linux-kernel - [PATCH v2] arm: mm: use __pfn_to_section() to get mem

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Message-Id: <20200430161858.11379-1-guixiongwei@gmail.com>
Date:   Fri,  1 May 2020 06:18:58 +1400
From:   Guixiong Wei <guixiongwei@...il.com>
To:     catalin.marinas@....com, will@...nel.org
Cc:     nsaenzjulienne@...e.de, steve.capper@....com,
        akpm@...ux-foundation.org, guro@...com, tglx@...utronix.de,
        rppt@...ux.ibm.com, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, Guixiong Wei <guixiongwei@...il.com>
Subject: [PATCH v2] arm: mm: use __pfn_to_section() to get mem_section

__pfn_to_section() helper which already wraps around
__nr_to_section(pfn_to_section_nr(pfn)), should be used
directly instead.

Signed-off-by: Guixiong Wei <guixiongwei@...il.com>
---

v1 -> v2
- reword the commit message.

---
 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