linux-kernel - [PATCH] ARC: Use max_high_pfn as a HIGHMEM zone border

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Message-Id: <20210426101004.42695-1-isaev@synopsys.com>
Date:   Mon, 26 Apr 2021 13:10:04 +0300
From:   Vladimir Isaev <Vladimir.Isaev@...opsys.com>
To:     linux-snps-arc@...ts.infradead.org
Cc:     linux-arch@...r.kernel.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, rppt@...ux.ibm.com,
        Vladimir Isaev <Vladimir.Isaev@...opsys.com>
Subject: [PATCH] ARC: Use max_high_pfn as a HIGHMEM zone border

Commit 4af22ded0ecf ("arc: fix memory initialization for systems with two
memory banks") fixed highmem, but not for PAE case when highmem is
actually bigger than lowmem.

Signed-off-by: Vladimir Isaev <isaev@...opsys.com>
Cc: Mike Rapoport <rppt@...ux.ibm.com>
---
 arch/arc/mm/init.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arc/mm/init.c b/arch/arc/mm/init.c
index ce07e697916c..59bad6f94105 100644
--- a/arch/arc/mm/init.c
+++ b/arch/arc/mm/init.c
@@ -157,7 +157,7 @@ void __init setup_arch_memory(void)
 	min_high_pfn = PFN_DOWN(high_mem_start);
 	max_high_pfn = PFN_DOWN(high_mem_start + high_mem_sz);
 
-	max_zone_pfn[ZONE_HIGHMEM] = min_low_pfn;
+	max_zone_pfn[ZONE_HIGHMEM] = max_high_pfn;
 
 	high_memory = (void *)(min_high_pfn << PAGE_SHIFT);
 
-- 
2.16.2