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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>
This commit is contained in:
Arnd Bergmann 2015-01-28 17:58:33 +01:00 committed by Russell King
parent ed46092518
commit fba289054f
1 changed files with 1 additions and 0 deletions
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arch/arm/mm/Kconfig
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@ -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