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lineage_android_kernel_xiaomi_sdm845
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Merge "sched/walt: Fix invalid access of CPU cycle counter callback"

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Linux Build Service Account 2019-07-25 11:29:06 -07:00 committed by Gerrit - the friendly Code Review server
parent c6200090ce a3c6d226ca
commit 896dbc4525
1 changed files with 6 additions and 1 deletions
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7
kernel/sched/walt.c
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@ -1,5 +1,5 @@
/* /*
* Copyright (c) 2016-2018, The Linux Foundation. All rights reserved. * Copyright (c) 2016-2019, The Linux Foundation. All rights reserved.
* *
* This program is free software; you can redistribute it and/or modify * This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and * it under the terms of the GNU General Public License version 2 and
@ -323,14 +323,19 @@ update_window_start(struct rq *rq, u64 wallclock, int event)
int register_cpu_cycle_counter_cb(struct cpu_cycle_counter_cb *cb) int register_cpu_cycle_counter_cb(struct cpu_cycle_counter_cb *cb)
{ {
unsigned long flags;
mutex_lock(&cluster_lock); mutex_lock(&cluster_lock);
if (!cb->get_cpu_cycle_counter) { if (!cb->get_cpu_cycle_counter) {
mutex_unlock(&cluster_lock); mutex_unlock(&cluster_lock);
return -EINVAL; return -EINVAL;
} }
acquire_rq_locks_irqsave(cpu_possible_mask, &flags);
cpu_cycle_counter_cb = *cb; cpu_cycle_counter_cb = *cb;
use_cycle_counter = true; use_cycle_counter = true;
release_rq_locks_irqrestore(cpu_possible_mask, &flags);
mutex_unlock(&cluster_lock); mutex_unlock(&cluster_lock);
return 0; return 0;