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sched: walt: Ensure only valid cpu selected

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Under FBT, we currently do not check if an active candidate is actually
valid before setting it as part of the candidates mask. This can lead to
page faults.

Change-Id: I5aedb3bd1e076736270aa03b8889c67606c2a25d
Signed-off-by: Shaleen Agrawal <shalagra@codeaurora.org>
This commit is contained in:
Shaleen Agrawal 2021-06-24 14:57:44 -07:00 committed by Rishabh Bhatnagar
parent 228d91e408
commit 5c3c385a68
1 changed files with 1 additions and 1 deletions
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2
kernel/sched/walt/walt_cfs.c
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@ -448,7 +448,7 @@ static void walt_find_best_target(struct sched_domain *sd,
if (unlikely(cpumask_empty(candidates))) {
if (most_spare_cap_cpu != -1)
cpumask_set_cpu(most_spare_cap_cpu, candidates);
else if (!cpu_active(prev_cpu))
else if (!cpu_active(prev_cpu) && active_candidate != -1)
cpumask_set_cpu(active_candidate, candidates);
}