From: f.fainelli@gmail•com (Florian Fainelli)
To: linux-arm-kernel@lists•infradead.org
Subject: [RFC] ARM: Make CPU_DCACHE_DISABLE depend on !SMP
Date: Fri, 09 Jan 2015 10:35:33 -0800 [thread overview]
Message-ID: <54B01F75.8020604@gmail.com> (raw)
In-Reply-To: <20150109161624.GR12302@n2100.arm.linux.org.uk>
On 09/01/15 08:16, Russell King - ARM Linux wrote:
> On Thu, Jan 08, 2015 at 02:25:57PM -0800, Florian Fainelli wrote:
>> On 08/01/15 14:13, Russell King - ARM Linux wrote:
>>> On Thu, Jan 08, 2015 at 11:10:47PM +0100, Arnd Bergmann wrote:
>>>> My guess is that any implementation that has working LDREX/STREX
>>>> on uncached memory does not support SMP, because these instructions
>>>> tend to be implemented through the cache coherency logic on SMP
>>>> systems but could be implemented more easily without a dcache
>>>> on uniprocessor cores.
>>>
>>> Yes, I negated Tony's patches... Tony was fixing pstore to use
>>> writecombine memory.
>>>
>>> So this change is fine.
>>
>> Do you want me to submit the patch as-is to your patch tracking, or
>> would you want to include Gregory's quotes for completeness?
>
> I think as-is.
Thanks, submitted as 8276/1.
--
Florian
next prev parent reply other threads:[~2015-01-09 18:35 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-08 2:11 [RFC] ARM: Make CPU_DCACHE_DISABLE depend on !SMP Florian Fainelli
2015-01-08 8:33 ` Arnd Bergmann
2015-01-08 11:52 ` Russell King - ARM Linux
2015-01-08 15:53 ` Florian Fainelli
2015-01-08 21:54 ` Gregory Fong
2015-01-08 22:10 ` Arnd Bergmann
2015-01-08 22:13 ` Russell King - ARM Linux
2015-01-08 22:25 ` Florian Fainelli
2015-01-09 16:16 ` Russell King - ARM Linux
2015-01-09 18:35 ` Florian Fainelli [this message]
2015-01-08 22:11 ` Gregory Fong
2015-01-09 17:57 ` Rabin Vincent
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