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| author | Oleg Nesterov <oleg@tv-sign.ru> | 2006-01-08 22:19:33 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-09 17:01:39 -0800 |
| commit | dbc1651f0c5b7d13acc59d3b805a7224332fb1fb (patch) | |
| tree | 1e380afb42aa091d2acce50cd2cc10e368d1026a /kernel | |
| parent | 1fd5a46dd6bbca3a1275465120caf4748872c2a7 (diff) | |
| download | lwn-dbc1651f0c5b7d13acc59d3b805a7224332fb1fb.tar.gz lwn-dbc1651f0c5b7d13acc59d3b805a7224332fb1fb.zip | |
[PATCH] rcu: don't set ->next_pending in rcu_start_batch()
I think it is better to set ->next_pending in the caller, when
it is needed. This saves one parameter, and this coincides with
cpu_quiet() beahaviour, which sets ->completed = ->cur itself.
Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Acked-by: Paul E. McKenney <paulmck@us.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/rcupdate.c | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/kernel/rcupdate.c b/kernel/rcupdate.c index ccc45d49ce71..05ee48316f70 100644 --- a/kernel/rcupdate.c +++ b/kernel/rcupdate.c @@ -236,12 +236,8 @@ static void rcu_do_batch(struct rcu_data *rdp) * active batch and the batch to be registered has not already occurred. * Caller must hold rcu_state.lock. */ -static void rcu_start_batch(struct rcu_ctrlblk *rcp, struct rcu_state *rsp, - int next_pending) +static void rcu_start_batch(struct rcu_ctrlblk *rcp, struct rcu_state *rsp) { - if (next_pending) - rcp->next_pending = 1; - if (rcp->next_pending && rcp->completed == rcp->cur) { rcp->next_pending = 0; @@ -275,7 +271,7 @@ static void cpu_quiet(int cpu, struct rcu_ctrlblk *rcp, struct rcu_state *rsp) if (cpus_empty(rsp->cpumask)) { /* batch completed ! */ rcp->completed = rcp->cur; - rcu_start_batch(rcp, rsp, 0); + rcu_start_batch(rcp, rsp); } } @@ -410,7 +406,8 @@ static void __rcu_process_callbacks(struct rcu_ctrlblk *rcp, if (!rcp->next_pending) { /* and start it/schedule start if it's a new batch */ spin_lock(&rsp->lock); - rcu_start_batch(rcp, rsp, 1); + rcp->next_pending = 1; + rcu_start_batch(rcp, rsp); spin_unlock(&rsp->lock); } } else { |