linux-kernel - [PATCH 3/3] module: Do not paper over type mismatches in module_param

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Message-Id: <1508292283-140003-4-git-send-email-keescook@chromium.org>
Date:   Tue, 17 Oct 2017 19:04:43 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Jessica Yu <jeyu@...nel.org>
Cc:     Kees Cook <keescook@...omium.org>, Arnd Bergmann <arnd@...db.de>,
        linux-kernel@...r.kernel.org
Subject: [PATCH 3/3] module: Do not paper over type mismatches in module_param_call()

The module_param_call() macro was explicitly casting the .set and
.get function prototypes away. This can lead to hard-to-find type
mismatches. Now that all the function prototypes have been fixed
tree-wide, we can drop these casts, and use named initializers too.

Signed-off-by: Kees Cook <keescook@...omium.org>
---
 include/linux/moduleparam.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/linux/moduleparam.h b/include/linux/moduleparam.h
index 037a90a522a5..20386252fe3e 100644
--- a/include/linux/moduleparam.h
+++ b/include/linux/moduleparam.h
@@ -227,9 +227,9 @@ struct kparam_array
 	    VERIFY_OCTAL_PERMISSIONS(perm), level, flags, { arg } }
 
 /* Obsolete - use module_param_cb() */
-#define module_param_call(name, set, get, arg, perm)			\
+#define module_param_call(name, _set, _get, arg, perm)			\
 	static const struct kernel_param_ops __param_ops_##name =	\
-		{ .flags = 0, (void *)set, (void *)get };		\
+		{ .flags = 0, .set = _set, .get = _get };		\
 	__module_param_call(MODULE_PARAM_PREFIX,			\
 			    name, &__param_ops_##name, arg, perm, -1, 0)
 
-- 
2.7.4