Introduce an helper function set_max_mapnr() to set global variable
max_mapnr.
Also unify condition compilation for max_mapnr with
CONFIG_NEED_MULTIPLE_NODES instead of CONFIG_DISCONTIGMEM.
Signed-off-by: Jiang Liu <jiang.liu@xxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx>
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Cc: Mark Brown <broonie@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
Cc: linux-mm@xxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
---
include/linux/mm.h | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 7e39aa1..bde812e 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -25,8 +25,15 @@ struct file_ra_state;
struct user_struct;
struct writeback_control;
-#ifndef CONFIG_DISCONTIGMEM /* Don't use mapnrs, do it properly */
+#ifndef CONFIG_NEED_MULTIPLE_NODES /* Don't use mapnrs, do it properly */
extern unsigned long max_mapnr;
+
+static inline void set_max_mapnr(unsigned long limit)
+{
+ max_mapnr = limit;
+}
+#else
+static inline void set_max_mapnr(unsigned long limit) { }
#endif
extern unsigned long totalram_pages;
--
1.8.1.2
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