From mboxrd@z Thu Jan 1 00:00:00 1970 From: Arnd Bergmann Subject: [PATCH] ARM: avoid ARCH_MMAP_RND_BITS for NOMMU Date: Fri, 27 Nov 2015 15:04:03 +0100 Message-ID: <2874133.c4GDUf0t6t@wuerfel> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7Bit Return-path: Received: from mout.kundenserver.de ([212.227.17.10]:49688 "EHLO mout.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751165AbbK0OEb (ORCPT ); Fri, 27 Nov 2015 09:04:31 -0500 Sender: linux-arch-owner@vger.kernel.org List-ID: To: Andrew Morton Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Daniel Cashman , linux-arch@vger.kernel.org ARM kernels with MMU disabled fail to build because of CONFIG_ARCH_MMAP_RND_BITS: kernel/built-in.o:(.data+0x754): undefined reference to `mmap_rnd_bits' kernel/built-in.o:(.data+0x76c): undefined reference to `mmap_rnd_bits_min' kernel/built-in.o:(.data+0x770): undefined reference to `mmap_rnd_bits_max' This changes the newly added line to only select this allow for MMU-enabled kernels. Signed-off-by: Arnd Bergmann Fixes: 14570b3fd31a ("arm: mm: support ARCH_MMAP_RND_BITS") --- Found on yesterday's linux-next with ARM randconfig. The commit that introduced this is currently in Andrew's tree. If you don't already have a fix, please either apply this patch on top, or fold it into the original patch. diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index b64f64d124c4..5a0957e3ea36 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -34,7 +34,7 @@ config ARM select HAVE_ARCH_BITREVERSE if (CPU_32v7M || CPU_32v7) && !CPU_32v6 select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL && !CPU_ENDIAN_BE32 && MMU select HAVE_ARCH_KGDB if !CPU_ENDIAN_BE32 && MMU - select HAVE_ARCH_MMAP_RND_BITS + select HAVE_ARCH_MMAP_RND_BITS if MMU select HAVE_ARCH_SECCOMP_FILTER if (AEABI && !OABI_COMPAT) select HAVE_ARCH_TRACEHOOK select HAVE_BPF_JIT