The patch titled drivers/scsi/53c700.c: remove dma_is_consistent usage has been added to the -mm tree. Its filename is drivers-scsi-53c700c-remove-dma_is_consistent-usage.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find out what to do about this The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/ ------------------------------------------------------ Subject: drivers/scsi/53c700.c: remove dma_is_consistent usage From: FUJITA Tomonori <fujita.tomonori@xxxxxxxxxxxxx> 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 explained that this is necessary 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 coherence stride is greater than the L1 cache size. 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. Signed-off-by: FUJITA Tomonori <fujita.tomonori@xxxxxxxxxxxxx> Cc: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> Cc: James Bottomley <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx> Cc: <linux-arch@xxxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- drivers/scsi/53c700.c | 3 --- 1 file changed, 3 deletions(-) diff -puN drivers/scsi/53c700.c~drivers-scsi-53c700c-remove-dma_is_consistent-usage drivers/scsi/53c700.c --- a/drivers/scsi/53c700.c~drivers-scsi-53c700c-remove-dma_is_consistent-usage +++ a/drivers/scsi/53c700.c @@ -309,9 +309,6 @@ NCR_700_detect(struct scsi_host_template hostdata->msgin = memory + MSGIN_OFFSET; hostdata->msgout = memory + MSGOUT_OFFSET; hostdata->status = memory + STATUS_OFFSET; - /* all of these offsets are L1_CACHE_BYTES separated. It is fatal - * if this isn't sufficient separation to avoid dma flushing issues */ - BUG_ON(!dma_is_consistent(hostdata->dev, pScript) && L1_CACHE_BYTES < dma_get_cache_alignment()); hostdata->slots = (struct NCR_700_command_slot *)(memory + SLOTS_OFFSET); hostdata->dev = dev; _ Patches currently in -mm which might be from fujita.tomonori@xxxxxxxxxxxxx are linux-next.patch scsi-add-__init-__exit-macros-to-ibmvstgtc.patch dma-mapping-rename-arch_kmalloc_minalign-to-arch_dma_minalign.patch dma-mapping-unify-dma_get_cache_alignment-implementations.patch dma-mapping-parisc-set-arch_dma_minalign.patch drivers-scsi-53c700c-remove-dma_is_consistent-usage.patch dma-mapping-remove-dma_is_consistent-api.patch -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html