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-rw-r--r--include/linux/genhd.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/genhd.h b/include/linux/genhd.h
index 6cb8a5789668..19f36fa10995 100644
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h
@@ -353,6 +353,10 @@ static inline void free_part_stats(struct hd_struct *part)
#endif /* CONFIG_SMP */
+#define part_stat_read_accum(part, field) \
+ (part_stat_read(part, field[0]) + \
+ part_stat_read(part, field[1]))
+
#define part_stat_add(cpu, part, field, addnd) do { \
__part_stat_add((cpu), (part), field, addnd); \
if ((part)->partno) \