From: Nicolas Pitre <nicolas.pitre@linaro.org>
Date: Fri, 1 Sep 2017 02:39:46 +0000 (+0100)
Subject: ARM: 8693/1: discard memblock arrays when possible
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=cf1b09908a231f3bb5e8ca15b76f05c4df91e292;p=openwrt%2Fstaging%2Fblogic.git

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 7888c9803eb0..979aac3e2fbf 100644
--- 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