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authorDaniel Vetter <daniel.vetter@ffwll.ch>2019-11-18 11:35:34 +0100
committerDaniel Vetter <daniel.vetter@ffwll.ch>2019-11-25 22:36:52 +0100
commitdea8c09c3285912d3f3566210ebc5ecc3d9191c7 (patch)
treef05cb4d39825b5f42124dd9e303605747389d25e /drivers/xen
parent42aa7c6eb3ebfc280cc116978a3c003bcadb3440 (diff)
xen/gntdev-dmabuf: Ditch dummy map functions
There's no in-kernel users for the k(un)map stuff. And the mmap one is actively harmful - return 0 and then _not_ actually mmaping can't end well. Acked-by: Sumit Semwal <sumit.semwal@linaro.org> Reviewed-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com> Reviewed-by: Juergen Gross <jgross@suse.com> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: Juergen Gross <jgross@suse.com> Cc: Stefano Stabellini <sstabellini@kernel.org> Cc: xen-devel@lists.xenproject.org Link: https://patchwork.freedesktop.org/patch/msgid/20191118103536.17675-14-daniel.vetter@ffwll.ch
Diffstat (limited to 'drivers/xen')
-rw-r--r--drivers/xen/gntdev-dmabuf.c23
1 files changed, 0 insertions, 23 deletions
diff --git a/drivers/xen/gntdev-dmabuf.c b/drivers/xen/gntdev-dmabuf.c
index 2c4f324f8626..fe7bd69d6955 100644
--- a/drivers/xen/gntdev-dmabuf.c
+++ b/drivers/xen/gntdev-dmabuf.c
@@ -342,35 +342,12 @@ static void dmabuf_exp_ops_release(struct dma_buf *dma_buf)
mutex_unlock(&priv->lock);
}
-static void *dmabuf_exp_ops_kmap(struct dma_buf *dma_buf,
- unsigned long page_num)
-{
- /* Not implemented. */
- return NULL;
-}
-
-static void dmabuf_exp_ops_kunmap(struct dma_buf *dma_buf,
- unsigned long page_num, void *addr)
-{
- /* Not implemented. */
-}
-
-static int dmabuf_exp_ops_mmap(struct dma_buf *dma_buf,
- struct vm_area_struct *vma)
-{
- /* Not implemented. */
- return 0;
-}
-
static const struct dma_buf_ops dmabuf_exp_ops = {
.attach = dmabuf_exp_ops_attach,
.detach = dmabuf_exp_ops_detach,
.map_dma_buf = dmabuf_exp_ops_map_dma_buf,
.unmap_dma_buf = dmabuf_exp_ops_unmap_dma_buf,
.release = dmabuf_exp_ops_release,
- .map = dmabuf_exp_ops_kmap,
- .unmap = dmabuf_exp_ops_kunmap,
- .mmap = dmabuf_exp_ops_mmap,
};
struct gntdev_dmabuf_export_args {