Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752389AbaGJMGu (ORCPT ); Thu, 10 Jul 2014 08:06:50 -0400 Received: from mail-lb0-f172.google.com ([209.85.217.172]:59890 "EHLO mail-lb0-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752060AbaGJMGs (ORCPT ); Thu, 10 Jul 2014 08:06:48 -0400 From: Rasmus Villemoes To: Bjorn Helgaas Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, Rasmus Villemoes Subject: [PATCH] pci: Add include guard to include/linux/pci_ids.h Date: Thu, 10 Jul 2014 14:05:11 +0200 Message-Id: <1404993911-10544-1-git-send-email-linux@rasmusvillemoes.dk> X-Mailer: git-send-email 1.7.10.4 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Adding an include guard frees the preprocessor from reparsing over 2600 #defines in the cases where pci_ids.h is somehow included more than once. This gives a tiny-but-measurable performance improvement when compiling such files. Signed-off-by: Rasmus Villemoes --- include/linux/pci_ids.h | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h index 7fa3173..6ed0bb7 100644 --- a/include/linux/pci_ids.h +++ b/include/linux/pci_ids.h @@ -6,6 +6,8 @@ * Do not add new entries to this file unless the definitions * are shared between multiple drivers. */ +#ifndef _LINUX_PCI_IDS_H +#define _LINUX_PCI_IDS_H /* Device classes and subclasses */ @@ -2968,3 +2970,5 @@ #define PCI_DEVICE_ID_XEN_PLATFORM 0x0001 #define PCI_VENDOR_ID_OCZ 0x1b85 + +#endif /* _LINUX_PCI_IDS_H */ -- 1.9.2 -- 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/