From bf1d89c81352f6eca72d0c10cfee3dba29ef5efb Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Tue, 16 Oct 2007 23:25:45 -0700 Subject: lib: percpu_count_sum() Provide an accurate version of percpu_counter_read. Signed-off-by: Peter Zijlstra Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/percpu_counter.h | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/percpu_counter.h b/include/linux/percpu_counter.h index dd89eb978393..21e054595bcb 100644 --- a/include/linux/percpu_counter.h +++ b/include/linux/percpu_counter.h @@ -34,13 +34,24 @@ 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_positive(struct percpu_counter *fbc); +s64 __percpu_counter_sum(struct percpu_counter *fbc); static inline void percpu_counter_add(struct percpu_counter *fbc, s64 amount) { __percpu_counter_add(fbc, amount, FBC_BATCH); } +static inline s64 percpu_counter_sum_positive(struct percpu_counter *fbc) +{ + s64 ret = __percpu_counter_sum(fbc); + return ret < 0 ? 0 : ret; +} + +static inline s64 percpu_counter_sum(struct percpu_counter *fbc) +{ + return __percpu_counter_sum(fbc); +} + static inline s64 percpu_counter_read(struct percpu_counter *fbc) { return fbc->count; @@ -107,6 +118,11 @@ static inline s64 percpu_counter_sum_positive(struct percpu_counter *fbc) return percpu_counter_read_positive(fbc); } +static inline s64 percpu_counter_sum(struct percpu_counter *fbc) +{ + return percpu_counter_read(fbc); +} + #endif /* CONFIG_SMP */ static inline void percpu_counter_inc(struct percpu_counter *fbc) -- cgit v1.2.3-59-g8ed1b