linux-kernel - [PATCH v9 05/10] module.h: MODULE_DEVICE

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20221219204619.2205248-6-allenwebb@google.com>
Date:   Mon, 19 Dec 2022 14:46:13 -0600
From:   Allen Webb <allenwebb@...gle.com>
To:     "linux-modules@...r.kernel.org" <linux-modules@...r.kernel.org>,
        "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Cc:     Luis Chamberlain <mcgrof@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Allen Webb <allenwebb@...gle.com>
Subject: [PATCH v9 05/10] module.h: MODULE_DEVICE_TABLE for built-in modules

Implement MODULE_DEVICE_TABLE for build-in modules to make it possible
to generate a builtin.alias file to complement modules.alias.

Signed-off-by: Allen Webb <allenwebb@...gle.com>
---
 include/linux/module.h | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/include/linux/module.h b/include/linux/module.h
index ec61fb53979a..3d1b04ca6350 100644
--- a/include/linux/module.h
+++ b/include/linux/module.h
@@ -243,7 +243,20 @@ extern void cleanup_module(void);
 extern typeof(name) __mod_##type##__##name##_device_table		\
   __attribute__ ((unused, alias(__stringify(name))))
 #else  /* !MODULE */
-#define MODULE_DEVICE_TABLE(type, name)
+/*
+ * The names may not be unique for built-in modules, so include the module name
+ * to guarantee uniqueness.
+ *
+ * Note that extern is needed because modpost reads these symbols to generate
+ * modalias entries for each match id in each device table. They are not used
+ * at runtime.
+ */
+#define MODULE_DEVICE_TABLE(type, name)					\
+extern void *CONCATENATE(						\
+	CONCATENATE(__mod_##type##__##name##__,				\
+		__KBUILD_MODNAME),					\
+	_device_table)							\
+	__attribute__ ((unused, alias(__stringify(name))))
 #endif
 
 /* Version of form [<epoch>:]<version>[-<extra-version>].
-- 
2.37.3