perf: Fix comments in include/linux/perf_event.h

[cascardo/linux.git] / include / linux / percpu_counter.h

diff --git a/include/linux/percpu_counter.h b/include/linux/percpu_counter.h
index 46f6ba5..5edc901 100644 (file)
--- a/include/linux/percpu_counter.h
+++ b/include/linux/percpu_counter.h
@@ -75,7 +75,7 @@ static inline s64 percpu_counter_read_positive(struct percpu_counter *fbc)
        barrier();              /* Prevent reloads of fbc->count */
        if (ret >= 0)
                return ret;
-       return 1;
+       return 0;
 }
 
 static inline int percpu_counter_initialized(struct percpu_counter *fbc)
@@ -133,6 +133,10 @@ static inline s64 percpu_counter_read(struct percpu_counter *fbc)
        return fbc->count;
 }
 
+/*
+ * percpu_counter is intended to track positive numbers. In the UP case the
+ * number should never be negative.
+ */
 static inline s64 percpu_counter_read_positive(struct percpu_counter *fbc)
 {
        return fbc->count;