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Subject[PATCH] mm/memblock: export max_pfn for kernel modules
Date
max_pfn is uesd to get the highest pfn in the system. Drivers like
drivers/iommu/mtk_iommu.c checks max_pfn to see if it should enable
its "4GB mode".

This patch exports the max_pfn symbol, so we can build the driver as
a kernel module.

Signed-off-by: Miles Chen <miles.chen@mediatek.com>
---
mm/memblock.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/mm/memblock.c b/mm/memblock.c
index c79ba6f9920c..3b2b21ecebb6 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -99,6 +99,7 @@ EXPORT_SYMBOL(contig_page_data);
unsigned long max_low_pfn;
unsigned long min_low_pfn;
unsigned long max_pfn;
+EXPORT_SYMBOL(max_pfn);
unsigned long long max_possible_pfn;

static struct memblock_region memblock_memory_init_regions[INIT_MEMBLOCK_REGIONS] __initdata_memblock;
--
2.18.0
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