[PATCH] percpu_counters: create lib/percpu_counter.c

- Move percpu_counter routines from mm/swap.c to lib/percpu_counter.c

Signed-off-by: Ravikiran Thirumalai <kiran@scalex86.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 0 insertions, 42 deletions

diff --git a/mm/swap.c b/mm/swap.c
index 88895c249bc9..03ae2076f92f 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -480,48 +480,6 @@ static int cpu_swap_callback(struct notifier_block *nfb,
 #endif /* CONFIG_HOTPLUG_CPU */
 #endif /* CONFIG_SMP */
 
-#ifdef CONFIG_SMP
-void percpu_counter_mod(struct percpu_counter *fbc, long amount)
-{
-        long count;
-        long *pcount;
-        int cpu = get_cpu();
-
-        pcount = per_cpu_ptr(fbc->counters, cpu);
-        count = *pcount + amount;
-        if (count >= FBC_BATCH || count <= -FBC_BATCH) {
-                spin_lock(&fbc->lock);
-                fbc->count += count;
-                *pcount = 0;
-                spin_unlock(&fbc->lock);
-        } else {
-                *pcount = count;
-        }
-        put_cpu();
-}
-EXPORT_SYMBOL(percpu_counter_mod);
-
-/*
- * Add up all the per-cpu counts, return the result.  This is a more accurate
- * but much slower version of percpu_counter_read_positive()
- */
-long percpu_counter_sum(struct percpu_counter *fbc)
-{
-        long ret;
-        int cpu;
-
-        spin_lock(&fbc->lock);
-        ret = fbc->count;
-        for_each_possible_cpu(cpu) {
-                long *pcount = per_cpu_ptr(fbc->counters, cpu);
-                ret += *pcount;
-        }
-        spin_unlock(&fbc->lock);
-        return ret < 0 ? 0 : ret;
-}
-EXPORT_SYMBOL(percpu_counter_sum);
-#endif
-
 /*
  * Perform any setup for the swap system
  */