From 252e0ba6b77dcfae448fa2fbaf796e8a83839e75 Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Tue, 16 Oct 2007 23:25:43 -0700 Subject: lib: percpu_counter variable batch Because the current batch setup has an quadric error bound on the counter, allow for an alternative setup. Signed-off-by: Peter Zijlstra Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/percpu_counter.h | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) (limited to 'include/linux/percpu_counter.h') diff --git a/include/linux/percpu_counter.h b/include/linux/percpu_counter.h index 438a170187ec..40df86f7a3b4 100644 --- a/include/linux/percpu_counter.h +++ b/include/linux/percpu_counter.h @@ -32,9 +32,14 @@ struct percpu_counter { void percpu_counter_init(struct percpu_counter *fbc, s64 amount); void percpu_counter_destroy(struct percpu_counter *fbc); -void percpu_counter_add(struct percpu_counter *fbc, s32 amount); +void __percpu_counter_add(struct percpu_counter *fbc, s32 amount, s32 batch); s64 percpu_counter_sum(struct percpu_counter *fbc); +static inline void percpu_counter_add(struct percpu_counter *fbc, s32 amount) +{ + __percpu_counter_add(fbc, amount, FBC_BATCH); +} + static inline s64 percpu_counter_read(struct percpu_counter *fbc) { return fbc->count; @@ -70,6 +75,9 @@ static inline void percpu_counter_destroy(struct percpu_counter *fbc) { } +#define __percpu_counter_add(fbc, amount, batch) \ + percpu_counter_add(fbc, amount) + static inline void percpu_counter_add(struct percpu_counter *fbc, s32 amount) { -- cgit v1.2.3-59-g8ed1b