From: James Bottomley <James.Bottomley@steeleye.com>
To: "David S. Miller" <davem@redhat.com>
Cc: Andrew Morton <akpm@osdl.org>, Linus Torvalds <torvalds@osdl.org>,
SCSI Mailing List <linux-scsi@vger.kernel.org>,
Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: PATCH] dma_get_required_mask()
Date: 28 Jun 2004 17:40:06 -0500 [thread overview]
Message-ID: <1088462407.2003.54.camel@mulgrave> (raw)
In-Reply-To: <20040628152839.23178136.davem@redhat.com>
On Mon, 2004-06-28 at 17:28, David S. Miller wrote:
> Maybe you should tweak the default implementation such that
> something reasonable happens on 64-bit platforms that
> define dma_addr_t as a 32-bit quantity. :-)
Actually, the default implementation should work on these platforms
too. Since it's impossible to set a mask over 32 bits, then the best
dma_get_required_mask() will do is return a full spread of 32 bits,
since the memory mask is anded with the current dma mask.
James
next prev parent reply other threads:[~2004-06-28 22:40 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-06-28 21:10 PATCH] dma_get_required_mask() James Bottomley
2004-06-28 22:28 ` David S. Miller
2004-06-28 22:40 ` James Bottomley [this message]
2004-06-28 22:39 ` David S. Miller
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