fedora core 6 1.2949 + vserver 2.2.0

[linux-2.6.git] / include / linux / percpu_counter.h

diff --git a/include/linux/percpu_counter.h b/include/linux/percpu_counter.h
index 6825255..f5aa593 100644 (file)
--- a/include/linux/percpu_counter.h
+++ b/include/linux/percpu_counter.h
@@ -6,18 +6,18 @@
  * WARNING: these things are HUGE.  4 kbytes per counter on 32-way P4.
  */
 
-#include <linux/config.h>
 #include <linux/spinlock.h>
 #include <linux/smp.h>
 #include <linux/threads.h>
 #include <linux/percpu.h>
+#include <linux/types.h>
 
 #ifdef CONFIG_SMP
 
 struct percpu_counter {
        spinlock_t lock;
-       long count;
-       long *counters;
+       s64 count;
+       s32 *counters;
 };
 
 #if NR_CPUS >= 16
@@ -26,11 +26,11 @@ struct percpu_counter {
 #define FBC_BATCH      (NR_CPUS*4)
 #endif
 
-static inline void percpu_counter_init(struct percpu_counter *fbc)
+static inline void percpu_counter_init(struct percpu_counter *fbc, s64 amount)
 {
        spin_lock_init(&fbc->lock);
-       fbc->count = 0;
-       fbc->counters = alloc_percpu(long);
+       fbc->count = amount;
+       fbc->counters = alloc_percpu(s32);
 }
 
 static inline void percpu_counter_destroy(struct percpu_counter *fbc)
@@ -38,10 +38,10 @@ static inline void percpu_counter_destroy(struct percpu_counter *fbc)
        free_percpu(fbc->counters);
 }
 
-void percpu_counter_mod(struct percpu_counter *fbc, long amount);
-long percpu_counter_sum(struct percpu_counter *fbc);
+void percpu_counter_mod(struct percpu_counter *fbc, s32 amount);
+s64 percpu_counter_sum(struct percpu_counter *fbc);
 
-static inline long percpu_counter_read(struct percpu_counter *fbc)
+static inline s64 percpu_counter_read(struct percpu_counter *fbc)
 {
        return fbc->count;
 }
@@ -49,13 +49,14 @@ static inline long percpu_counter_read(struct percpu_counter *fbc)
 /*
  * It is possible for the percpu_counter_read() to return a small negative
  * number for some counter which should never be negative.
+ *
  */
-static inline long percpu_counter_read_positive(struct percpu_counter *fbc)
+static inline s64 percpu_counter_read_positive(struct percpu_counter *fbc)
 {
-       long ret = fbc->count;
+       s64 ret = fbc->count;
 
        barrier();              /* Prevent reloads of fbc->count */
-       if (ret > 0)
+       if (ret >= 0)
                return ret;
        return 1;
 }
@@ -63,12 +64,12 @@ static inline long percpu_counter_read_positive(struct percpu_counter *fbc)
 #else
 
 struct percpu_counter {
-       long count;
+       s64 count;
 };
 
-static inline void percpu_counter_init(struct percpu_counter *fbc)
+static inline void percpu_counter_init(struct percpu_counter *fbc, s64 amount)
 {
-       fbc->count = 0;
+       fbc->count = amount;
 }
 
 static inline void percpu_counter_destroy(struct percpu_counter *fbc)
@@ -76,24 +77,24 @@ static inline void percpu_counter_destroy(struct percpu_counter *fbc)
 }
 
 static inline void
-percpu_counter_mod(struct percpu_counter *fbc, long amount)
+percpu_counter_mod(struct percpu_counter *fbc, s32 amount)
 {
        preempt_disable();
        fbc->count += amount;
        preempt_enable();
 }
 
-static inline long percpu_counter_read(struct percpu_counter *fbc)
+static inline s64 percpu_counter_read(struct percpu_counter *fbc)
 {
        return fbc->count;
 }
 
-static inline long percpu_counter_read_positive(struct percpu_counter *fbc)
+static inline s64 percpu_counter_read_positive(struct percpu_counter *fbc)
 {
        return fbc->count;
 }
 
-static inline long percpu_counter_sum(struct percpu_counter *fbc)
+static inline s64 percpu_counter_sum(struct percpu_counter *fbc)
 {
        return percpu_counter_read_positive(fbc);
 }