From: "Luis R. Rodriguez" <mcg...@suse.com>
This adds a couple of bool module_param_config_*() helpers
which are designed to let us easily associate a booloean
module parameter with an associated kernel configuration
option, and to help us remove #ifdef'ery eyesores.
Cc: Rusty Russell <ru...@rustcorp.com.au>
Cc: Jani Nikula <jani.nik...@intel.com>
Cc: Christoph Hellwig <h...@infradead.org>
Cc: Andrew Morton <a...@linux-foundation.org>
Cc: Geert Uytterhoeven <ge...@linux-m68k.org>
Cc: Hannes Reinecke <h...@suse.de>
Cc: Kees Cook <keesc...@chromium.org>
Cc: Tejun Heo <t...@kernel.org>
Cc: Ingo Molnar <mi...@kernel.org>
Cc: linux-ker...@vger.kernel.org
Cc: co...@systeme.lip6.fr
Signed-off-by: Luis R. Rodriguez <mcg...@suse.com>
---
include/linux/moduleparam.h | 37 +++++++++++++++++++++++++++++++++++++
1 file changed, 37 insertions(+)
diff --git a/include/linux/moduleparam.h b/include/linux/moduleparam.h
index 7e00799..fdf7b87 100644
--- a/include/linux/moduleparam.h
+++ b/include/linux/moduleparam.h
@@ -155,6 +155,43 @@ struct kparam_array
__MODULE_PARM_TYPE(name, #type)
/**
+ * module_param_config_on_off - bool parameter with run time override
+ * @name: a valid C identifier which is the parameter name.
+ * @value: the actual lvalue to alter.
+ * @perm: visibility in sysfs.
+ * @config: kernel parameter which will enable this option if this
+ * kernel configuration option has been enabled.
+ *
+ * This lets you define a bool module paramter which by default will be
+ * set to true if the config option has been set on your kernel's
+ * configuration, otherwise it is set to false.
+ */
+#define module_param_config_on_off(name, var, perm, config) \
+ static bool var = IS_ENABLED(config); \
+ module_param_named(name, var, bool, perm);
+
+/**
+ * module_param_config_on - bool parameter with run time enablement override
+ * @name: a valid C identifier which is the parameter name.
+ * @value: the actual lvalue to alter.
+ * @perm: visibility in sysfs.
+ * @config: kernel parameter which will enable this option if this
+ * kernel configuration option has been enabled.
+ *
+ * This lets you define a bool module paramter which by default will be
+ * set to true if the config option has been set on your kernel's
+ * configuration, otherwise it is set to false. This particular helper
+ * will ensure that if the kernel configuration has been set you will not
+ * be able to disable this kernel parameter. You can only use this to let
+ * the an option that was disabled on your kernel configuration be enabled
+ * at run time.
+ */
+#define module_param_config_on(name, var, perm, config) \
+ static bool var = IS_ENABLED(config); \
+ module_param_named(name, var, bool_enable_only, perm);
+
+
+/**
* module_param_cb - general callback for a module/cmdline parameter
* @name: a valid C identifier which is the parameter name.
* @ops: the set & get operations for this parameter.
--
2.3.2.209.gd67f9d5.dirty
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