-void percpu_counter_mod(struct percpu_counter *fbc, s32 amount);
-s64 percpu_counter_sum(struct percpu_counter *fbc);
+void percpu_counter_set(struct percpu_counter *fbc, s64 amount);
+void __percpu_counter_add(struct percpu_counter *fbc, s64 amount, s32 batch);
+s64 __percpu_counter_sum(struct percpu_counter *fbc, int set);
+
+static inline void percpu_counter_add(struct percpu_counter *fbc, s64 amount)
+{
+ __percpu_counter_add(fbc, amount, FBC_BATCH);
+}
+
+static inline s64 percpu_counter_sum_positive(struct percpu_counter *fbc)
+{
+ s64 ret = __percpu_counter_sum(fbc, 0);
+ return ret < 0 ? 0 : ret;
+}
+
+static inline s64 percpu_counter_sum_and_set(struct percpu_counter *fbc)
+{
+ return __percpu_counter_sum(fbc, 1);
+}
+
+
+static inline s64 percpu_counter_sum(struct percpu_counter *fbc)
+{
+ return __percpu_counter_sum(fbc, 0);
+}