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Commit 3d398703 authored by Rusty Russell's avatar Rusty Russell Committed by Ingo Molnar
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sched_rt: don't use first_cpu on cpumask created with cpumask_and 



cpumask_and() only initializes nr_cpu_ids bits, so the (deprecated)
first_cpu() might find one of those uninitialized bits if nr_cpu_ids
is less than NR_CPUS (as it can be for CONFIG_CPUMASK_OFFSTACK).

Signed-off-by: default avatarRusty Russell <rusty@rustcorp.com.au>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent a571bbea

kernel/sched_rt.c

+2 −2
Original line number Diff line number Diff line
@@ -968,8 +968,8 @@ static inline int pick_optimal_cpu(int this_cpu, cpumask_t *mask) 
	if ((this_cpu != -1) && cpu_isset(this_cpu, *mask))

		return this_cpu;



	first = first_cpu(*mask);

	if (first != NR_CPUS)

	first = cpumask_first(mask);

	if (first < nr_cpu_ids)

		return first;



	return -1;