Messages in this thread Patch in this message | | | From | "Luis R. Rodriguez" <> | Subject | [PATCH v1 4/6] moduleparam.h: add module_param_config_*() helpers | Date | Mon, 20 Apr 2015 16:30:35 -0700 |
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From: "Luis R. Rodriguez" <mcgrof@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 <rusty@rustcorp.com.au> Cc: Jani Nikula <jani.nikula@intel.com> Cc: Christoph Hellwig <hch@infradead.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Hannes Reinecke <hare@suse.de> 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> --- 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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