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: Thu, 08 Jan 2015 14:25:57 -0800 [thread overview]
Message-ID: <54AF03F5.9030907@gmail.com> (raw)
In-Reply-To: <20150108221356.GD12302@n2100.arm.linux.org.uk>
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?
--
Florian
next prev parent reply other threads:[~2015-01-08 22:25 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 [this message]
2015-01-09 16:16 ` Russell King - ARM Linux
2015-01-09 18:35 ` Florian Fainelli
2015-01-08 22:11 ` Gregory Fong
2015-01-09 17:57 ` Rabin Vincent
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