Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=3a587f47b82f96f19318c036e7b979fcd5c3848f
Commit:     3a587f47b82f96f19318c036e7b979fcd5c3848f
Parent:     20e89767096392a2cb2404437d3d181b8827af38
Author:     Peter Zijlstra <[EMAIL PROTECTED]>
AuthorDate: Tue Oct 16 23:25:44 2007 -0700
Committer:  Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Wed Oct 17 08:42:44 2007 -0700

    lib: percpu_counter_set
    
    Provide a method to set a percpu counter to a specified value.
    
    Signed-off-by: Peter Zijlstra <[EMAIL PROTECTED]>
    Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
    Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
 include/linux/percpu_counter.h |    6 ++++++
 lib/percpu_counter.c           |   14 ++++++++++++++
 2 files changed, 20 insertions(+), 0 deletions(-)

diff --git a/include/linux/percpu_counter.h b/include/linux/percpu_counter.h
index e8fa2da..2da92e8 100644
--- a/include/linux/percpu_counter.h
+++ b/include/linux/percpu_counter.h
@@ -32,6 +32,7 @@ struct percpu_counter {
 
 void percpu_counter_init(struct percpu_counter *fbc, s64 amount);
 void percpu_counter_destroy(struct percpu_counter *fbc);
+void percpu_counter_set(struct percpu_counter *fbc, s64 amount);
 void __percpu_counter_add(struct percpu_counter *fbc, s64 amount, s32 batch);
 s64 percpu_counter_sum(struct percpu_counter *fbc);
 
@@ -75,6 +76,11 @@ static inline void percpu_counter_destroy(struct 
percpu_counter *fbc)
 {
 }
 
+static inline void percpu_counter_set(struct percpu_counter *fbc, s64 amount)
+{
+       fbc->count = amount;
+}
+
 #define __percpu_counter_add(fbc, amount, batch) \
        percpu_counter_add(fbc, amount)
 
diff --git a/lib/percpu_counter.c b/lib/percpu_counter.c
index f7ac68c..c9708db 100644
--- a/lib/percpu_counter.c
+++ b/lib/percpu_counter.c
@@ -14,6 +14,20 @@ static LIST_HEAD(percpu_counters);
 static DEFINE_MUTEX(percpu_counters_lock);
 #endif
 
+void percpu_counter_set(struct percpu_counter *fbc, s64 amount)
+{
+       int cpu;
+
+       spin_lock(&fbc->lock);
+       for_each_possible_cpu(cpu) {
+               s32 *pcount = per_cpu_ptr(fbc->counters, cpu);
+               *pcount = 0;
+       }
+       fbc->count = amount;
+       spin_unlock(&fbc->lock);
+}
+EXPORT_SYMBOL(percpu_counter_set);
+
 void __percpu_counter_add(struct percpu_counter *fbc, s64 amount, s32 batch)
 {
        s64 count;
-
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