lkml.org 
[lkml]   [2015]   [Nov]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] ARM: avoid ARCH_MMAP_RND_BITS for NOMMU
Date
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 <arnd@arndb.de>
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


\
 
 \ /
  Last update: 2015-11-27 15:21    [W:0.593 / U:0.336 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site