linux-kernel - [PATCH] arm64/mm: Use CONT_PMD_SHIFT for ARM64_MEMSTART

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Date:   Mon, 14 Jun 2021 15:12:35 +0530
From:   Anshuman Khandual <anshuman.khandual@....com>
To:     linux-arm-kernel@...ts.infradead.org
Cc:     Anshuman Khandual <anshuman.khandual@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH] arm64/mm: Use CONT_PMD_SHIFT for ARM64_MEMSTART_SHIFT

ARM64_MEMSTART_SIZE needs to be aligned with CONT_PMD_SIZE on 16K page size
config. Hence just directly use CONT_PMD_SHIFT.

Cc: Catalin Marinas <catalin.marinas@....com>
Cc: Will Deacon <will@...nel.org>
Cc: Mark Rutland <mark.rutland@....com>
Cc: linux-arm-kernel@...ts.infradead.org
Cc: linux-kernel@...r.kernel.org
Signed-off-by: Anshuman Khandual <anshuman.khandual@....com>
---
This applies on v5.13-rc6.

 arch/arm64/include/asm/kernel-pgtable.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/include/asm/kernel-pgtable.h b/arch/arm64/include/asm/kernel-pgtable.h
index 88b8d681ad91..a848da2b4d90 100644
--- a/arch/arm64/include/asm/kernel-pgtable.h
+++ b/arch/arm64/include/asm/kernel-pgtable.h
@@ -125,7 +125,7 @@
 #if defined(CONFIG_ARM64_4K_PAGES)
 #define ARM64_MEMSTART_SHIFT		PUD_SHIFT
 #elif defined(CONFIG_ARM64_16K_PAGES)
-#define ARM64_MEMSTART_SHIFT		(PMD_SHIFT + 5)
+#define ARM64_MEMSTART_SHIFT		CONT_PMD_SHIFT
 #else
 #define ARM64_MEMSTART_SHIFT		PMD_SHIFT
 #endif
-- 
2.20.1