Introduce accessor 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....@huawei.com>
---
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 f9f9f3c..497ebaf 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;
--
1.7.9.5
--
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