[git pull] core kernel fixes

From: Ingo Molnar
Date: Mon Jun 30 2008 - 11:34:52 EST


Linus,

Please pull the latest core kernel fixes git tree from:

git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip.git core-fixes-for-linus

Thanks,

Ingo

------------------>
Vegard Nossum (1):
debugobjects: fix lockdep warning

lib/debugobjects.c | 15 ++++++---------
1 files changed, 6 insertions(+), 9 deletions(-)

diff --git a/lib/debugobjects.c b/lib/debugobjects.c
index a76a5e1..85b18d7 100644
--- a/lib/debugobjects.c
+++ b/lib/debugobjects.c
@@ -68,6 +68,7 @@ static int fill_pool(void)
{
gfp_t gfp = GFP_ATOMIC | __GFP_NORETRY | __GFP_NOWARN;
struct debug_obj *new;
+ unsigned long flags;

if (likely(obj_pool_free >= ODEBUG_POOL_MIN_LEVEL))
return obj_pool_free;
@@ -81,10 +82,10 @@ static int fill_pool(void)
if (!new)
return obj_pool_free;

- spin_lock(&pool_lock);
+ spin_lock_irqsave(&pool_lock, flags);
hlist_add_head(&new->node, &obj_pool);
obj_pool_free++;
- spin_unlock(&pool_lock);
+ spin_unlock_irqrestore(&pool_lock, flags);
}
return obj_pool_free;
}
@@ -110,16 +111,13 @@ static struct debug_obj *lookup_object(void *addr, struct debug_bucket *b)
}

/*
- * Allocate a new object. If the pool is empty and no refill possible,
- * switch off the debugger.
+ * Allocate a new object. If the pool is empty, switch off the debugger.
*/
static struct debug_obj *
alloc_object(void *addr, struct debug_bucket *b, struct debug_obj_descr *descr)
{
struct debug_obj *obj = NULL;
- int retry = 0;

-repeat:
spin_lock(&pool_lock);
if (obj_pool.first) {
obj = hlist_entry(obj_pool.first, typeof(*obj), node);
@@ -141,9 +139,6 @@ repeat:
}
spin_unlock(&pool_lock);

- if (fill_pool() && !obj && !retry++)
- goto repeat;
-
return obj;
}

@@ -261,6 +256,8 @@ __debug_object_init(void *addr, struct debug_obj_descr *descr, int onstack)
struct debug_obj *obj;
unsigned long flags;

+ fill_pool();
+
db = get_bucket((unsigned long) addr);

spin_lock_irqsave(&db->lock, flags);
--
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