[PATCH 2/2] arm64: mm: enable CONFIG_HOLES_IN_ZONE for NUMA

From: Ard Biesheuvel
Date: Wed Dec 14 2016 - 04:12:26 EST

The NUMA code may get confused by the presence of NOMAP regions within
zones, resulting in spurious BUG() checks where the node id deviates
from the containing zone's node id.

Since the kernel has no business reasoning about node ids of pages it
does not own in the first place, enable CONFIG_HOLES_IN_ZONE to ensure
that such pages are disregarded.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx>
arch/arm64/Kconfig | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 111742126897..0472afe64d55 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -614,6 +614,10 @@ config NEED_PER_CPU_EMBED_FIRST_CHUNK
def_bool y
depends on NUMA

+ def_bool y
+ depends on NUMA
source kernel/Kconfig.preempt
source kernel/Kconfig.hz