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-rw-r--r--include/linux/mmzone.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 1cc8412ac264..885cc9727001 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -54,6 +54,7 @@ enum zone_stat_item {
NR_SLAB, /* Pages used by slab allocator */
NR_PAGETABLE, /* used for pagetables */
NR_FILE_DIRTY,
+ NR_WRITEBACK,
NR_VM_ZONE_STAT_ITEMS };
struct per_cpu_pages {
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