From: Geert Uytterhoeven <geert@linux-m68k.org>
Date: Sun, 15 Nov 2015 10:34:20 +0000 (+0100)
Subject: m68k/mm: motorola - Add missing initialization of max_pfn
X-Git-Tag: v4.4-rc3~4^2~4
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=79ae4fa5c0e1bc8000c39d3a78cb67828906a0e5;p=karo-tx-linux.git

m68k/mm: motorola - Add missing initialization of max_pfn

If max_pfn is not initialized, the various /proc/kpage* files are empty,
and selftests/vm/mlock2-tests will fail. max_pfn is also used by the
block layer to calculate DMA masks.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Greg Ungerer <gerg@uclinux.org>
---

diff --git a/arch/m68k/mm/motorola.c b/arch/m68k/mm/motorola.c
index b958916e5eac..8f37fdd80be9 100644
--- a/arch/m68k/mm/motorola.c
+++ b/arch/m68k/mm/motorola.c
@@ -250,7 +250,7 @@ void __init paging_init(void)
 	high_memory = phys_to_virt(max_addr);
 
 	min_low_pfn = availmem >> PAGE_SHIFT;
-	max_low_pfn = max_addr >> PAGE_SHIFT;
+	max_pfn = max_low_pfn = max_addr >> PAGE_SHIFT;
 
 	for (i = 0; i < m68k_num_memory; i++) {
 		addr = m68k_memory[i].addr;