Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751877AbdIKM3U (ORCPT ); Mon, 11 Sep 2017 08:29:20 -0400 Received: from baptiste.telenet-ops.be ([195.130.132.51]:35188 "EHLO baptiste.telenet-ops.be" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750991AbdIKM3S (ORCPT ); Mon, 11 Sep 2017 08:29:18 -0400 From: Geert Uytterhoeven To: Bjorn Helgaas Cc: Arnd Bergmann , Alex Williamson , Joerg Roedel , linux-pci@vger.kernel.org, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, Geert Uytterhoeven Subject: [PATCH] pci: Add dummy for pci_acs_enabled() if CONFIG_PCI=n to fix iommmu build Date: Mon, 11 Sep 2017 14:29:15 +0200 Message-Id: <1505132955-9517-1-git-send-email-geert@linux-m68k.org> X-Mailer: git-send-email 2.7.4 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1350 Lines: 38 If CONFIG_PCI=n, and gcc (e.g. 4.1.2) decides not to inline get_pci_function_alias_group(), the build fails with: drivers/iommu/iommu.o: In function `get_pci_function_alias_group': iommu.c:(.text+0xfdc): undefined reference to `pci_acs_enabled' Due to the various dummies for PCI calls in the CONFIG_PCI=n case, pci_acs_enabled() isn't actually ever called, but not all versions of gcc are smart enough to realize that. While explicitly marking get_pci_function_alias_group() inline would fix the build, this would inflate the code for the CONFIG_PCI=y case, as get_pci_function_alias_group() is a not-so-small function called from two places. Hence fix the issue by introducing a dummy for pci_acs_enabled() instead. Signed-off-by: Geert Uytterhoeven --- include/linux/pci.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/include/linux/pci.h b/include/linux/pci.h index f68c58a93dd045b9..f4f8ee5a7362e982 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -1685,6 +1685,8 @@ static inline int pci_get_new_domain_nr(void) { return -ENOSYS; } #define dev_is_pci(d) (false) #define dev_is_pf(d) (false) +static inline bool pci_acs_enabled(struct pci_dev *pdev, u16 acs_flags) +{ return false; } #endif /* CONFIG_PCI */ /* Include architecture-dependent settings and functions */ -- 2.7.4