[Merge note: this patch will be in a SCSI patchkit and in the core
mask allocator patchkit. They are equivalent. If one of them
is merged first simply drop it in the other]
Converts the queue bounce_pfn to a DMA mask suitable for the mask allocator
Signed-off-by: Andi Kleen <ak@xxxxxxx>
Signed-off-by: Andi Kleen <andi@xxxxxxxxxxxxxx>
Signed-off-by: Andi Kleen <ak@xxxxxxxxxxxxxxx>
---
include/linux/blkdev.h | 5 +++++
1 file changed, 5 insertions(+)
Index: linux/include/linux/blkdev.h
===================================================================
--- linux.orig/include/linux/blkdev.h 2008-11-15 22:37:12.000000000 +0100
+++ linux/include/linux/blkdev.h 2008-11-15 22:37:12.000000000 +0100
@@ -966,6 +966,11 @@
return bdev->bd_block_size;
}
+static inline u64 blk_q_mask(struct request_queue *q)
+{
+ return ~(-1LL << (PAGE_SHIFT + fls64(q->bounce_pfn)));
+}
+
typedef struct {struct page *v;} Sector;
unsigned char *read_dev_sector(struct block_device *, sector_t, Sector *);
--
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