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-rw-r--r--arch/arm/kernel/setup.c6
-rw-r--r--arch/arm/mm/mmu.c9
2 files changed, 12 insertions, 3 deletions
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index 8a8051cf57d1..f4e54503afa9 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -1093,8 +1093,14 @@ void __init setup_arch(char **cmdline_p)
setup_dma_zone(mdesc);
xen_early_init();
efi_init();
+ /*
+ * Make sure the calculation for lowmem/highmem is set appropriately
+ * before reserving/allocating any mmeory
+ */
adjust_lowmem_bounds();
arm_memblock_init(mdesc);
+ /* Memory may have been removed so recalculate the bounds. */
+ adjust_lowmem_bounds();
early_ioremap_reset();
diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index b8f70a3bb7f8..5cbfd9f86412 100644
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -1157,6 +1157,7 @@ void __init adjust_lowmem_bounds(void)
phys_addr_t memblock_limit = 0;
u64 vmalloc_limit;
struct memblock_region *reg;
+ phys_addr_t lowmem_limit = 0;
/*
* Let's use our own (unoptimized) equivalent of __pa() that is
@@ -1172,14 +1173,14 @@ void __init adjust_lowmem_bounds(void)
phys_addr_t block_end = reg->base + reg->size;
if (reg->base < vmalloc_limit) {
- if (block_end > arm_lowmem_limit)
+ if (block_end > lowmem_limit)
/*
* Compare as u64 to ensure vmalloc_limit does
* not get truncated. block_end should always
* fit in phys_addr_t so there should be no
* issue with assignment.
*/
- arm_lowmem_limit = min_t(u64,
+ lowmem_limit = min_t(u64,
vmalloc_limit,
block_end);
@@ -1200,12 +1201,14 @@ void __init adjust_lowmem_bounds(void)
if (!IS_ALIGNED(block_start, PMD_SIZE))
memblock_limit = block_start;
else if (!IS_ALIGNED(block_end, PMD_SIZE))
- memblock_limit = arm_lowmem_limit;
+ memblock_limit = lowmem_limit;
}
}
}
+ arm_lowmem_limit = lowmem_limit;
+
high_memory = __va(arm_lowmem_limit - 1) + 1;
/*