From 636e645f1f2a5826beacd23548696f1655b0b5d8 Mon Sep 17 00:00:00 2001 From: Vladimir Murzin Date: Wed, 3 Jan 2018 10:09:33 +0100 Subject: ARM: 8740/1: NOMMU: Make sure we do not hold stale data in mem[] array adjust_lowmem_bounds() called twice which can lead to stalled data (i.e. subreg) value in mem[] array after the first call. Zero out mem[] array before we allocate MPU regions for memory. Fixes: 5c9d9a1b3a54 ("ARM: 8712/1: NOMMU: Use more MPU regions to cover memory") Signed-off-by: Vladimir Murzin Signed-off-by: Russell King --- arch/arm/mm/pmsa-v7.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm/mm/pmsa-v7.c b/arch/arm/mm/pmsa-v7.c index 650998912c1c..e2853bfff74e 100644 --- a/arch/arm/mm/pmsa-v7.c +++ b/arch/arm/mm/pmsa-v7.c @@ -6,6 +6,7 @@ #include #include +#include #include #include @@ -296,6 +297,7 @@ void __init adjust_lowmem_bounds_mpu(void) } } + memset(mem, 0, sizeof(mem)); num = allocate_region(mem_start, specified_mem_size, mem_max_regions, mem); for (i = 0; i < num; i++) { -- cgit