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Date: Sun, 4 Jun 2006 09:20:35 +0100
From: Christoph Hellwig <hch@infradead.org>
To: Tejun Heo <htejun@gmail.com>
Cc: Jens Axboe <axboe@suse.de>, James Bottomley <James.Bottomley@SteelEye.com>,
        Dave Miller <davem@redhat.com>, bzolnier@gmail.com,
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        linux-ide@vger.kernel.org, linux-scsi@vger.kernel.org
Subject: Re: [PATCH 4/5] SCSI: add cpu cache flushes after kmapping and modifying a page
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On Sun, Jun 04, 2006 at 12:41:20PM +0900, Tejun Heo wrote:
>  			local_irq_save(flags);
>  			buf = kmap_atomic(sg->page, KM_IRQ0) + sg->offset;
>  			memcpy(buf, tw_dev->generic_buffer_virt[request_id], sg->length);
> +			flush_kernel_dcache_page(kmap_atomic_to_page(buf - sg->offset));
>  			kunmap_atomic(buf - sg->offset, KM_IRQ0);
>  			local_irq_restore(flags);

all these should switch to scsi_kmap_atomic_sg which should do the
flush_kernel_dcache_page call for you.