This commit make rcu-tasks related rcutorture test support rcu-tasks
gp state printing when the writer stall occurs or the at the end of
rcutorture test.
The test is as follows:
[ 3872.548702] tasks-tracing: Start-test grace-period state: g4560 f0x0
[ 4332.661283] tasks-tracing: End-test grace-period state: g41540 f0x0 total-gps=36980
[ 4401.381138] tasks: Start-test grace-period state: g8 f0x0
[ 4565.619354] tasks: End-test grace-period state: g1732 f0x0 total-gps=1724
[ 4589.006917] tasks-rude: Start-test grace-period state: g8 f0x0
[ 5059.379321] tasks-rude: End-test grace-period state: g8508 f0x0 total-gps=8500
Signed-off-by: Zqiang <[email protected]>
---
kernel/rcu/rcu.h | 8 ++++++++
kernel/rcu/rcutorture.c | 3 +++
kernel/rcu/tasks.h | 25 +++++++++++++++++++++++++
3 files changed, 36 insertions(+)
diff --git a/kernel/rcu/rcu.h b/kernel/rcu/rcu.h
index 86fce206560e..3353e3697645 100644
--- a/kernel/rcu/rcu.h
+++ b/kernel/rcu/rcu.h
@@ -556,6 +556,14 @@ static inline unsigned long rcu_get_jiffies_lazy_flush(void) { return 0; }
static inline void rcu_set_jiffies_lazy_flush(unsigned long j) { }
#endif
+#ifdef CONFIG_TASKS_RCU_GENERIC
+void rcutaskstorture_get_gp_data(enum rcutorture_type test_type, int *flags,
+ unsigned long *gp_seq);
+#else
+static inline void rcutaskstorture_get_gp_data(enum rcutorture_type test_type, int *flags,
+ unsigned long *gp_seq) { }
+#endif
+
#if defined(CONFIG_TREE_RCU)
void rcutorture_get_gp_data(enum rcutorture_type test_type, int *flags,
unsigned long *gp_seq);
diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c
index dd7d5ba45740..91c03f37fd97 100644
--- a/kernel/rcu/rcutorture.c
+++ b/kernel/rcu/rcutorture.c
@@ -2267,6 +2267,7 @@ rcu_torture_stats_print(void)
&flags, &gp_seq);
srcutorture_get_gp_data(cur_ops->ttype, srcu_ctlp,
&flags, &gp_seq);
+ rcutaskstorture_get_gp_data(cur_ops->ttype, &flags, &gp_seq);
wtp = READ_ONCE(writer_task);
pr_alert("??? Writer stall state %s(%d) g%lu f%#x ->state %#x cpu %d\n",
rcu_torture_writer_state_getname(),
@@ -3391,6 +3392,7 @@ rcu_torture_cleanup(void)
rcutorture_get_gp_data(cur_ops->ttype, &flags, &gp_seq);
srcutorture_get_gp_data(cur_ops->ttype, srcu_ctlp, &flags, &gp_seq);
+ rcutaskstorture_get_gp_data(cur_ops->ttype, &flags, &gp_seq);
pr_alert("%s: End-test grace-period state: g%ld f%#x total-gps=%ld\n",
cur_ops->name, (long)gp_seq, flags,
rcutorture_seq_diff(gp_seq, start_gp_seq));
@@ -3763,6 +3765,7 @@ rcu_torture_init(void)
rcu_torture_print_module_parms(cur_ops, "Start of test");
rcutorture_get_gp_data(cur_ops->ttype, &flags, &gp_seq);
srcutorture_get_gp_data(cur_ops->ttype, srcu_ctlp, &flags, &gp_seq);
+ rcutaskstorture_get_gp_data(cur_ops->ttype, &flags, &gp_seq);
start_gp_seq = gp_seq;
pr_alert("%s: Start-test grace-period state: g%ld f%#x\n",
cur_ops->name, (long)gp_seq, flags);
diff --git a/kernel/rcu/tasks.h b/kernel/rcu/tasks.h
index e83adcdb49b5..b1254cf3c210 100644
--- a/kernel/rcu/tasks.h
+++ b/kernel/rcu/tasks.h
@@ -2149,6 +2149,31 @@ late_initcall(rcu_tasks_verify_schedule_work);
static void rcu_tasks_initiate_self_tests(void) { }
#endif /* #else #ifdef CONFIG_PROVE_RCU */
+void rcutaskstorture_get_gp_data(enum rcutorture_type test_type, int *flags,
+ unsigned long *gp_seq)
+{
+ switch (test_type) {
+ case RCU_TASKS_FLAVOR:
+#ifdef CONFIG_TASKS_RCU
+ *gp_seq = rcu_seq_current(&rcu_tasks.tasks_gp_seq);
+#endif
+ break;
+ case RCU_TASKS_RUDE_FLAVOR:
+#ifdef CONFIG_TASKS_RUDE_RCU
+ *gp_seq = rcu_seq_current(&rcu_tasks_rude.tasks_gp_seq);
+#endif
+ break;
+ case RCU_TASKS_TRACING_FLAVOR:
+#ifdef CONFIG_TASKS_TRACE_RCU
+ *gp_seq = rcu_seq_current(&rcu_tasks_trace.tasks_gp_seq);
+#endif
+ break;
+ default:
+ break;
+ }
+}
+EXPORT_SYMBOL_GPL(rcutaskstorture_get_gp_data);
+
void __init tasks_cblist_init_generic(void)
{
lockdep_assert_irqs_disabled();
--
2.17.1
On Tue, Mar 12, 2024 at 03:23:57PM +0800, Zqiang wrote:
> This commit make rcu-tasks related rcutorture test support rcu-tasks
> gp state printing when the writer stall occurs or the at the end of
> rcutorture test.
>
> The test is as follows:
> [ 3872.548702] tasks-tracing: Start-test grace-period state: g4560 f0x0
> [ 4332.661283] tasks-tracing: End-test grace-period state: g41540 f0x0 total-gps=36980
>
> [ 4401.381138] tasks: Start-test grace-period state: g8 f0x0
> [ 4565.619354] tasks: End-test grace-period state: g1732 f0x0 total-gps=1724
>
> [ 4589.006917] tasks-rude: Start-test grace-period state: g8 f0x0
> [ 5059.379321] tasks-rude: End-test grace-period state: g8508 f0x0 total-gps=8500
>
> Signed-off-by: Zqiang <[email protected]>
Again, good eyes, and that fix would work. But wouldn't it make more
sense to create a new cur_ops function pointer for these functions?
That might allow getting rid of the *_FLAVOR checks and values, plus
simplify the code a bit. To make the function signatures work out,
there would need to be an intermediate SRCU function to supply the right
rcu_struct pointer.
This would shorten and simplify the code a bit.
Or is there some reason that this won't work?
Why didn't I do that to start with? Well, the various RCU flavors
appeared one at a time over some years... ;-)
Thanx, Paul
> ---
> kernel/rcu/rcu.h | 8 ++++++++
> kernel/rcu/rcutorture.c | 3 +++
> kernel/rcu/tasks.h | 25 +++++++++++++++++++++++++
> 3 files changed, 36 insertions(+)
>
> diff --git a/kernel/rcu/rcu.h b/kernel/rcu/rcu.h
> index 86fce206560e..3353e3697645 100644
> --- a/kernel/rcu/rcu.h
> +++ b/kernel/rcu/rcu.h
> @@ -556,6 +556,14 @@ static inline unsigned long rcu_get_jiffies_lazy_flush(void) { return 0; }
> static inline void rcu_set_jiffies_lazy_flush(unsigned long j) { }
> #endif
>
> +#ifdef CONFIG_TASKS_RCU_GENERIC
> +void rcutaskstorture_get_gp_data(enum rcutorture_type test_type, int *flags,
> + unsigned long *gp_seq);
> +#else
> +static inline void rcutaskstorture_get_gp_data(enum rcutorture_type test_type, int *flags,
> + unsigned long *gp_seq) { }
> +#endif
> +
> #if defined(CONFIG_TREE_RCU)
> void rcutorture_get_gp_data(enum rcutorture_type test_type, int *flags,
> unsigned long *gp_seq);
> diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c
> index dd7d5ba45740..91c03f37fd97 100644
> --- a/kernel/rcu/rcutorture.c
> +++ b/kernel/rcu/rcutorture.c
> @@ -2267,6 +2267,7 @@ rcu_torture_stats_print(void)
> &flags, &gp_seq);
> srcutorture_get_gp_data(cur_ops->ttype, srcu_ctlp,
> &flags, &gp_seq);
> + rcutaskstorture_get_gp_data(cur_ops->ttype, &flags, &gp_seq);
> wtp = READ_ONCE(writer_task);
> pr_alert("??? Writer stall state %s(%d) g%lu f%#x ->state %#x cpu %d\n",
> rcu_torture_writer_state_getname(),
> @@ -3391,6 +3392,7 @@ rcu_torture_cleanup(void)
>
> rcutorture_get_gp_data(cur_ops->ttype, &flags, &gp_seq);
> srcutorture_get_gp_data(cur_ops->ttype, srcu_ctlp, &flags, &gp_seq);
> + rcutaskstorture_get_gp_data(cur_ops->ttype, &flags, &gp_seq);
> pr_alert("%s: End-test grace-period state: g%ld f%#x total-gps=%ld\n",
> cur_ops->name, (long)gp_seq, flags,
> rcutorture_seq_diff(gp_seq, start_gp_seq));
> @@ -3763,6 +3765,7 @@ rcu_torture_init(void)
> rcu_torture_print_module_parms(cur_ops, "Start of test");
> rcutorture_get_gp_data(cur_ops->ttype, &flags, &gp_seq);
> srcutorture_get_gp_data(cur_ops->ttype, srcu_ctlp, &flags, &gp_seq);
> + rcutaskstorture_get_gp_data(cur_ops->ttype, &flags, &gp_seq);
> start_gp_seq = gp_seq;
> pr_alert("%s: Start-test grace-period state: g%ld f%#x\n",
> cur_ops->name, (long)gp_seq, flags);
> diff --git a/kernel/rcu/tasks.h b/kernel/rcu/tasks.h
> index e83adcdb49b5..b1254cf3c210 100644
> --- a/kernel/rcu/tasks.h
> +++ b/kernel/rcu/tasks.h
> @@ -2149,6 +2149,31 @@ late_initcall(rcu_tasks_verify_schedule_work);
> static void rcu_tasks_initiate_self_tests(void) { }
> #endif /* #else #ifdef CONFIG_PROVE_RCU */
>
> +void rcutaskstorture_get_gp_data(enum rcutorture_type test_type, int *flags,
> + unsigned long *gp_seq)
> +{
> + switch (test_type) {
> + case RCU_TASKS_FLAVOR:
> +#ifdef CONFIG_TASKS_RCU
> + *gp_seq = rcu_seq_current(&rcu_tasks.tasks_gp_seq);
> +#endif
> + break;
> + case RCU_TASKS_RUDE_FLAVOR:
> +#ifdef CONFIG_TASKS_RUDE_RCU
> + *gp_seq = rcu_seq_current(&rcu_tasks_rude.tasks_gp_seq);
> +#endif
> + break;
> + case RCU_TASKS_TRACING_FLAVOR:
> +#ifdef CONFIG_TASKS_TRACE_RCU
> + *gp_seq = rcu_seq_current(&rcu_tasks_trace.tasks_gp_seq);
> +#endif
> + break;
> + default:
> + break;
> + }
> +}
> +EXPORT_SYMBOL_GPL(rcutaskstorture_get_gp_data);
> +
> void __init tasks_cblist_init_generic(void)
> {
> lockdep_assert_irqs_disabled();
> --
> 2.17.1
>
>
> On Tue, Mar 12, 2024 at 03:23:57PM +0800, Zqiang wrote:
> > This commit make rcu-tasks related rcutorture test support rcu-tasks
> > gp state printing when the writer stall occurs or the at the end of
> > rcutorture test.
> >
> > The test is as follows:
> > [ 3872.548702] tasks-tracing: Start-test grace-period state: g4560 f0x0
> > [ 4332.661283] tasks-tracing: End-test grace-period state: g41540 f0x0 total-gps=36980
> >
> > [ 4401.381138] tasks: Start-test grace-period state: g8 f0x0
> > [ 4565.619354] tasks: End-test grace-period state: g1732 f0x0 total-gps=1724
> >
> > [ 4589.006917] tasks-rude: Start-test grace-period state: g8 f0x0
> > [ 5059.379321] tasks-rude: End-test grace-period state: g8508 f0x0 total-gps=8500
> >
> > Signed-off-by: Zqiang <[email protected]>
>
> Again, good eyes, and that fix would work. But wouldn't it make more
> sense to create a new cur_ops function pointer for these functions?
> That might allow getting rid of the *_FLAVOR checks and values, plus
> simplify the code a bit. To make the function signatures work out,
> there would need to be an intermediate SRCU function to supply the right
> rcu_struct pointer.
>
> This would shorten and simplify the code a bit.
>
> Or is there some reason that this won't work?
Hi, Paul
Thanks for your suggestion, I will resend with reference to the
suggestions above.
Thanks
Zqiang
>
> Why didn't I do that to start with? Well, the various RCU flavors
> appeared one at a time over some years... ;-)
>
> Thanx, Paul
>
> > ---
> > kernel/rcu/rcu.h | 8 ++++++++
> > kernel/rcu/rcutorture.c | 3 +++
> > kernel/rcu/tasks.h | 25 +++++++++++++++++++++++++
> > 3 files changed, 36 insertions(+)
> >
> > diff --git a/kernel/rcu/rcu.h b/kernel/rcu/rcu.h
> > index 86fce206560e..3353e3697645 100644
> > --- a/kernel/rcu/rcu.h
> > +++ b/kernel/rcu/rcu.h
> > @@ -556,6 +556,14 @@ static inline unsigned long rcu_get_jiffies_lazy_flush(void) { return 0; }
> > static inline void rcu_set_jiffies_lazy_flush(unsigned long j) { }
> > #endif
> >
> > +#ifdef CONFIG_TASKS_RCU_GENERIC
> > +void rcutaskstorture_get_gp_data(enum rcutorture_type test_type, int *flags,
> > + unsigned long *gp_seq);
> > +#else
> > +static inline void rcutaskstorture_get_gp_data(enum rcutorture_type test_type, int *flags,
> > + unsigned long *gp_seq) { }
> > +#endif
> > +
> > #if defined(CONFIG_TREE_RCU)
> > void rcutorture_get_gp_data(enum rcutorture_type test_type, int *flags,
> > unsigned long *gp_seq);
> > diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c
> > index dd7d5ba45740..91c03f37fd97 100644
> > --- a/kernel/rcu/rcutorture.c
> > +++ b/kernel/rcu/rcutorture.c
> > @@ -2267,6 +2267,7 @@ rcu_torture_stats_print(void)
> > &flags, &gp_seq);
> > srcutorture_get_gp_data(cur_ops->ttype, srcu_ctlp,
> > &flags, &gp_seq);
> > + rcutaskstorture_get_gp_data(cur_ops->ttype, &flags, &gp_seq);
> > wtp = READ_ONCE(writer_task);
> > pr_alert("??? Writer stall state %s(%d) g%lu f%#x ->state %#x cpu %d\n",
> > rcu_torture_writer_state_getname(),
> > @@ -3391,6 +3392,7 @@ rcu_torture_cleanup(void)
> >
> > rcutorture_get_gp_data(cur_ops->ttype, &flags, &gp_seq);
> > srcutorture_get_gp_data(cur_ops->ttype, srcu_ctlp, &flags, &gp_seq);
> > + rcutaskstorture_get_gp_data(cur_ops->ttype, &flags, &gp_seq);
> > pr_alert("%s: End-test grace-period state: g%ld f%#x total-gps=%ld\n",
> > cur_ops->name, (long)gp_seq, flags,
> > rcutorture_seq_diff(gp_seq, start_gp_seq));
> > @@ -3763,6 +3765,7 @@ rcu_torture_init(void)
> > rcu_torture_print_module_parms(cur_ops, "Start of test");
> > rcutorture_get_gp_data(cur_ops->ttype, &flags, &gp_seq);
> > srcutorture_get_gp_data(cur_ops->ttype, srcu_ctlp, &flags, &gp_seq);
> > + rcutaskstorture_get_gp_data(cur_ops->ttype, &flags, &gp_seq);
> > start_gp_seq = gp_seq;
> > pr_alert("%s: Start-test grace-period state: g%ld f%#x\n",
> > cur_ops->name, (long)gp_seq, flags);
> > diff --git a/kernel/rcu/tasks.h b/kernel/rcu/tasks.h
> > index e83adcdb49b5..b1254cf3c210 100644
> > --- a/kernel/rcu/tasks.h
> > +++ b/kernel/rcu/tasks.h
> > @@ -2149,6 +2149,31 @@ late_initcall(rcu_tasks_verify_schedule_work);
> > static void rcu_tasks_initiate_self_tests(void) { }
> > #endif /* #else #ifdef CONFIG_PROVE_RCU */
> >
> > +void rcutaskstorture_get_gp_data(enum rcutorture_type test_type, int *flags,
> > + unsigned long *gp_seq)
> > +{
> > + switch (test_type) {
> > + case RCU_TASKS_FLAVOR:
> > +#ifdef CONFIG_TASKS_RCU
> > + *gp_seq = rcu_seq_current(&rcu_tasks.tasks_gp_seq);
> > +#endif
> > + break;
> > + case RCU_TASKS_RUDE_FLAVOR:
> > +#ifdef CONFIG_TASKS_RUDE_RCU
> > + *gp_seq = rcu_seq_current(&rcu_tasks_rude.tasks_gp_seq);
> > +#endif
> > + break;
> > + case RCU_TASKS_TRACING_FLAVOR:
> > +#ifdef CONFIG_TASKS_TRACE_RCU
> > + *gp_seq = rcu_seq_current(&rcu_tasks_trace.tasks_gp_seq);
> > +#endif
> > + break;
> > + default:
> > + break;
> > + }
> > +}
> > +EXPORT_SYMBOL_GPL(rcutaskstorture_get_gp_data);
> > +
> > void __init tasks_cblist_init_generic(void)
> > {
> > lockdep_assert_irqs_disabled();
> > --
> > 2.17.1
> >
On Sun, Mar 17, 2024 at 03:16:43PM +0800, Z qiang wrote:
> >
> > On Tue, Mar 12, 2024 at 03:23:57PM +0800, Zqiang wrote:
> > > This commit make rcu-tasks related rcutorture test support rcu-tasks
> > > gp state printing when the writer stall occurs or the at the end of
> > > rcutorture test.
> > >
> > > The test is as follows:
> > > [ 3872.548702] tasks-tracing: Start-test grace-period state: g4560 f0x0
> > > [ 4332.661283] tasks-tracing: End-test grace-period state: g41540 f0x0 total-gps=36980
> > >
> > > [ 4401.381138] tasks: Start-test grace-period state: g8 f0x0
> > > [ 4565.619354] tasks: End-test grace-period state: g1732 f0x0 total-gps=1724
> > >
> > > [ 4589.006917] tasks-rude: Start-test grace-period state: g8 f0x0
> > > [ 5059.379321] tasks-rude: End-test grace-period state: g8508 f0x0 total-gps=8500
> > >
> > > Signed-off-by: Zqiang <[email protected]>
> >
> > Again, good eyes, and that fix would work. But wouldn't it make more
> > sense to create a new cur_ops function pointer for these functions?
> > That might allow getting rid of the *_FLAVOR checks and values, plus
> > simplify the code a bit. To make the function signatures work out,
> > there would need to be an intermediate SRCU function to supply the right
> > rcu_struct pointer.
> >
> > This would shorten and simplify the code a bit.
> >
> > Or is there some reason that this won't work?
>
> Hi, Paul
>
> Thanks for your suggestion, I will resend with reference to the
> suggestions above.
Very good, looking forward to seeing it!
Thanx, Paul
> Thanks
> Zqiang
>
>
> >
> > Why didn't I do that to start with? Well, the various RCU flavors
> > appeared one at a time over some years... ;-)
> >
> > Thanx, Paul
> >
> > > ---
> > > kernel/rcu/rcu.h | 8 ++++++++
> > > kernel/rcu/rcutorture.c | 3 +++
> > > kernel/rcu/tasks.h | 25 +++++++++++++++++++++++++
> > > 3 files changed, 36 insertions(+)
> > >
> > > diff --git a/kernel/rcu/rcu.h b/kernel/rcu/rcu.h
> > > index 86fce206560e..3353e3697645 100644
> > > --- a/kernel/rcu/rcu.h
> > > +++ b/kernel/rcu/rcu.h
> > > @@ -556,6 +556,14 @@ static inline unsigned long rcu_get_jiffies_lazy_flush(void) { return 0; }
> > > static inline void rcu_set_jiffies_lazy_flush(unsigned long j) { }
> > > #endif
> > >
> > > +#ifdef CONFIG_TASKS_RCU_GENERIC
> > > +void rcutaskstorture_get_gp_data(enum rcutorture_type test_type, int *flags,
> > > + unsigned long *gp_seq);
> > > +#else
> > > +static inline void rcutaskstorture_get_gp_data(enum rcutorture_type test_type, int *flags,
> > > + unsigned long *gp_seq) { }
> > > +#endif
> > > +
> > > #if defined(CONFIG_TREE_RCU)
> > > void rcutorture_get_gp_data(enum rcutorture_type test_type, int *flags,
> > > unsigned long *gp_seq);
> > > diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c
> > > index dd7d5ba45740..91c03f37fd97 100644
> > > --- a/kernel/rcu/rcutorture.c
> > > +++ b/kernel/rcu/rcutorture.c
> > > @@ -2267,6 +2267,7 @@ rcu_torture_stats_print(void)
> > > &flags, &gp_seq);
> > > srcutorture_get_gp_data(cur_ops->ttype, srcu_ctlp,
> > > &flags, &gp_seq);
> > > + rcutaskstorture_get_gp_data(cur_ops->ttype, &flags, &gp_seq);
> > > wtp = READ_ONCE(writer_task);
> > > pr_alert("??? Writer stall state %s(%d) g%lu f%#x ->state %#x cpu %d\n",
> > > rcu_torture_writer_state_getname(),
> > > @@ -3391,6 +3392,7 @@ rcu_torture_cleanup(void)
> > >
> > > rcutorture_get_gp_data(cur_ops->ttype, &flags, &gp_seq);
> > > srcutorture_get_gp_data(cur_ops->ttype, srcu_ctlp, &flags, &gp_seq);
> > > + rcutaskstorture_get_gp_data(cur_ops->ttype, &flags, &gp_seq);
> > > pr_alert("%s: End-test grace-period state: g%ld f%#x total-gps=%ld\n",
> > > cur_ops->name, (long)gp_seq, flags,
> > > rcutorture_seq_diff(gp_seq, start_gp_seq));
> > > @@ -3763,6 +3765,7 @@ rcu_torture_init(void)
> > > rcu_torture_print_module_parms(cur_ops, "Start of test");
> > > rcutorture_get_gp_data(cur_ops->ttype, &flags, &gp_seq);
> > > srcutorture_get_gp_data(cur_ops->ttype, srcu_ctlp, &flags, &gp_seq);
> > > + rcutaskstorture_get_gp_data(cur_ops->ttype, &flags, &gp_seq);
> > > start_gp_seq = gp_seq;
> > > pr_alert("%s: Start-test grace-period state: g%ld f%#x\n",
> > > cur_ops->name, (long)gp_seq, flags);
> > > diff --git a/kernel/rcu/tasks.h b/kernel/rcu/tasks.h
> > > index e83adcdb49b5..b1254cf3c210 100644
> > > --- a/kernel/rcu/tasks.h
> > > +++ b/kernel/rcu/tasks.h
> > > @@ -2149,6 +2149,31 @@ late_initcall(rcu_tasks_verify_schedule_work);
> > > static void rcu_tasks_initiate_self_tests(void) { }
> > > #endif /* #else #ifdef CONFIG_PROVE_RCU */
> > >
> > > +void rcutaskstorture_get_gp_data(enum rcutorture_type test_type, int *flags,
> > > + unsigned long *gp_seq)
> > > +{
> > > + switch (test_type) {
> > > + case RCU_TASKS_FLAVOR:
> > > +#ifdef CONFIG_TASKS_RCU
> > > + *gp_seq = rcu_seq_current(&rcu_tasks.tasks_gp_seq);
> > > +#endif
> > > + break;
> > > + case RCU_TASKS_RUDE_FLAVOR:
> > > +#ifdef CONFIG_TASKS_RUDE_RCU
> > > + *gp_seq = rcu_seq_current(&rcu_tasks_rude.tasks_gp_seq);
> > > +#endif
> > > + break;
> > > + case RCU_TASKS_TRACING_FLAVOR:
> > > +#ifdef CONFIG_TASKS_TRACE_RCU
> > > + *gp_seq = rcu_seq_current(&rcu_tasks_trace.tasks_gp_seq);
> > > +#endif
> > > + break;
> > > + default:
> > > + break;
> > > + }
> > > +}
> > > +EXPORT_SYMBOL_GPL(rcutaskstorture_get_gp_data);
> > > +
> > > void __init tasks_cblist_init_generic(void)
> > > {
> > > lockdep_assert_irqs_disabled();
> > > --
> > > 2.17.1
> > >