diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/media/video/videobuf-dma-sg.c | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/drivers/media/video/videobuf-dma-sg.c b/drivers/media/video/videobuf-dma-sg.c index 17b1f89e813..8924e51408c 100644 --- a/drivers/media/video/videobuf-dma-sg.c +++ b/drivers/media/video/videobuf-dma-sg.c @@ -57,7 +57,13 @@ MODULE_LICENSE("GPL"); /* --------------------------------------------------------------------- */ -struct scatterlist *videobuf_vmalloc_to_sg(unsigned char *virt, int nr_pages) +/* + * Return a scatterlist for some page-aligned vmalloc()'ed memory + * block (NULL on errors). Memory for the scatterlist is allocated + * using kmalloc. The caller must free the memory. + */ +static struct scatterlist *videobuf_vmalloc_to_sg(unsigned char *virt, + int nr_pages) { struct scatterlist *sglist; struct page *pg; @@ -81,10 +87,14 @@ err: vfree(sglist); return NULL; } -EXPORT_SYMBOL_GPL(videobuf_vmalloc_to_sg); -struct scatterlist *videobuf_pages_to_sg(struct page **pages, int nr_pages, - int offset) +/* + * Return a scatterlist for a an array of userpages (NULL on errors). + * Memory for the scatterlist is allocated using kmalloc. The caller + * must free the memory. + */ +static struct scatterlist *videobuf_pages_to_sg(struct page **pages, + int nr_pages, int offset) { struct scatterlist *sglist; int i; |