From: mail@pawelmoll.com (Pawel Moll)
To: linux-arm-kernel@lists.infradead.org
Subject: [RFC] mmaping with VIVT cache
Date: Mon, 20 Sep 2010 11:38:44 +0100 [thread overview]
Message-ID: <a4e3b92bbd5f9f04fa06dd5d3f2f160a@cox.rootnode.net> (raw)
In-Reply-To: <20100917210649.GA18343@n2100.arm.linux.org.uk>
> However, in this case, architectures using VIPT aliasing caches will
> also trip over it - has anyone used this webcam on something like
> Sparc or powerpc? I'm guessing that it'll fail there too...
It wasn't a webcam but USB audio card, not sparc nor powerpc but sh but
the I believe problem stays the same - vmalloc-ed buffer mapped into the
user-space...
http://thread.gmane.org/gmane.linux.alsa.devel/55882/focus=7160
I've ended up with pgprot_noncached(), as there was no "alias-safe API"
available, and apparently it's still the case? ;-)
Cheers!
Pawe?
next prev parent reply other threads:[~2010-09-20 10:38 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-17 19:07 [RFC] mmaping with VIVT cache P F
2010-09-17 21:06 ` Russell King - ARM Linux
2010-09-20 10:38 ` Pawel Moll [this message]
2010-09-20 10:50 ` Russell King - ARM Linux
2010-09-20 11:31 ` Pawel Moll
-- strict thread matches above, loose matches on Subject: below --
2010-09-16 0:25 P F
2010-09-16 23:05 ` Russell King - ARM Linux
2010-09-13 19:58 P F
2010-09-14 23:50 ` Russell King - ARM Linux
2010-09-15 1:06 ` Eric Miao
2010-09-15 7:31 ` Russell King - ARM Linux
2010-09-15 7:37 ` Eric Miao
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