From d19f05d8a8fa221e5d5f4eaca0f3ca5874c990d3 Mon Sep 17 00:00:00 2001
From: "Luis R. Rodriguez" <mcgrof@suse.com>
Date: Wed, 27 May 2015 11:09:38 +0930
Subject: kernel/params.c: generalize bool_enable_only

This takes out the bool_enable_only implementation from
the module loading code and generalizes it so that others
can make use of it.

Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: linux-kernel@vger.kernel.org
Cc: cocci@systeme.lip6.fr
Signed-off-by: Luis R. Rodriguez <mcgrof@suse.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
---
 kernel/module.c | 31 -------------------------------
 1 file changed, 31 deletions(-)

(limited to 'kernel/module.c')

diff --git a/kernel/module.c b/kernel/module.c
index 9e8c9305bba9..9b0e36145474 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -298,37 +298,6 @@ static bool sig_enforce = true;
 #else
 static bool sig_enforce = false;
 
-static int param_set_bool_enable_only(const char *val,
-				      const struct kernel_param *kp)
-{
-	int err = 0;
-	bool new_value;
-	bool orig_value = *(bool *)kp->arg;
-	struct kernel_param dummy_kp = *kp;
-
-	dummy_kp.arg = &new_value;
-
-	err = param_set_bool(val, &dummy_kp);
-	if (err)
-		return err;
-
-	/* Don't let them unset it once it's set! */
-	if (!new_value && orig_value)
-		return -EROFS;
-
-	if (new_value)
-		err = param_set_bool(val, kp);
-
-	return err;
-}
-
-static const struct kernel_param_ops param_ops_bool_enable_only = {
-	.flags = KERNEL_PARAM_OPS_FL_NOARG,
-	.set = param_set_bool_enable_only,
-	.get = param_get_bool,
-};
-#define param_check_bool_enable_only param_check_bool
-
 module_param(sig_enforce, bool_enable_only, 0644);
 #endif /* !CONFIG_MODULE_SIG_FORCE */
 #endif /* CONFIG_MODULE_SIG */
-- 
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