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Commit 80f40ee4 authored by Bharata B Rao's avatar Bharata B Rao Committed by Ingo Molnar
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sched: use RCU variant of list traversal in for_each_leaf_rt_rq() 



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: default avatarBharata B Rao <bharata@linux.vnet.ibm.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 1bda7128

kernel/sched_rt.c

+1 −1
Original line number Diff line number Diff line
@@ -77,7 +77,7 @@ static inline u64 sched_rt_period(struct rt_rq *rt_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)

{