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Date: Wed, 25 Sep 2002 09:34:30 +0200
From: Jens Axboe <axboe@suse.de>
To: Luben Tuikov <luben@splentec.com>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: struct page question
Message-ID: <20020925073430.GG15479@suse.de>
References: <3D90D4AB.B0BDF702@splentec.com>
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On Tue, Sep 24 2002, Luben Tuikov wrote:
> Is it possible to build a struct page *page, where
> page_address(page) == some virtual address (not high mem of course)?
> 
> The reason I want to do this is so that I can pass it to
> generic_make_request(), having only a pointer to a buffer
> and size to a buffer, and the fact that not all devices
> have request_fn() exposed (e.g. md).
> 
> Apparently I cannot just set b_data and b_size, b_page
> also has to be set and it also seems that it will
> not work if page_address(b_page) != b_data...

bh->b_page = virt_to_page(va);
bh->b_data = va;

-- 
Jens Axboe

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