From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753795AbbCEBdB (ORCPT ); Wed, 4 Mar 2015 20:33:01 -0500 Received: from mail-pa0-f53.google.com ([209.85.220.53]:37667 "EHLO mail-pa0-f53.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753364AbbCEBdA (ORCPT ); Wed, 4 Mar 2015 20:33:00 -0500 From: "Luis R. Rodriguez" To: gregkh@linuxfoundation.org, akpm@linux-foundation.org, tony@atomide.com, tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, jgross@suse.com, luto@amacapital.net, toshi.kani@hp.com, dave.hansen@linux.intel.com, JBeulich@suse.com, pavel@ucw.cz, qiuxishi@huawei.com, david.vrabel@citrix.com, bp@suse.de, vbabka@suse.cz, iamjoonsoo.kim@lge.com, decui@microsoft.com Cc: linux-kernel@vger.kernel.org, x86@kernel.org, julia.lawall@lip6.fr, "Luis R. Rodriguez" Subject: [RFC v1 3/4] init.h: add early_param_on_off() Date: Wed, 4 Mar 2015 17:24:13 -0800 Message-Id: <1425518654-3403-4-git-send-email-mcgrof@do-not-panic.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1425518654-3403-1-git-send-email-mcgrof@do-not-panic.com> References: <1425518654-3403-1-git-send-email-mcgrof@do-not-panic.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: "Luis R. Rodriguez" At times all you need is a kconfig variable to enable a feature, by default but you may want to also enable / disable it through a kernel parameter. In such cases the parameter routines to turn the thing on / off are really simple. Just use a wrapper for this, it lets us generalize the code and makes it easier to associate parameters with related kernel configuration options. Cc: Greg Kroah-Hartman Cc: Tony Lindgren Cc: linux-kernel@vger.kernel.org Cc: Thomas Gleixner Cc: Ingo Molnar Cc: "H. Peter Anvin" Cc: x86@kernel.org Cc: Juergen Gross Cc: Andy Lutomirski Cc: Toshi Kani Cc: Dave Hansen Cc: Jan Beulich Cc: Pavel Machek Cc: Xishi Qiu Cc: Andrew Morton Cc: David Vrabel Cc: Borislav Petkov Cc: Vlastimil Babka Cc: Joonsoo Kim Cc: Dexuan Cui Signed-off-by: Luis R. Rodriguez --- include/linux/init.h | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/include/linux/init.h b/include/linux/init.h index 2df8e8d..bc11ff9 100644 --- a/include/linux/init.h +++ b/include/linux/init.h @@ -268,6 +268,21 @@ struct obs_kernel_param { #define early_param(str, fn) \ __setup_param(str, fn, fn, 1) +#define early_param_on_off(str_on, str_off, var, config) \ + int var = IS_ENABLED(config); \ + static int __init parse_##var##_on(char *arg) \ + { \ + var = 1; \ + return 0; \ + } \ + static int __init parse_##var##_off(char *arg) \ + { \ + var = 0; \ + return 0; \ + } \ + __setup_param(str_on, parse_##var##_on, parse_##var##_on, 1); \ + __setup_param(str_off, parse_##var##_off, parse_##var##_off, 1) + /* Relies on boot_command_line being set */ void __init parse_early_param(void); void __init parse_early_options(char *cmdline); -- 2.2.2