diff options
Diffstat (limited to 'include/linux/dma-buf.h')
| -rw-r--r-- | include/linux/dma-buf.h | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/include/linux/dma-buf.h b/include/linux/dma-buf.h index bd2e52ccc4f2..9978b614a1aa 100644 --- a/include/linux/dma-buf.h +++ b/include/linux/dma-buf.h @@ -53,7 +53,7 @@ struct dma_buf_attachment; * @begin_cpu_access: [optional] called before cpu access to invalidate cpu * caches and allocate backing storage (if not yet done) * respectively pin the objet into memory. - * @end_cpu_access: [optional] called after cpu access to flush cashes. + * @end_cpu_access: [optional] called after cpu access to flush caches. * @kmap_atomic: maps a page from the buffer into kernel address * space, users may not block until the subsequent unmap call. * This callback must not sleep. @@ -119,8 +119,10 @@ struct dma_buf { struct file *file; struct list_head attachments; const struct dma_buf_ops *ops; - /* mutex to serialize list manipulation and attach/detach */ + /* mutex to serialize list manipulation, attach/detach and vmap/unmap */ struct mutex lock; + unsigned vmapping_counter; + void *vmap_ptr; void *priv; }; |