time: Export tick start/stop functions for rcutorture
It turns out that rcutorture needs to ensure that the scheduling-clock interrupt is enabled in CONFIG_NO_HZ_FULL kernels before starting on CPU-bound in-kernel processing. This commit therefore exports tick_nohz_dep_set_task(), tick_nohz_dep_clear_task(), and tick_nohz_full_setup() to GPL kernel modules. Reported-by: kbuild test robot <lkp@intel.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
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@ -172,6 +172,7 @@ static void tick_sched_handle(struct tick_sched *ts, struct pt_regs *regs)
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#ifdef CONFIG_NO_HZ_FULL
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#ifdef CONFIG_NO_HZ_FULL
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cpumask_var_t tick_nohz_full_mask;
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cpumask_var_t tick_nohz_full_mask;
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bool tick_nohz_full_running;
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bool tick_nohz_full_running;
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EXPORT_SYMBOL_GPL(tick_nohz_full_running);
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static atomic_t tick_dep_mask;
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static atomic_t tick_dep_mask;
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static bool check_tick_dependency(atomic_t *dep)
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static bool check_tick_dependency(atomic_t *dep)
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@ -351,11 +352,13 @@ void tick_nohz_dep_set_task(struct task_struct *tsk, enum tick_dep_bits bit)
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*/
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*/
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tick_nohz_dep_set_all(&tsk->tick_dep_mask, bit);
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tick_nohz_dep_set_all(&tsk->tick_dep_mask, bit);
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}
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}
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EXPORT_SYMBOL_GPL(tick_nohz_dep_set_task);
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void tick_nohz_dep_clear_task(struct task_struct *tsk, enum tick_dep_bits bit)
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void tick_nohz_dep_clear_task(struct task_struct *tsk, enum tick_dep_bits bit)
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{
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{
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atomic_andnot(BIT(bit), &tsk->tick_dep_mask);
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atomic_andnot(BIT(bit), &tsk->tick_dep_mask);
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}
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}
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EXPORT_SYMBOL_GPL(tick_nohz_dep_clear_task);
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/*
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/*
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* Set a per-taskgroup tick dependency. Posix CPU timers need this in order to elapse
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* Set a per-taskgroup tick dependency. Posix CPU timers need this in order to elapse
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@ -404,6 +407,7 @@ void __init tick_nohz_full_setup(cpumask_var_t cpumask)
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cpumask_copy(tick_nohz_full_mask, cpumask);
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cpumask_copy(tick_nohz_full_mask, cpumask);
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tick_nohz_full_running = true;
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tick_nohz_full_running = true;
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}
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}
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EXPORT_SYMBOL_GPL(tick_nohz_full_setup);
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static int tick_nohz_cpu_down(unsigned int cpu)
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static int tick_nohz_cpu_down(unsigned int cpu)
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{
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{
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