* [tip: core/rcu] time: Export tick start/stop functions for rcutorture
@ 2019-10-31 11:55 tip-bot2 for Paul E. McKenney
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From: tip-bot2 for Paul E. McKenney @ 2019-10-31 11:55 UTC (permalink / raw)
To: linux-tip-commits
Cc: kbuild test robot, Paul E. McKenney, Ingo Molnar,
Borislav Petkov, linux-kernel
The following commit has been merged into the core/rcu branch of tip:
Commit-ID: ae9e557b5be2e285f48ee945d9c8faf75d4f6a66
Gitweb: https://git.kernel.org/tip/ae9e557b5be2e285f48ee945d9c8faf75d4f6a66
Author: Paul E. McKenney <paulmck@kernel.org>
AuthorDate: Fri, 09 Aug 2019 16:29:42 -07:00
Committer: Paul E. McKenney <paulmck@kernel.org>
CommitterDate: Sat, 05 Oct 2019 10:46:03 -07:00
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>
---
kernel/time/tick-sched.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index d1b0a84..1ffdb4b 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -172,6 +172,7 @@ static void tick_sched_handle(struct tick_sched *ts, struct pt_regs *regs)
#ifdef CONFIG_NO_HZ_FULL
cpumask_var_t tick_nohz_full_mask;
bool tick_nohz_full_running;
+EXPORT_SYMBOL_GPL(tick_nohz_full_running);
static atomic_t tick_dep_mask;
static bool check_tick_dependency(atomic_t *dep)
@@ -351,11 +352,13 @@ void tick_nohz_dep_set_task(struct task_struct *tsk, enum tick_dep_bits bit)
*/
tick_nohz_dep_set_all(&tsk->tick_dep_mask, bit);
}
+EXPORT_SYMBOL_GPL(tick_nohz_dep_set_task);
void tick_nohz_dep_clear_task(struct task_struct *tsk, enum tick_dep_bits bit)
{
atomic_andnot(BIT(bit), &tsk->tick_dep_mask);
}
+EXPORT_SYMBOL_GPL(tick_nohz_dep_clear_task);
/*
* Set a per-taskgroup tick dependency. Posix CPU timers need this in order to elapse
@@ -404,6 +407,7 @@ void __init tick_nohz_full_setup(cpumask_var_t cpumask)
cpumask_copy(tick_nohz_full_mask, cpumask);
tick_nohz_full_running = true;
}
+EXPORT_SYMBOL_GPL(tick_nohz_full_setup);
static int tick_nohz_cpu_down(unsigned int cpu)
{
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