diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/rcutree.c | 5 | ||||
| -rw-r--r-- | kernel/rcutree.h | 1 |
2 files changed, 5 insertions, 1 deletions
diff --git a/kernel/rcutree.c b/kernel/rcutree.c index d62c04482228..6b82a9565149 100644 --- a/kernel/rcutree.c +++ b/kernel/rcutree.c @@ -206,6 +206,9 @@ EXPORT_SYMBOL_GPL(rcu_note_context_switch); DEFINE_PER_CPU(struct rcu_dynticks, rcu_dynticks) = { .dynticks_nesting = DYNTICK_TASK_EXIT_IDLE, .dynticks = ATOMIC_INIT(1), +#ifdef CONFIG_RCU_USER_QS + .ignore_user_qs = true, +#endif }; static int blimit = 10; /* Maximum callbacks per rcu_do_batch. */ @@ -430,7 +433,7 @@ void rcu_user_enter(void) local_irq_save(flags); rdtp = &__get_cpu_var(rcu_dynticks); - if (!rdtp->in_user) { + if (!rdtp->ignore_user_qs && !rdtp->in_user) { rdtp->in_user = true; rcu_eqs_enter(1); } diff --git a/kernel/rcutree.h b/kernel/rcutree.h index 10cc2f9f8433..5faf05d68326 100644 --- a/kernel/rcutree.h +++ b/kernel/rcutree.h @@ -103,6 +103,7 @@ struct rcu_dynticks { int tick_nohz_enabled_snap; /* Previously seen value from sysfs. */ #endif /* #ifdef CONFIG_RCU_FAST_NO_HZ */ #ifdef CONFIG_RCU_USER_QS + bool ignore_user_qs; /* Treat userspace as extended QS or not */ bool in_user; /* Is the CPU in userland from RCU POV? */ #endif }; |