[PATCH] dmaengine: virt-dma: adjust function declarations in the virt-dma.h

[Baoyou Xie]

We get 2 warnings when building kernel with W=1:
drivers/dma/virt-dma.c:22:14: warning: no previous prototype for 'vchan_tx_submit' [-Wmissing-prototypes]
drivers/dma/virt-dma.c:52:5: warning: no previous prototype for 'vchan_tx_desc_free' [-Wmissing-prototypes]

In fact, both functions are declared in the vchan_tx_prep(),
but should be moved outside from vchan_tx_prep().

Signed-off-by: Baoyou Xie <baoyou.xie@xxxxxxxxxx>
---
 drivers/dma/virt-dma.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/dma/virt-dma.h b/drivers/dma/virt-dma.h
index d9731ca..354253a 100644
--- a/drivers/dma/virt-dma.h
+++ b/drivers/dma/virt-dma.h
@@ -52,11 +52,11 @@ struct virt_dma_desc *vchan_find_desc(struct virt_dma_chan *, dma_cookie_t);
  * @vd: virtual descriptor to prepare
  * @tx_flags: flags argument passed in to prepare function
  */
+extern dma_cookie_t vchan_tx_submit(struct dma_async_tx_descriptor *);
+extern int vchan_tx_desc_free(struct dma_async_tx_descriptor *);
 static inline struct dma_async_tx_descriptor *vchan_tx_prep(struct virt_dma_chan *vc,
 	struct virt_dma_desc *vd, unsigned long tx_flags)
 {
-	extern dma_cookie_t vchan_tx_submit(struct dma_async_tx_descriptor *);
-	extern int vchan_tx_desc_free(struct dma_async_tx_descriptor *);
 	unsigned long flags;
 
 	dma_async_tx_descriptor_init(&vd->tx, &vc->chan);
-- 
2.7.4