From: Ollie Lho <ollie@sis.com.tw>
To: David Woodhouse <dwmw2@infradead.org>
Cc: mtd@infradead.org
Subject: Re: MTD CVS update: 'mtd/kernel doc2001.c'
Date: Wed, 25 Oct 2000 18:01:13 +0800 [thread overview]
Message-ID: <39F6AF69.100AC50E@sis.com.tw> (raw)
In-Reply-To: 18954.972464502@redhat.com
David Woodhouse wrote:
>
> ollie@infradead.org said:
> > Log Message:
> > use memcpy_(from|to)_io to increase perfromance a little bit
>
> Here be dragons.
>
> Beware that this doesn't start trying to do 32-bit accesses, where the top
> three bytes are random, and that it doesn't break the ECC.
>
> Probably worth setting USE_MEMCPY in include/linux/mtd/doc2000.h in with
> all the other arch-dependent stuff to set up ReadDOC etc.
>
Oops, sorry. I just copy it from the dis-asm of M-Systems' driver.
USE_MEMCPY should be protected by #ifdef 386 stuff.
Ollie
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next prev parent reply other threads:[~2000-10-25 10:02 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <E13oMJV-0003oY-00@infradead.org>
2000-10-25 9:01 ` MTD CVS update: 'mtd/kernel doc2001.c' David Woodhouse
2000-10-25 10:01 ` Ollie Lho [this message]
2000-10-26 6:46 ` Udi Finkelstein
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