[PATCH] ARM: don't discard memblock for kexec

[Arnd Bergmann]

Discarding the memblock arrays usually works, but causes problems
with kexec, as pointed out by this kbuild warning:

WARNING: vmlinux.o(.text+0x7c60): Section mismatch in reference from the 
function machine_kexec_prepare() to the function 
.meminit.text:memblock_is_region_memory()

This lets us keep the memblock structures around whenever kexec
is enabled, but otherwise still drops them.

Fixes: cf1b09908a23 ("ARM: 8693/1: discard memblock arrays when possible")
Signed-off-by: Arnd Bergmann <a...@arndb.de>
---
 arch/arm/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 75b8c7e79ebc..90922a090501 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -2,7 +2,7 @@ config ARM
        bool
        default y
        select ARCH_CLOCKSOURCE_DATA
-       select ARCH_DISCARD_MEMBLOCK if !HAVE_ARCH_PFN_VALID
+       select ARCH_DISCARD_MEMBLOCK if !HAVE_ARCH_PFN_VALID && !KEXEC
        select ARCH_HAS_DEBUG_VIRTUAL
        select ARCH_HAS_DEVMEM_IS_ALLOWED
        select ARCH_HAS_ELF_RANDOMIZE
-- 
2.9.0