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| author | Ingo Molnar <mingo@elte.hu> | 2009-05-11 09:33:06 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-05-11 09:33:15 +0200 |
| commit | 134cbf35c739bf89c51fd975a33a6b87507482c4 (patch) | |
| tree | c30536dcbb6e99a0f204879bbe5a19bfb27cccf8 /block/blk-settings.c | |
| parent | 2feceeff1e771850e49f9074307f071964fd9e3e (diff) | |
| parent | 091bf7624d1c90cec9e578a18529f615213ff847 (diff) | |
Merge commit 'v2.6.30-rc5' into x86/mm
Merge reason: this branch was on a .30-rc2 base - sync it up with
all the latest fixes.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'block/blk-settings.c')
| -rw-r--r-- | block/blk-settings.c | 20 |
1 files changed, 11 insertions, 9 deletions
diff --git a/block/blk-settings.c b/block/blk-settings.c index 69c42adde52..57af728d94b 100644 --- a/block/blk-settings.c +++ b/block/blk-settings.c @@ -156,26 +156,28 @@ EXPORT_SYMBOL(blk_queue_make_request); /** * blk_queue_bounce_limit - set bounce buffer limit for queue - * @q: the request queue for the device - * @dma_addr: bus address limit + * @q: the request queue for the device + * @dma_mask: the maximum address the device can handle * * Description: * Different hardware can have different requirements as to what pages * it can do I/O directly to. A low level driver can call * blk_queue_bounce_limit to have lower memory pages allocated as bounce - * buffers for doing I/O to pages residing above @dma_addr. + * buffers for doing I/O to pages residing above @dma_mask. **/ -void blk_queue_bounce_limit(struct request_queue *q, u64 dma_addr) +void blk_queue_bounce_limit(struct request_queue *q, u64 dma_mask) { - unsigned long b_pfn = dma_addr >> PAGE_SHIFT; + unsigned long b_pfn = dma_mask >> PAGE_SHIFT; int dma = 0; q->bounce_gfp = GFP_NOIO; #if BITS_PER_LONG == 64 - /* Assume anything <= 4GB can be handled by IOMMU. - Actually some IOMMUs can handle everything, but I don't - know of a way to test this here. */ - if (b_pfn < (min_t(u64, 0x100000000UL, BLK_BOUNCE_HIGH) >> PAGE_SHIFT)) + /* + * Assume anything <= 4GB can be handled by IOMMU. Actually + * some IOMMUs can handle everything, but I don't know of a + * way to test this here. + */ + if (b_pfn < (min_t(u64, 0xffffffffUL, BLK_BOUNCE_HIGH) >> PAGE_SHIFT)) dma = 1; q->bounce_pfn = max_low_pfn; #else |