lib: make percpu_counter_add take s64

percpu_counter is a s64 counter, make _add consitent.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

include/linux/percpu_counter.h

@@ -32,10 +32,10 @@ struct percpu_counter {
 
 void percpu_counter_init(struct percpu_counter *fbc, s64 amount);
 void percpu_counter_destroy(struct percpu_counter *fbc);
-void __percpu_counter_add(struct percpu_counter *fbc, s32 amount, s32 batch);
+void __percpu_counter_add(struct percpu_counter *fbc, s64 amount, s32 batch);
 s64 percpu_counter_sum(struct percpu_counter *fbc);
 
-static inline void percpu_counter_add(struct percpu_counter *fbc, s32 amount)
+static inline void percpu_counter_add(struct percpu_counter *fbc, s64 amount)
 {
 	__percpu_counter_add(fbc, amount, FBC_BATCH);
 }
@@ -79,7 +79,7 @@ static inline void percpu_counter_destroy(struct percpu_counter *fbc)
 	percpu_counter_add(fbc, amount)
 
 static inline void
-percpu_counter_add(struct percpu_counter *fbc, s32 amount)
+percpu_counter_add(struct percpu_counter *fbc, s64 amount)
 {
 	preempt_disable();
 	fbc->count += amount;

lib/percpu_counter.c

@@ -14,9 +14,9 @@ static LIST_HEAD(percpu_counters);
 static DEFINE_MUTEX(percpu_counters_lock);
 #endif
 
-void __percpu_counter_add(struct percpu_counter *fbc, s32 amount, s32 batch)
+void __percpu_counter_add(struct percpu_counter *fbc, s64 amount, s32 batch)
 {
-	long count;
+	s64 count;
 	s32 *pcount;
 	int cpu = get_cpu();