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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2007-10-17 02:25:44 -0400
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-17 11:42:44 -0400
commit3a587f47b82f96f19318c036e7b979fcd5c3848f (patch)
tree84b3254a7ea7524784f7e262d651cc332b3b0063 /lib/percpu_counter.c
parent20e89767096392a2cb2404437d3d181b8827af38 (diff)
lib: percpu_counter_set
Provide a method to set a percpu counter to a specified value. 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>
Diffstat (limited to 'lib/percpu_counter.c')
-rw-r--r--lib/percpu_counter.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/lib/percpu_counter.c b/lib/percpu_counter.c
index f7ac68c4c375..c9708db9b8d3 100644
--- a/lib/percpu_counter.c
+++ b/lib/percpu_counter.c
@@ -14,6 +14,20 @@ static LIST_HEAD(percpu_counters);
14static DEFINE_MUTEX(percpu_counters_lock); 14static DEFINE_MUTEX(percpu_counters_lock);
15#endif 15#endif
16 16
17void percpu_counter_set(struct percpu_counter *fbc, s64 amount)
18{
19 int cpu;
20
21 spin_lock(&fbc->lock);
22 for_each_possible_cpu(cpu) {
23 s32 *pcount = per_cpu_ptr(fbc->counters, cpu);
24 *pcount = 0;
25 }
26 fbc->count = amount;
27 spin_unlock(&fbc->lock);
28}
29EXPORT_SYMBOL(percpu_counter_set);
30
17void __percpu_counter_add(struct percpu_counter *fbc, s64 amount, s32 batch) 31void __percpu_counter_add(struct percpu_counter *fbc, s64 amount, s32 batch)
18{ 32{
19 s64 count; 33 s64 count;