linux-kernel - [PATCH AUTOSEL 4.20 16/72] riscv: fixup max_low_pfn with PFN

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Message-Id: <20190223210422.199966-16-sashal@kernel.org>
Date:   Sat, 23 Feb 2019 16:03:26 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Guo Ren <ren_guo@...ky.com>, Mao Han <mao_han@...ky.com>,
        Palmer Dabbelt <palmer@...ive.com>,
        Sasha Levin <sashal@...nel.org>,
        linux-riscv@...ts.infradead.org
Subject: [PATCH AUTOSEL 4.20 16/72] riscv: fixup max_low_pfn with PFN_DOWN.

From: Guo Ren <ren_guo@...ky.com>

[ Upstream commit 28198c4639b39899a728ac89aea29d2a7a72562f ]

max_low_pfn should be pfn_size not byte_size.

Signed-off-by: Guo Ren <ren_guo@...ky.com>
Signed-off-by: Mao Han <mao_han@...ky.com>
Signed-off-by: Palmer Dabbelt <palmer@...ive.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/riscv/kernel/setup.c | 2 +-
 arch/riscv/mm/init.c      | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/riscv/kernel/setup.c b/arch/riscv/kernel/setup.c
index 2c290e6aaa6e4..6d652826b5cbd 100644
--- a/arch/riscv/kernel/setup.c
+++ b/arch/riscv/kernel/setup.c
@@ -196,7 +196,7 @@ static void __init setup_bootmem(void)
 	BUG_ON(mem_size == 0);
 
 	set_max_mapnr(PFN_DOWN(mem_size));
-	max_low_pfn = memblock_end_of_DRAM();
+	max_low_pfn = PFN_DOWN(memblock_end_of_DRAM());
 
 #ifdef CONFIG_BLK_DEV_INITRD
 	setup_initrd();
diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c
index 1d9bfaff60bca..658ebf645f420 100644
--- a/arch/riscv/mm/init.c
+++ b/arch/riscv/mm/init.c
@@ -28,7 +28,8 @@ static void __init zone_sizes_init(void)
 	unsigned long max_zone_pfns[MAX_NR_ZONES] = { 0, };
 
 #ifdef CONFIG_ZONE_DMA32
-	max_zone_pfns[ZONE_DMA32] = PFN_DOWN(min(4UL * SZ_1G, max_low_pfn));
+	max_zone_pfns[ZONE_DMA32] = PFN_DOWN(min(4UL * SZ_1G,
+			(unsigned long) PFN_PHYS(max_low_pfn)));
 #endif
 	max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
 
-- 
2.19.1