From ea319518ba3de282c13ae1cf4bf2215c5e03e67e Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Fri, 26 Dec 2008 15:08:55 +0100 Subject: locking, percpu counters: introduce separate lock classes Impact: fix lockdep false positives Classify percpu_counter instances similar to regular lock objects -- that is, per instantiation site. The networking code has increased its use of percpu_counters, which leads to false positives if they are treated as a single class. Signed-off-by: Peter Zijlstra Signed-off-by: Ingo Molnar --- lib/proportions.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'lib/proportions.c') diff --git a/lib/proportions.c b/lib/proportions.c index 4f387a643d7..7367f2b727d 100644 --- a/lib/proportions.c +++ b/lib/proportions.c @@ -83,11 +83,11 @@ int prop_descriptor_init(struct prop_descriptor *pd, int shift) pd->index = 0; pd->pg[0].shift = shift; mutex_init(&pd->mutex); - err = percpu_counter_init_irq(&pd->pg[0].events, 0); + err = percpu_counter_init(&pd->pg[0].events, 0); if (err) goto out; - err = percpu_counter_init_irq(&pd->pg[1].events, 0); + err = percpu_counter_init(&pd->pg[1].events, 0); if (err) percpu_counter_destroy(&pd->pg[0].events); @@ -191,7 +191,7 @@ int prop_local_init_percpu(struct prop_local_percpu *pl) spin_lock_init(&pl->lock); pl->shift = 0; pl->period = 0; - return percpu_counter_init_irq(&pl->events, 0); + return percpu_counter_init(&pl->events, 0); } void prop_local_destroy_percpu(struct prop_local_percpu *pl) -- cgit v1.2.3-70-g09d2 From 30079677428ae1349d5063b96f677270dfd54309 Mon Sep 17 00:00:00 2001 From: Harvey Harrison Date: Tue, 6 Jan 2009 14:40:50 -0800 Subject: lib: proportions.c trivial sparse lock annotation Suppresses sparse warning: lib/proportions.c:159:16: warning: context imbalance in 'prop_get_global': wrong count at exit lib/proportions.c:159:16: context 'RCU': wanted 0, got 1 lib/proportions.c:164:2: warning: context imbalance in 'prop_put_global': unexpected unlock lib/proportions.c:164:2: context 'RCU': wanted 0, got -1 Signed-off-by: Harvey Harrison Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- lib/proportions.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'lib/proportions.c') diff --git a/lib/proportions.c b/lib/proportions.c index 4f387a643d7..3fda810faf0 100644 --- a/lib/proportions.c +++ b/lib/proportions.c @@ -147,6 +147,7 @@ out: * this is used to track the active references. */ static struct prop_global *prop_get_global(struct prop_descriptor *pd) +__acquires(RCU) { int index; @@ -160,6 +161,7 @@ static struct prop_global *prop_get_global(struct prop_descriptor *pd) } static void prop_put_global(struct prop_descriptor *pd, struct prop_global *pg) +__releases(RCU) { rcu_read_unlock(); } -- cgit v1.2.3-70-g09d2