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authorIngo Molnar <mingo@elte.hu>2009-02-26 13:02:23 +0100
committerIngo Molnar <mingo@elte.hu>2009-02-26 13:02:23 +0100
commit8e818179eb9e8f9e44d8410dd2a25077d026a08e (patch)
tree7d08afd30c95c04129c20693d974a18799caeb5a /kernel/sched.c
parent742bd95ba96e19b3f7196c3a0834ebc17c8ba006 (diff)
parentecc25fbd6b9e07b33895c61ddf84006b00f55d99 (diff)
downloadblackbird-op-linux-8e818179eb9e8f9e44d8410dd2a25077d026a08e.tar.gz
blackbird-op-linux-8e818179eb9e8f9e44d8410dd2a25077d026a08e.zip
Merge branch 'x86/core' into perfcounters/core
Conflicts: arch/x86/kernel/apic/apic.c arch/x86/kernel/irqinit_32.c Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/sched.c')
-rw-r--r--kernel/sched.c15
1 files changed, 12 insertions, 3 deletions
diff --git a/kernel/sched.c b/kernel/sched.c
index 83b68ff6df80..16b73635f28f 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -7026,20 +7026,26 @@ static void free_rootdomain(struct root_domain *rd)
static void rq_attach_root(struct rq *rq, struct root_domain *rd)
{
+ struct root_domain *old_rd = NULL;
unsigned long flags;
spin_lock_irqsave(&rq->lock, flags);
if (rq->rd) {
- struct root_domain *old_rd = rq->rd;
+ old_rd = rq->rd;
if (cpumask_test_cpu(rq->cpu, old_rd->online))
set_rq_offline(rq);
cpumask_clear_cpu(rq->cpu, old_rd->span);
- if (atomic_dec_and_test(&old_rd->refcount))
- free_rootdomain(old_rd);
+ /*
+ * If we dont want to free the old_rt yet then
+ * set old_rd to NULL to skip the freeing later
+ * in this function:
+ */
+ if (!atomic_dec_and_test(&old_rd->refcount))
+ old_rd = NULL;
}
atomic_inc(&rd->refcount);
@@ -7050,6 +7056,9 @@ static void rq_attach_root(struct rq *rq, struct root_domain *rd)
set_rq_online(rq);
spin_unlock_irqrestore(&rq->lock, flags);
+
+ if (old_rd)
+ free_rootdomain(old_rd);
}
static int __init_refok init_rootdomain(struct root_domain *rd, bool bootmem)
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