Messages in this thread Patch in this message | | | From | Arnd Bergmann <> | Subject | [PATCH] ARM: avoid ARCH_MMAP_RND_BITS for NOMMU | Date | Fri, 27 Nov 2015 15:04:03 +0100 |
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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
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