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authorDaniel Vetter <daniel.vetter@ffwll.ch>2012-03-19 00:34:25 +0100
committerSumit Semwal <sumit.semwal@ti.com>2012-03-26 11:32:50 +0530
commit6b607e3a658fee490bdabfdeb739a3eb498b1bff (patch)
treea10ad6f713586f9dc7584fe54110d1c44f87b1d5 /include/linux/dma-buf.h
parentf9a24d1ac9cb82baf5ec5efdb6580a9ce0bd5bfc (diff)
downloadop-kernel-dev-6b607e3a658fee490bdabfdeb739a3eb498b1bff.zip
op-kernel-dev-6b607e3a658fee490bdabfdeb739a3eb498b1bff.tar.gz
dma-buf: don't hold the mutex around map/unmap calls
The mutex protects the attachment list and hence needs to be held around the callbakc to the exporters (optional) attach/detach functions. Holding the mutex around the map/unmap calls doesn't protect any dma_buf state. Exporters need to properly protect any of their own state anyway (to protect against calls from their own interfaces). So this only makes the locking messier (and lockdep easier to anger). Therefore let's just drop this. v2: Rebased on top of latest dma-buf-next git. Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Reviewed-by: Rob Clark <rob.clark@linaro.org> Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org>
Diffstat (limited to 'include/linux/dma-buf.h')
-rw-r--r--include/linux/dma-buf.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/dma-buf.h b/include/linux/dma-buf.h
index bc4203dc..24e0f48 100644
--- a/include/linux/dma-buf.h
+++ b/include/linux/dma-buf.h
@@ -88,7 +88,7 @@ struct dma_buf {
struct file *file;
struct list_head attachments;
const struct dma_buf_ops *ops;
- /* mutex to serialize list manipulation and other ops */
+ /* mutex to serialize list manipulation and attach/detach */
struct mutex lock;
void *priv;
};
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