From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joe Perches Subject: [PATCH] thinkpad_acpi: Remove side effects from vdbg_printk -> no_printk macro Date: Wed, 26 Aug 2015 11:13:38 -0700 Message-ID: <1440612818.2780.24.camel@perches.com> Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit Return-path: Received: from smtprelay0228.hostedemail.com ([216.40.44.228]:38959 "EHLO smtprelay.hostedemail.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751313AbbHZSNo (ORCPT ); Wed, 26 Aug 2015 14:13:44 -0400 Sender: platform-driver-x86-owner@vger.kernel.org List-ID: To: Henrique de Moraes Holschuh Cc: Darren Hart , ibm-acpi-devel@lists.sourceforge.net, platform-driver-x86@vger.kernel.org, linux-kernel vdbg_printk when not using CONFIG_THINKPAD_ACPI_DEBUG uses no_printk which produces no logging output but always evaluates arguments. Change the macro to surround the no_printk call with do { if (0) no_printk(...); } while (0) to avoid the unnecessary argument evaluations. $ size drivers/platform/x86/thinkpad_acpi.o* text data bss dec hex filename 60918 6184 824 67926 10956 drivers/platform/x86/thinkpad_acpi.o.new 60927 6184 824 67935 1095f drivers/platform/x86/thinkpad_acpi.o.old Signed-off-by: Joe Perches --- drivers/platform/x86/thinkpad_acpi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c index 33e488c..131dd74 100644 --- a/drivers/platform/x86/thinkpad_acpi.c +++ b/drivers/platform/x86/thinkpad_acpi.c @@ -402,7 +402,7 @@ static const char *str_supported(int is_supported); #else static inline const char *str_supported(int is_supported) { return ""; } #define vdbg_printk(a_dbg_level, format, arg...) \ - no_printk(format, ##arg) + do { if (0) no_printk(format, ##arg); } while (0) #endif static void tpacpi_log_usertask(const char * const what)