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From 2d6b7bce089e52563bd9c67df62f48e90b48047d Mon Sep 17 00:00:00 2001
From: Julien Thierry <jthierry@redhat.com>
Date: Wed, 6 May 2020 14:30:57 +0100
Subject: [PATCH] Symbol version change
This change causes:
1) Some exported symbols in drivers/base/core.c to see their CRCs
change.
2) Changes usb_get_dev() referencing a get_device() whose CRC has
changed, causing the symbol and the new CRC to be included in the
__version section of the final module.
This makes the final module unloadable for the target kernel.
See "Exported symbol versioning" of the patch author guide for more
detail.
---
drivers/base/core.c | 2 ++
drivers/usb/core/usb.c | 2 ++
2 files changed, 4 insertions(+)
diff -Nupr src.orig/drivers/base/core.c src/drivers/base/core.c
--- src.orig/drivers/base/core.c 2023-01-12 11:20:06.403705933 -0500
+++ src/drivers/base/core.c 2023-01-12 11:21:27.466186559 -0500
@@ -36,6 +36,8 @@
#include "physical_location.h"
#include "power/power.h"
+#include <linux/blktrace_api.h>
+
#ifdef CONFIG_SYSFS_DEPRECATED
#ifdef CONFIG_SYSFS_DEPRECATED_V2
long sysfs_deprecated = 1;
diff -Nupr src.orig/drivers/usb/core/usb.c src/drivers/usb/core/usb.c
--- src.orig/drivers/usb/core/usb.c 2023-01-12 11:20:06.490706448 -0500
+++ src/drivers/usb/core/usb.c 2023-01-12 11:21:27.468186571 -0500
@@ -697,6 +697,8 @@ EXPORT_SYMBOL_GPL(usb_alloc_dev);
*/
struct usb_device *usb_get_dev(struct usb_device *dev)
{
+ barrier();
+
if (dev)
get_device(&dev->dev);
return dev;
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