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authorArnd Bergmann <arnd@arndb.de>2015-01-28 17:58:33 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2015-01-29 15:23:31 +0000
commitfba289054f24d2550f47a1413e1ccc24f4165560 (patch)
tree08d4b0617613092f1836ac0bfc32b65fc3f8daec
parented46092518aaed9e5266f8dd87ac12bf18cfc8e8 (diff)
ARM: 8298/1: ARM_KERNMEM_PERMS only works with MMU enabled
The recently added ARM_KERNMEM_PERMS feature works by manipulating the kernel page tables, which obviously requires an MMU. Trying to enable this feature when the MMU is disabled results in a lot of compile errors in mm/init.c, so let's add a Kconfig dependency to avoid that case. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
-rw-r--r--arch/arm/mm/Kconfig1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig
index 03823e784f63..c43c71455566 100644
--- a/arch/arm/mm/Kconfig
+++ b/arch/arm/mm/Kconfig
@@ -1012,6 +1012,7 @@ config ARCH_SUPPORTS_BIG_ENDIAN
config ARM_KERNMEM_PERMS
bool "Restrict kernel memory permissions"
+ depends on MMU
help
If this is set, kernel memory other than kernel text (and rodata)
will be made non-executable. The tradeoff is that each region is