[PATCH] arm: mm: use __pfn_to_section() to get mem_section

[Guixiong Wei]

Use __pfn_to_section() to get mem_section, instead of open-coding it.
No semantic changes.

Signed-off-by: Guixiong Wei <guixiong...@gmail.com>
---
 arch/arm64/mm/init.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
index e42727e3568e..d2df416b840e 100644
--- a/arch/arm64/mm/init.c
+++ b/arch/arm64/mm/init.c
@@ -272,7 +272,7 @@ int pfn_valid(unsigned long pfn)
        if (pfn_to_section_nr(pfn) >= NR_MEM_SECTIONS)
                return 0;
 
-       if (!valid_section(__nr_to_section(pfn_to_section_nr(pfn))))
+       if (!valid_section(__pfn_to_section(pfn)))
                return 0;
 #endif
        return memblock_is_map_memory(addr);
-- 
2.17.1