fs/proc/kcore.c: In function 'kcore_update_ram':

fs/proc/kcore.c:144: error: 'max_low_pfn' undeclared (first use in this function)
fs/proc/kcore.c:144: error: (Each undeclared identifier is reported only once
fs/proc/kcore.c:144: error: for each function it appears in.)

Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: WANG Cong <xiyou.wangcong@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

fs/proc/kcore.c

@@ -16,6 +16,7 @@
 #include <linux/elf.h>
 #include <linux/elfcore.h>
 #include <linux/vmalloc.h>
+#include <linux/bootmem.h>
 #include <linux/highmem.h>
 #include <linux/init.h>
 #include <asm/uaccess.h>