Jan 10 2010

USB host: make Open Firmware device id constant 

Author: Németh Márton <nm127@freemail.hu>

The match_table field of the struct of_device_id is constant in 
so it is worth to make the initialization data also constant.

The semantic match that finds this kind of pattern is as follows:
(http://coccinelle.lip6.fr/)

// 
@r@
disable decl_init,const_decl_init;
identifier I1, I2, x;
@@
	struct I1 {
	  ...
	  const struct I2 *x;
	  ...
	};
@s@
identifier r.I1, y;
identifier r.x, E;
@@
	struct I1 y = {
	  .x = E,
	};
@c@
identifier r.I2;
identifier s.E;
@@
	const struct I2 E[] = ... ;
@depends on !c@
identifier r.I2;
identifier s.E;
@@
+	const
	struct I2 E[] = ...;
// 

Signed-off-by: Németh Márton 
Cc: Julia Lawall 
Cc: cocci@diku.dk
Signed-off-by: Greg Kroah-Hartman 


---
 drivers/usb/host/ehci-ppc-of.c    | 2 +-
 drivers/usb/host/ehci-xilinx-of.c | 2 +-
 drivers/usb/host/fhci-hcd.c       | 2 +-
 drivers/usb/host/isp1760-if.c     | 2 +-
 drivers/usb/host/ohci-ppc-of.c    | 2 +-
 5 files changed, 5 insertions(+), 5 deletions(-)
 
diff --git a/drivers/usb/host/ehci-ppc-of.c b/drivers/usb/host/ehci-ppc-of.c
index 36f96da..870b98e 100644
--- a/drivers/usb/host/ehci-ppc-of.c
+++ b/drivers/usb/host/ehci-ppc-of.c
@@ -264,7 +264,7 @@ static int ehci_hcd_ppc_of_shutdown(struct of_device *op)
 }
 
 
-static struct of_device_id ehci_hcd_ppc_of_match[] = {
+static const struct of_device_id ehci_hcd_ppc_of_match[] = {
 	{
 		.compatible = "usb-ehci",
 	},
diff --git a/drivers/usb/host/ehci-xilinx-of.c b/drivers/usb/host/ehci-xilinx-of.c
index a5861531..4937de7 100644
--- a/drivers/usb/host/ehci-xilinx-of.c
+++ b/drivers/usb/host/ehci-xilinx-of.c
@@ -281,7 +281,7 @@ static int ehci_hcd_xilinx_of_shutdown(struct of_device *op)
 }
 
 
-static struct of_device_id ehci_hcd_xilinx_of_match[] = {
+static const struct of_device_id ehci_hcd_xilinx_of_match[] = {
 		{.compatible = "xlnx,xps-usb-host-1.00.a",},
 	{},
 };
diff --git a/drivers/usb/host/fhci-hcd.c b/drivers/usb/host/fhci-hcd.c
index ed4b87c..5dcfb3d 100644
--- a/drivers/usb/host/fhci-hcd.c
+++ b/drivers/usb/host/fhci-hcd.c
@@ -805,7 +805,7 @@ static int __devexit of_fhci_remove(struct of_device *ofdev)
 	return fhci_remove(&ofdev->dev);
 }
 
-static struct of_device_id of_fhci_match[] = {
+static const struct of_device_id of_fhci_match[] = {
 	{ .compatible = "fsl,mpc8323-qe-usb", },
 	{},
 };
diff --git a/drivers/usb/host/isp1760-if.c b/drivers/usb/host/isp1760-if.c
index 1c9f977..4293cfd 100644
--- a/drivers/usb/host/isp1760-if.c
+++ b/drivers/usb/host/isp1760-if.c
@@ -109,7 +109,7 @@ static int of_isp1760_remove(struct of_device *dev)
 	return 0;
 }
 
-static struct of_device_id of_isp1760_match[] = {
+static const struct of_device_id of_isp1760_match[] = {
 	{
 		.compatible = "nxp,usb-isp1760",
 	},
diff --git a/drivers/usb/host/ohci-ppc-of.c b/drivers/usb/host/ohci-ppc-of.c
index 68a3017..2a7def1 100644
--- a/drivers/usb/host/ohci-ppc-of.c
+++ b/drivers/usb/host/ohci-ppc-of.c
@@ -212,7 +212,7 @@ static int ohci_hcd_ppc_of_shutdown(struct of_device *op)
 }
 
 
-static struct of_device_id ohci_hcd_ppc_of_match[] = {
+static const struct of_device_id ohci_hcd_ppc_of_match[] = {
 #ifdef CONFIG_USB_OHCI_HCD_PPC_OF_BE
 	{
 		.name = "usb",

qlambert