diff options
author | David S. Miller <davem@davemloft.net> | 2009-02-24 03:50:29 -0800 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2009-02-24 03:50:29 -0800 |
commit | e70049b9e74267dd47e1ffa62302073487afcb48 (patch) | |
tree | 2cd000c0751ef31c9044b020d63f278cdf4f332d /kernel/sched.c | |
parent | d18921a0e319ab512f8186b1b1142c7b8634c779 (diff) | |
parent | f7e603ad8f78cd3b59e33fa72707da0cbabdf699 (diff) |
Merge branch 'master' of /home/davem/src/GIT/linux-2.6/
Diffstat (limited to 'kernel/sched.c')
-rw-r--r-- | kernel/sched.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/kernel/sched.c b/kernel/sched.c index c1d0ed36008..410eec40413 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -6944,20 +6944,26 @@ 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); @@ -6968,6 +6974,9 @@ 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) |