread overview]
Message-ID: <20100428135434.GA4662@Krystal> (raw)
In-Reply-To: <201004281533.29327.arnd@arndb.de>
* Arnd Bergmann (arnd@arndb.de) wrote:
> On Wednesday 28 April 2010, Peter Fritzsche wrote:
> > 32-bit Sparc used to only allow usage of 24-bit of it's atomic_t type.
> > This was corrected with linux 2.6.3 when Keith M Wesolowski changed the
> > implementation to use the parisc approach of having an array of
> > spinlocks to protect the atomic_t.
> >
> > These warnings were also removed from the sparc implementation when the
> > new implementation was merged in BKrev:402e4949VThdc6D3iaosSFUgabMfvw,
> > but the warning still remained in some other places without any
> > 24-bit-only atomic_t implementation inside the kernel.
> >
> > We should remove these warnings to allow users to rely on the full
> > 32-bit range of atomic_t.
> >
> > Signed-off-by: Peter Fritzsche <peter.fritzsche@gmx.de>
>
> Acked-by: Arnd Bergmann <arnd@arndb.de>
AFAIK that was the last architecture imposing limitations below 32 bits
on atomic_t.
Acked-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
--
Mathieu Desnoyers
Operating System Efficiency R&D Consultant
EfficiOS Inc.
http://www.efficios.com
next prev parent reply other threads:[~2010-04-28 13:54 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1272451837-17961-1-git-send-email-peter.fritzsche@gmx.de>
2010-04-28 11:10 ` [PATCH 2/2] asm-generic: Don't warn that atomic_t is only 24 bit Peter Fritzsche
2010-04-28 11:10 ` Peter Fritzsche
2010-04-28 13:33 ` Arnd Bergmann
2010-04-28 13:54 ` Mathieu Desnoyers [this message]
2010-04-28 13:54 ` Mathieu Desnoyers
2010-04-28 15:28 ` Jamie Lokier
2010-04-28 16:27 ` Mathieu Desnoyers
2010-04-28 18:42 ` Peter Fritzsche
2010-04-28 18:42 ` Peter Fritzsche
2010-04-29 16:22 ` David Howells
2010-04-29 21:10 ` Mathieu Desnoyers
2010-04-29 21:10 ` Mathieu Desnoyers
2010-04-30 8:53 ` Peter Fritzsche
2010-04-28 16:46 ` David Miller
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