From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: linux-mm@kvack.org, linux-kernel@vger.kernel.org
Cc: miklos@szeredi.hu, akpm@linux-foundation.org, neilb@suse.de,
dgc@sgi.com, tomoki.sekiyama.qu@hitachi.com,
a.p.zijlstra@chello.nl, nikita@clusterfs.com,
trond.myklebust@fys.uio.no, yingchao.zhou@gmail.com,
andrea@suse.de
Subject: [PATCH 06/17] lib: percpu_counter_init_irq
Date: Thu, 14 Jun 2007 23:58:23 +0200 [thread overview]
Message-ID: <20070614220446.724626895@chello.nl> (raw)
In-Reply-To: 20070614215817.389524447@chello.nl
[-- Attachment #1: percpu_counter_init_irq.patch --]
[-- Type: text/plain, Size: 1914 bytes --]
provide a way to init percpu_counters that are supposed to be used from irq
safe contexts.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
---
include/linux/percpu_counter.h | 4 ++++
lib/percpu_counter.c | 8 ++++++++
2 files changed, 12 insertions(+)
Index: linux-2.6/include/linux/percpu_counter.h
===================================================================
--- linux-2.6.orig/include/linux/percpu_counter.h
+++ linux-2.6/include/linux/percpu_counter.h
@@ -31,6 +31,8 @@ struct percpu_counter {
#endif
void percpu_counter_init(struct percpu_counter *fbc, s64 amount);
+void percpu_counter_init_irq(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_mod(struct percpu_counter *fbc, s32 amount, s32 batch);
@@ -89,6 +91,8 @@ static inline void percpu_counter_init(s
fbc->count = amount;
}
+#define percpu_counter_init_irq percpu_counter_init
+
static inline void percpu_counter_destroy(struct percpu_counter *fbc)
{
}
Index: linux-2.6/lib/percpu_counter.c
===================================================================
--- linux-2.6.orig/lib/percpu_counter.c
+++ linux-2.6/lib/percpu_counter.c
@@ -87,6 +87,8 @@ s64 __percpu_counter_sum(struct percpu_c
}
EXPORT_SYMBOL(__percpu_counter_sum);
+static struct lock_class_key percpu_counter_irqsafe;
+
void percpu_counter_init(struct percpu_counter *fbc, s64 amount)
{
spin_lock_init(&fbc->lock);
@@ -100,6 +102,12 @@ void percpu_counter_init(struct percpu_c
}
EXPORT_SYMBOL(percpu_counter_init);
+void percpu_counter_init_irq(struct percpu_counter *fbc, s64 amount)
+{
+ percpu_counter_init(fbc, amount);
+ lockdep_set_class(&fbc->lock, &percpu_counter_irqsafe);
+}
+
void percpu_counter_destroy(struct percpu_counter *fbc)
{
free_percpu(fbc->counters);
--
next prev parent reply other threads:[~2007-06-14 22:10 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-14 21:58 [PATCH 00/17] per device dirty throttling -v7 Peter Zijlstra
2007-06-14 21:58 ` [PATCH 01/17] nfs: remove congestion_end() Peter Zijlstra
2007-06-14 21:58 ` [PATCH 02/17] lib: percpu_counter variable batch Peter Zijlstra
2007-06-14 21:58 ` [PATCH 03/17] lib: percpu_counter_mod64 Peter Zijlstra
2007-06-14 21:58 ` [PATCH 04/17] lib: percpu_counter_set Peter Zijlstra
2007-06-14 21:58 ` [PATCH 05/17] lib: percpu_count_sum_signed() Peter Zijlstra
2007-07-17 16:32 ` Josef Sipek
2007-07-17 16:35 ` Josef Sipek
2007-06-14 21:58 ` Peter Zijlstra [this message]
2007-07-17 16:35 ` [PATCH 06/17] lib: percpu_counter_init_irq Josef Sipek
2007-06-14 21:58 ` [PATCH 07/17] mm: bdi init hooks Peter Zijlstra
2007-06-14 21:58 ` [PATCH 08/17] containers: " Peter Zijlstra
2007-06-14 21:58 ` [PATCH 09/17] mtd: give mtdconcat devices their own backing_dev_info Peter Zijlstra
2007-06-14 21:58 ` [PATCH 10/17] mm: scalable bdi statistics counters Peter Zijlstra
2007-06-14 21:58 ` [PATCH 11/17] mm: count reclaimable pages per BDI Peter Zijlstra
2007-06-14 21:58 ` [PATCH 12/17] mm: count writeback " Peter Zijlstra
2007-06-14 21:58 ` [PATCH 13/17] mm: expose BDI statistics in sysfs Peter Zijlstra
2007-06-14 21:58 ` [PATCH 14/17] lib: floating proportions Peter Zijlstra
2007-06-14 21:58 ` [PATCH 15/17] lib: floating proportions _single Peter Zijlstra
2007-06-14 21:58 ` [PATCH 16/17] mm: per device dirty threshold Peter Zijlstra
2007-06-14 21:58 ` [PATCH 17/17] mm: dirty balancing for tasks Peter Zijlstra
2007-06-14 23:14 ` [PATCH 00/17] per device dirty throttling -v7 Andrew Morton
2007-07-17 10:10 ` Miklos Szeredi
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