From: "David S. Miller" <davem@redhat.com>
To: James Bottomley <James.Bottomley@SteelEye.com>
Cc: akpm@osdl.org, torvalds@osdl.org, linux-scsi@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: PATCH] dma_get_required_mask()
Date: Mon, 28 Jun 2004 15:39:41 -0700 [thread overview]
Message-ID: <20040628153941.1317d9bf.davem@redhat.com> (raw)
In-Reply-To: <1088462407.2003.54.camel@mulgrave>
On 28 Jun 2004 17:40:06 -0500
James Bottomley <James.Bottomley@SteelEye.com> wrote:
> 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.
Perfect, I didn't notice that.
prev parent reply other threads:[~2004-06-28 22:41 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
2004-06-28 22:39 ` David S. Miller [this message]
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