ARM: 8693/1: discard memblock arrays when possible

On ARM the generic pfn_valid() version is used with some configurations
such as SA1100 based devices. In that case the memblock arrays are no
longer used after boot and can be discarded.

Signed-off-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 7888c98..979aac3 100644 (file)
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -2,6 +2,7 @@ config ARM
        bool
        default y
        select ARCH_CLOCKSOURCE_DATA
+       select ARCH_DISCARD_MEMBLOCK if !HAVE_ARCH_PFN_VALID
        select ARCH_HAS_DEBUG_VIRTUAL
        select ARCH_HAS_DEVMEM_IS_ALLOWED
        select ARCH_HAS_ELF_RANDOMIZE