From: FUJITA Tomonori Date: Wed, 11 Aug 2010 01:03:24 +0000 (-0700) Subject: scsi: 53c700: remove dma_is_consistent usage X-Git-Tag: v2.6.36-rc1~122 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d80e0d96a328cc864a1cb359f545a6ed0c61812d;p=pandora-kernel.git scsi: 53c700: remove dma_is_consistent usage This driver is the only user of dma_is_consistent(). We plan to remove this API. The driver uses the API in the following way: BUG_ON(!dma_is_consistent(hostdata->dev, pScript) && L1_CACHE_BYTES < dma_get_cache_alignment()); The above code tries to see if L1_CACHE_BYTES is greater than dma_get_cache_alignment() on sysmtes that can not allocate coherent memory (some old systems can't). James Bottomley exmplained that this is necesary because the driver packs the set of mailboxes into a single coherent area and separates the different usages by a L1 cache stride. So it's fatal if the dma He also pointed out that we can kill this checking because we don't hit this BUG_ON on all architectures that actually use the driver. (akpm: stolen from the scsi tree because dma-mapping-remove-dma_is_consistent-api.patch needs it) Signed-off-by: FUJITA Tomonori Signed-off-by: James Bottomley Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- Reading git-diff-tree failed