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Diffstat (limited to 'Documentation/block/biodoc.txt')
| -rw-r--r-- | Documentation/block/biodoc.txt | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/Documentation/block/biodoc.txt b/Documentation/block/biodoc.txt index 9490f2845f06..01c0a03407cc 100644 --- a/Documentation/block/biodoc.txt +++ b/Documentation/block/biodoc.txt @@ -216,7 +216,7 @@ may need to abort DMA operations and revert to PIO for the transfer, in which case a virtual mapping of the page is required. For SCSI it is also done in some scenarios where the low level driver cannot be trusted to handle a single sg entry correctly. The driver is expected to perform the -kmaps as needed on such occasions using the __bio_kmap_atomic and bio_kmap_irq +kmaps as needed on such occasions using the bio_kmap_irq and friends routines as appropriate. A driver could also use the blk_queue_bounce() routine on its own to bounce highmem i/o to low memory for specific requests if so desired. @@ -1137,7 +1137,7 @@ use dma_map_sg for scatter gather) to be able to ship it to the driver. For PIO drivers (or drivers that need to revert to PIO transfer once in a while (IDE for example)), where the CPU is doing the actual data transfer a virtual mapping is needed. If the driver supports highmem I/O, -(Sec 1.1, (ii) ) it needs to use __bio_kmap_atomic and bio_kmap_irq to +(Sec 1.1, (ii) ) it needs to use __bio_kmap_atomic or similar to temporarily map a bio into the virtual address space. |