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author | Ingo Molnar <mingo@elte.hu> | 2009-02-20 17:40:43 +0100 |
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committer | Ingo Molnar <mingo@elte.hu> | 2009-02-20 17:40:43 +0100 |
commit | 3b6f7b9beb553ea71a6d4d76ba82cf32eb6dadd2 (patch) | |
tree | 2cd8a8d61f350aa3b00e6b0afc998544923f183e /kernel/sched.c | |
parent | 9be1b56a3e718aa998772019c57c398dbb19e258 (diff) | |
parent | 07a66d7c53a538e1a9759954a82bb6c07365eff9 (diff) | |
download | talos-obmc-linux-3b6f7b9beb553ea71a6d4d76ba82cf32eb6dadd2.tar.gz talos-obmc-linux-3b6f7b9beb553ea71a6d4d76ba82cf32eb6dadd2.zip |
Merge branch 'x86/urgent' into x86/core
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 61245b8d0f16..7d97ff7c4478 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -6939,20 +6939,26 @@ 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); @@ -6963,6 +6969,9 @@ 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) |