From: Roland Dreier <rdreier@cisco.com>
To: torvalds@osdl.org
Cc: openib-general@openib.org, linux-kernel@vger.kernel.org
Subject: [GIT PULL] please pull infiniband.git
Date: Thu, 31 Aug 2006 17:29:09 -0700 [thread overview]
Message-ID: <ada8xl4jup6.fsf@cisco.com> (raw)
Linus, please pull from
master.kernel.org:/pub/scm/linux/kernel/git/roland/infiniband.git for-linus
This tree is also available from kernel.org mirrors at:
git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband.git for-linus
to get a fix for a locking bug found by lockdep:
Roland Dreier:
IB/mthca: Use IRQ safe locks to protect allocation bitmaps
drivers/infiniband/hw/mthca/mthca_allocator.c | 15 +++++++++++----
1 files changed, 11 insertions(+), 4 deletions(-)
diff --git a/drivers/infiniband/hw/mthca/mthca_allocator.c b/drivers/infiniband/hw/mthca/mthca_allocator.c
index 25157f5..f930e55 100644
--- a/drivers/infiniband/hw/mthca/mthca_allocator.c
+++ b/drivers/infiniband/hw/mthca/mthca_allocator.c
@@ -41,9 +41,11 @@ #include "mthca_dev.h"
/* Trivial bitmap-based allocator */
u32 mthca_alloc(struct mthca_alloc *alloc)
{
+ unsigned long flags;
u32 obj;
- spin_lock(&alloc->lock);
+ spin_lock_irqsave(&alloc->lock, flags);
+
obj = find_next_zero_bit(alloc->table, alloc->max, alloc->last);
if (obj >= alloc->max) {
alloc->top = (alloc->top + alloc->max) & alloc->mask;
@@ -56,19 +58,24 @@ u32 mthca_alloc(struct mthca_alloc *allo
} else
obj = -1;
- spin_unlock(&alloc->lock);
+ spin_unlock_irqrestore(&alloc->lock, flags);
return obj;
}
void mthca_free(struct mthca_alloc *alloc, u32 obj)
{
+ unsigned long flags;
+
obj &= alloc->max - 1;
- spin_lock(&alloc->lock);
+
+ spin_lock_irqsave(&alloc->lock, flags);
+
clear_bit(obj, alloc->table);
alloc->last = min(alloc->last, obj);
alloc->top = (alloc->top + alloc->max) & alloc->mask;
- spin_unlock(&alloc->lock);
+
+ spin_unlock_irqrestore(&alloc->lock, flags);
}
int mthca_alloc_init(struct mthca_alloc *alloc, u32 num, u32 mask,
next reply other threads:[~2006-09-01 0:29 UTC|newest]
Thread overview: 223+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-09-01 0:29 Roland Dreier [this message]
-- strict thread matches above, loose matches on Subject: below --
2015-04-22 17:08 [GIT PULL] please pull infiniband.git Roland Dreier
2015-04-02 17:27 Roland Dreier
2015-02-20 17:08 Roland Dreier
2015-02-06 21:19 Roland Dreier
2015-02-07 15:58 ` Yann Droneaud
2015-02-03 21:42 Roland Dreier
2014-12-19 0:03 Roland Dreier
2014-10-16 22:52 Roland Dreier
2014-10-20 23:28 ` Doug Ledford
2014-11-02 20:06 ` Dave Airlie
2014-11-03 7:15 ` Eli Cohen
2014-11-03 7:58 ` Sagi Grimberg
2014-09-23 21:58 Roland Dreier
2014-09-27 21:19 ` Or Gerlitz
2014-08-14 16:05 Roland Dreier
2014-07-18 20:40 Roland Dreier
2014-06-10 17:14 Roland Dreier
2014-05-02 0:09 Roland Dreier
2014-04-18 18:40 Roland Dreier
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2014-01-24 19:43 Roland Dreier
2013-12-23 17:24 Roland Dreier
2013-11-18 18:40 Roland Dreier
2013-11-19 17:25 ` Or Gerlitz
2013-10-22 17:22 Roland Dreier
2013-10-14 18:16 Roland Dreier
2013-10-15 0:52 ` Linus Torvalds
2013-10-15 17:48 ` Roland Dreier
2013-09-04 17:03 Roland Dreier
2013-09-05 0:31 ` Stephen Rothwell
2013-09-05 16:42 ` Linus Torvalds
2013-09-05 16:43 ` David Miller
2013-08-02 16:12 Roland Dreier
2013-07-11 23:52 Roland Dreier
2013-07-09 17:36 Roland Dreier
2013-07-10 14:35 ` Sebastian Riemer
2013-07-10 14:38 ` Roland Dreier
2013-07-10 15:34 ` Bart Van Assche
2013-06-07 22:28 Roland Dreier
2013-05-08 21:20 Roland Dreier
2013-03-25 16:42 Roland Dreier
2013-04-05 15:56 ` David Woodhouse
2013-02-26 17:41 Roland Dreier
2013-02-07 1:15 Roland Dreier
2012-12-21 21:42 Roland Dreier
2012-12-11 5:59 Roland Dreier
2012-12-14 9:56 ` Roland Dreier
2012-12-14 15:36 ` Linus Torvalds
2012-12-14 23:57 ` Roland Dreier
2012-10-26 19:55 Roland Dreier
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2012-06-25 14:11 ` Tziporet Koren
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2012-05-21 2:05 ` Stephen Rothwell
2012-05-21 2:35 ` Roland Dreier
2012-05-21 3:39 ` Stephen Rothwell
2012-05-21 16:07 ` Roland Dreier
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