Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757166AbZC0Kbf (ORCPT ); Fri, 27 Mar 2009 06:31:35 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754848AbZC0KbX (ORCPT ); Fri, 27 Mar 2009 06:31:23 -0400 Received: from smtp.movial.fi ([62.236.91.34]:50157 "EHLO smtp.movial.fi" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754208AbZC0KbX (ORCPT ); Fri, 27 Mar 2009 06:31:23 -0400 X-Greylist: delayed 1304 seconds by postgrey-1.27 at vger.kernel.org; Fri, 27 Mar 2009 06:31:22 EDT Message-ID: <49CCA5DF.6040804@movial.com> Date: Fri, 27 Mar 2009 12:09:35 +0200 From: Dmitri Vorobiev Organization: Movial Creative Technologies User-Agent: Icedove 1.5.0.14eol (X11/20090105) MIME-Version: 1.0 To: LKML Subject: strange code in include/linux/kernel_stat.h Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 923 Lines: 24 Hi, Depending on whether the CONFIG_GENERIC_HARDIRQS option is enabled or not, the header file include/linux/kernel_stat.h defines the following two entities: - the macro kstat_irqs_this_cpu for the case when CONFIG_GENERIC_HARDIRQS is set: #define kstat_irqs_this_cpu(DESC) \ ((DESC)->kstat_irqs[smp_processor_id()]) - another macro with the same name as the macro above but for the case CONFIG_GENERIC_HARDIRQS is not set: #define kstat_irqs_this_cpu(irq) \ (kstat_this_cpu.irqs[irq]) Apparently, it is assumed that the types for the macro argument are different, and depend on the value of CONFIG_GENERIC_HARDIRQS. Is this intentional? Thanks, Dmitri -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/