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Subject[PATCH 2/2] arm64: mm: make pfn always valid with flat memory
Date
Make the pfn always valid when using flat memory.
If the reserved memory is not align to memblock-size,
there will be holes in zone.

This patch makes the memory in buddy always in the
array of mem-map.

Signed-off-by: Chen Feng <puck.chen@hisilicon.com>
Signed-off-by: Fu Jun <oliver.fu@hisilicon.com>
---
arch/arm64/mm/init.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
index ea989d8..0e1d5b7 100644
--- a/arch/arm64/mm/init.c
+++ b/arch/arm64/mm/init.c
@@ -306,7 +306,8 @@ static void __init free_unused_memmap(void)
struct memblock_region *reg;

for_each_memblock(memory, reg) {
- start = __phys_to_pfn(reg->base);
+ start = round_down(__phys_to_pfn(reg->base),
+ MAX_ORDER_NR_PAGES);

#ifdef CONFIG_SPARSEMEM
/*
@@ -327,8 +328,8 @@ static void __init free_unused_memmap(void)
* memmap entries are valid from the bank end aligned to
* MAX_ORDER_NR_PAGES.
*/
- prev_end = ALIGN(__phys_to_pfn(reg->base + reg->size),
- MAX_ORDER_NR_PAGES);
+ prev_end = round_up(__phys_to_pfn(reg->base + reg->size),
+ MAX_ORDER_NR_PAGES);
}

#ifdef CONFIG_SPARSEMEM
--
1.9.1
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