linux-kernel - [PATCH v2] USB: constify usb_mon

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Date:	Sat, 28 Nov 2015 16:07:10 +0100 (CET)
From:	Julia Lawall <julia.lawall@...6.fr>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
cc:	kernel-janitors@...r.kernel.org, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2] USB: constify usb_mon_operations structure

The usb_mon_operations structure is never modified, so declare it as const.

Done with the help of Coccinelle.

Signed-off-by: Julia Lawall <Julia.Lawall@...6.fr>

---
v2: Merge the previous 1/2 and 2/2 patches.

 drivers/usb/core/hcd.c     |    4 ++--
 drivers/usb/mon/mon_main.c |    2 +-
 include/linux/usb/hcd.h    |    4 ++--
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index 1c102d6..df0e3b9 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -3000,7 +3000,7 @@ EXPORT_SYMBOL_GPL(usb_hcd_platform_shutdown);

 #if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE)

-struct usb_mon_operations *mon_ops;
+const struct usb_mon_operations *mon_ops;

 /*
  * The registration is unlocked.
@@ -3010,7 +3010,7 @@ struct usb_mon_operations *mon_ops;
  * symbols from usbcore, usbcore gets referenced and cannot be unloaded first.
  */

-int usb_mon_register (struct usb_mon_operations *ops)
+int usb_mon_register(const struct usb_mon_operations *ops)
 {

 	if (mon_ops)
diff --git a/drivers/usb/mon/mon_main.c b/drivers/usb/mon/mon_main.c
index f7c292f..fec3f11 100644
--- a/drivers/usb/mon/mon_main.c
+++ b/drivers/usb/mon/mon_main.c
@@ -241,7 +241,7 @@ static struct notifier_block mon_nb = {
 /*
  * Ops
  */
-static struct usb_mon_operations mon_ops_0 = {
+static const struct usb_mon_operations mon_ops_0 = {
 	.urb_submit =	mon_submit,
 	.urb_submit_error = mon_submit_error,
 	.urb_complete =	mon_complete,
diff --git a/include/linux/usb/hcd.h b/include/linux/usb/hcd.h
index f89c24b..4dcf844 100644
--- a/include/linux/usb/hcd.h
+++ b/include/linux/usb/hcd.h
@@ -660,7 +660,7 @@ struct usb_mon_operations {
 	/* void (*urb_unlink)(struct usb_bus *bus, struct urb *urb); */
 };

-extern struct usb_mon_operations *mon_ops;
+extern const struct usb_mon_operations *mon_ops;

 static inline void usbmon_urb_submit(struct usb_bus *bus, struct urb *urb)
 {
@@ -682,7 +682,7 @@ static inline void usbmon_urb_complete(struct usb_bus *bus, struct urb *urb,
 		(*mon_ops->urb_complete)(bus, urb, status);
 }

-int usb_mon_register(struct usb_mon_operations *ops);
+int usb_mon_register(const struct usb_mon_operations *ops);
 void usb_mon_deregister(void);

 #else

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