diff options
Diffstat (limited to 'Documentation/dma-buf-sharing.txt')
| -rw-r--r-- | Documentation/dma-buf-sharing.txt | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/Documentation/dma-buf-sharing.txt b/Documentation/dma-buf-sharing.txt index ad86fb86c9a0..0188903bc9e1 100644 --- a/Documentation/dma-buf-sharing.txt +++ b/Documentation/dma-buf-sharing.txt | |||
| @@ -376,7 +376,7 @@ Being able to mmap an export dma-buf buffer object has 2 main use-cases: | |||
| 376 | leaving the cpu domain and flushing caches at fault time. Note that all the | 376 | leaving the cpu domain and flushing caches at fault time. Note that all the |
| 377 | dma_buf files share the same anon inode, hence the exporter needs to replace | 377 | dma_buf files share the same anon inode, hence the exporter needs to replace |
| 378 | the dma_buf file stored in vma->vm_file with it's own if pte shootdown is | 378 | the dma_buf file stored in vma->vm_file with it's own if pte shootdown is |
| 379 | requred. This is because the kernel uses the underlying inode's address_space | 379 | required. This is because the kernel uses the underlying inode's address_space |
| 380 | for vma tracking (and hence pte tracking at shootdown time with | 380 | for vma tracking (and hence pte tracking at shootdown time with |
| 381 | unmap_mapping_range). | 381 | unmap_mapping_range). |
| 382 | 382 | ||
| @@ -388,7 +388,7 @@ Being able to mmap an export dma-buf buffer object has 2 main use-cases: | |||
| 388 | Exporters that shoot down mappings (for any reasons) shall not do any | 388 | Exporters that shoot down mappings (for any reasons) shall not do any |
| 389 | synchronization at fault time with outstanding device operations. | 389 | synchronization at fault time with outstanding device operations. |
| 390 | Synchronization is an orthogonal issue to sharing the backing storage of a | 390 | Synchronization is an orthogonal issue to sharing the backing storage of a |
| 391 | buffer and hence should not be handled by dma-buf itself. This is explictly | 391 | buffer and hence should not be handled by dma-buf itself. This is explicitly |
| 392 | mentioned here because many people seem to want something like this, but if | 392 | mentioned here because many people seem to want something like this, but if |
| 393 | different exporters handle this differently, buffer sharing can fail in | 393 | different exporters handle this differently, buffer sharing can fail in |
| 394 | interesting ways depending upong the exporter (if userspace starts depending | 394 | interesting ways depending upong the exporter (if userspace starts depending |
