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authorJiang Liu <liuj97@gmail.com>2013-07-03 15:04:23 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-07-03 16:07:38 -0700
commitfccc998771043db1613509b26c18b3d7f071e668 (patch)
treec917d6508d4194a4a50796ccb36614e3fe56da7e /include/linux/mm.h
parent1895418189e08c1d1eec4fbdb5fb41d793f57ba5 (diff)
mm: introduce helper function set_max_mapnr()
Introduce a 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@huawei.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Mauro Carvalho Chehab <mchehab@redhat.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/mm.h')
-rw-r--r--include/linux/mm.h9
1 files changed, 8 insertions, 1 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h
index e550a1773a9e..b87681adf0ba 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;