From mboxrd@z Thu Jan 1 00:00:00 1970 From: mcgrof@do-not-panic.com (Luis R. Rodriguez) Date: Mon, 20 Apr 2015 16:30:35 -0700 Subject: [Cocci] [PATCH v1 4/6] moduleparam.h: add module_param_config_*() helpers In-Reply-To: <1429572637-30234-1-git-send-email-mcgrof@do-not-panic.com> References: <1429572637-30234-1-git-send-email-mcgrof@do-not-panic.com> Message-ID: <1429572637-30234-5-git-send-email-mcgrof@do-not-panic.com> To: cocci@systeme.lip6.fr List-Id: cocci@systeme.lip6.fr From: "Luis R. Rodriguez" 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 Cc: Jani Nikula Cc: Christoph Hellwig Cc: Andrew Morton Cc: Geert Uytterhoeven Cc: Hannes Reinecke Cc: Kees Cook Cc: Tejun Heo Cc: Ingo Molnar Cc: linux-kernel at vger.kernel.org Cc: cocci at systeme.lip6.fr Signed-off-by: Luis R. Rodriguez --- 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