Provide a method to set a percpu counter to a specified value. Signed-off-by: Peter Zijlstra --- include/linux/percpu_counter.h | 6 ++++++ lib/percpu_counter.c | 13 +++++++++++++ 2 files changed, 19 insertions(+) Index: linux-2.6/include/linux/percpu_counter.h =================================================================== --- linux-2.6.orig/include/linux/percpu_counter.h 2007-05-02 12:44:13.000000000 +0200 +++ linux-2.6/include/linux/percpu_counter.h 2007-05-02 19:06:44.000000000 +0200 @@ -38,6 +38,7 @@ static inline void percpu_counter_destro free_percpu(fbc->counters); } +void percpu_counter_set(struct percpu_counter *fbc, s64 amount); void __percpu_counter_mod(struct percpu_counter *fbc, s32 amount, s32 batch); void __percpu_counter_mod64(struct percpu_counter *fbc, s64 amount, s32 batch); s64 percpu_counter_sum(struct percpu_counter *fbc); @@ -87,6 +88,11 @@ static inline void percpu_counter_destro { } +static inline void percpu_counter_set(struct percpu_counter *fbc, s64 amount) +{ + fbc->count = amount; +} + #define __percpu_counter_mod(fbc, amount, batch) \ percpu_counter_mod(fbc, amount) Index: linux-2.6/lib/percpu_counter.c =================================================================== --- linux-2.6.orig/lib/percpu_counter.c 2007-05-02 12:44:13.000000000 +0200 +++ linux-2.6/lib/percpu_counter.c 2007-05-02 19:08:12.000000000 +0200 @@ -5,6 +5,19 @@ #include #include +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); +} + void __percpu_counter_mod(struct percpu_counter *fbc, s32 amount, s32 batch) { long count; -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/