1 files changed, 17 insertions, 3 deletions

diff --git a/include/linux/percpu_counter.h b/include/linux/percpu_counter.h
index a7684a513994..8a7d510ffa9c 100644
--- a/include/linux/percpu_counter.h
+++ b/include/linux/percpu_counter.h
@@ -21,7 +21,7 @@ struct percpu_counter {
 #ifdef CONFIG_HOTPLUG_CPU
         struct list_head list;  /* All percpu_counters are on a list */
 #endif
-        s32 *counters;
+        s32 __percpu *counters;
 };
 
 extern int percpu_counter_batch;
@@ -40,6 +40,7 @@ void percpu_counter_destroy(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 percpu_counter_compare(struct percpu_counter *fbc, s64 rhs);
 
 static inline void percpu_counter_add(struct percpu_counter *fbc, s64 amount)
 {
@@ -98,8 +99,15 @@ static inline void percpu_counter_set(struct percpu_counter *fbc, s64 amount)
         fbc->count = amount;
 }
 
-#define __percpu_counter_add(fbc, amount, batch) \
-        percpu_counter_add(fbc, amount)
+static inline int percpu_counter_compare(struct percpu_counter *fbc, s64 rhs)
+{
+        if (fbc->count > rhs)
+                return 1;
+        else if (fbc->count < rhs)
+                return -1;
+        else
+                return 0;
+}
 
 static inline void
 percpu_counter_add(struct percpu_counter *fbc, s64 amount)
@@ -109,6 +117,12 @@ percpu_counter_add(struct percpu_counter *fbc, s64 amount)
         preempt_enable();
 }
 
+static inline void
+__percpu_counter_add(struct percpu_counter *fbc, s64 amount, s32 batch)
+{
+        percpu_counter_add(fbc, amount);
+}
+
 static inline s64 percpu_counter_read(struct percpu_counter *fbc)
 {
         return fbc->count;