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| author | Christian König <christian.koenig@amd.com> | 2020-09-14 15:09:33 +0200 |
|---|---|---|
| committer | Christian König <christian.koenig@amd.com> | 2020-11-05 13:03:52 +0100 |
| commit | 2b5b95b1ff3d70a95013a45e3b5b90f1daf42348 (patch) | |
| tree | 0d0d804862b63c20500e6e947931d18f440dbb45 /drivers/dma-buf | |
| parent | 0227da01f2559626396af5f6c7453360db86c1f6 (diff) | |
| download | linux-2b5b95b1ff3d70a95013a45e3b5b90f1daf42348.tar.bz2 | |
mm: introduce vma_set_file function v4
Add the new vma_set_file() function to allow changing
vma->vm_file with the necessary refcount dance.
v2: add more users of this.
v3: add missing EXPORT_SYMBOL, rebase on mmap cleanup,
add comments why we drop the reference on two occasions.
v4: make it clear that changing an anonymous vma is illegal.
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> (v2)
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://patchwork.freedesktop.org/patch/394773/
Diffstat (limited to 'drivers/dma-buf')
| -rw-r--r-- | drivers/dma-buf/dma-buf.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c index 3d22dff1dab9..696b4ce4cfd9 100644 --- a/drivers/dma-buf/dma-buf.c +++ b/drivers/dma-buf/dma-buf.c @@ -1183,8 +1183,7 @@ int dma_buf_mmap(struct dma_buf *dmabuf, struct vm_area_struct *vma, return -EINVAL; /* readjust the vma */ - fput(vma->vm_file); - vma->vm_file = get_file(dmabuf->file); + vma_set_file(vma, dmabuf->file); vma->vm_pgoff = pgoff; return dmabuf->ops->mmap(dmabuf, vma); |