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sched: use RCU variant of list traversal in for_each_leaf_rt_rq()

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Impact: fix potential of rare crash

for_each_leaf_rt_rq() walks an RCU protected list (rq->leaf_rt_rq_list),
but doesn't use list_for_each_entry_rcu(). Fix this.

Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Bharata B Rao 2008-12-15 11:56:48 +05:30 committed by Ingo Molnar
parent 1bda71282d
commit 80f40ee4a0
1 changed files with 1 additions and 1 deletions
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2
kernel/sched_rt.c
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@ -77,7 +77,7 @@ static inline u64 sched_rt_period(struct rt_rq *rt_rq)
} }
#define for_each_leaf_rt_rq(rt_rq, rq) \ #define for_each_leaf_rt_rq(rt_rq, rq) \
list_for_each_entry(rt_rq, &rq->leaf_rt_rq_list, leaf_rt_rq_list) list_for_each_entry_rcu(rt_rq, &rq->leaf_rt_rq_list, leaf_rt_rq_list)
static inline struct rq *rq_of_rt_rq(struct rt_rq *rt_rq) static inline struct rq *rq_of_rt_rq(struct rt_rq *rt_rq)
{ {