Merge commit 'v4.9-rc5' into next

1 files changed, 13 insertions, 0 deletions

diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c
index 0d57909d9026..f66e5ce505b2 100644
--- a/arch/mips/kernel/setup.c
+++ b/arch/mips/kernel/setup.c
@@ -368,6 +368,19 @@ static void __init bootmem_init(void)
 		end = PFN_DOWN(boot_mem_map.map[i].addr
 				+ boot_mem_map.map[i].size);
 
+#ifndef CONFIG_HIGHMEM
+		/*
+		 * Skip highmem here so we get an accurate max_low_pfn if low
+		 * memory stops short of high memory.
+		 * If the region overlaps HIGHMEM_START, end is clipped so
+		 * max_pfn excludes the highmem portion.
+		 */
+		if (start >= PFN_DOWN(HIGHMEM_START))
+			continue;
+		if (end > PFN_DOWN(HIGHMEM_START))
+			end = PFN_DOWN(HIGHMEM_START);
+#endif
+
 		if (end > max_low_pfn)
 			max_low_pfn = end;
 		if (start < min_low_pfn)