mm/vmstat.c: uninline node_page_state()
With x86_64 (config http://ozlabs.org/~akpm/config-akpm2.txt) and old gcc
(4.4.4), drivers/base/node.c:node_read_meminfo() is using 2344 bytes of
stack. Uninlining node_page_state() reduces this to 440 bytes.
The stack consumption issue is fixed by newer gcc (4.8.4) however with
that compiler this patch reduces the node.o text size from 7314 bytes to
4578.
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/mm/vmstat.c b/mm/vmstat.c
index fbf1448..ffcb4f5 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -591,6 +591,28 @@
else
__inc_zone_state(z, NUMA_OTHER);
}
+
+/*
+ * Determine the per node value of a stat item.
+ */
+unsigned long node_page_state(int node, enum zone_stat_item item)
+{
+ struct zone *zones = NODE_DATA(node)->node_zones;
+
+ return
+#ifdef CONFIG_ZONE_DMA
+ zone_page_state(&zones[ZONE_DMA], item) +
+#endif
+#ifdef CONFIG_ZONE_DMA32
+ zone_page_state(&zones[ZONE_DMA32], item) +
+#endif
+#ifdef CONFIG_HIGHMEM
+ zone_page_state(&zones[ZONE_HIGHMEM], item) +
+#endif
+ zone_page_state(&zones[ZONE_NORMAL], item) +
+ zone_page_state(&zones[ZONE_MOVABLE], item);
+}
+
#endif
#ifdef CONFIG_COMPACTION