linux-kernel - [PATCH] usb: hide unused usbfs_notify

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Date:   Tue, 16 May 2023 22:17:42 +0200
From:   Arnd Bergmann <arnd@...nel.org>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Alan Stern <stern@...land.harvard.edu>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Sebastian Reichel <sebastian.reichel@...labora.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] usb: hide unused usbfs_notify_suspend/resume functions

From: Arnd Bergmann <arnd@...db.de>

The declaration is in an #ifdef, which causes warnings when building
with 'make W=1' and without CONFIG_PM:

drivers/usb/core/devio.c:742:6: error: no previous prototype for 'usbfs_notify_suspend'
drivers/usb/core/devio.c:747:6: error: no previous prototype for 'usbfs_notify_resume'

Use the same #ifdef check around the function definitions to avoid
the warnings and slightly shrink the USB core.

Fixes: 7794f486ed0b ("usbfs: Add ioctls for runtime power management")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/usb/core/devio.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
index e501a03d6c70..1622ad35428d 100644
--- a/drivers/usb/core/devio.c
+++ b/drivers/usb/core/devio.c
@@ -738,6 +738,7 @@ static int driver_resume(struct usb_interface *intf)
 	return 0;
 }
 
+#ifdef CONFIG_PM
 /* The following routines apply to the entire device, not interfaces */
 void usbfs_notify_suspend(struct usb_device *udev)
 {
@@ -756,6 +757,7 @@ void usbfs_notify_resume(struct usb_device *udev)
 	}
 	mutex_unlock(&usbfs_mutex);
 }
+#endif
 
 struct usb_driver usbfs_driver = {
 	.name =		"usbfs",
-- 
2.39.2