usb: xhci: mark xhci_unmap_td_bounce_buffer() static

Message ID
State New
Headers show

Commit Message

Baoyou Xie Sept. 23, 2016, 1:46 p.m.
We get 1 warning when building kernel with W=1:
drivers/usb/host/xhci-ring.c:608:6: warning: no previous prototype for 'xhci_unmap_td_bounce_buffer' [-Wmissing-prototypes]

In fact, this function is only used in the file in which it is
declared and don't need a declaration, but can be made static.
so this patch marks this function with 'static'.

Signed-off-by: Baoyou Xie <>

 drivers/usb/host/xhci-ring.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)


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diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index 797137e..9cf70c9 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -605,8 +605,9 @@  static void xhci_giveback_urb_in_irq(struct xhci_hcd *xhci,
-void xhci_unmap_td_bounce_buffer(struct xhci_hcd *xhci, struct xhci_ring *ring,
-				 struct xhci_td *td)
+static void
+xhci_unmap_td_bounce_buffer(struct xhci_hcd *xhci, struct xhci_ring *ring,
+			    struct xhci_td *td)
 	struct device *dev = xhci_to_hcd(xhci)->self.controller;
 	struct xhci_segment *seg = td->bounce_seg;