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rcu: Rename some instance of CONFIG_PREEMPTION to CONFIG_PREEMPT_RCU

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CONFIG_PREEMPTION and CONFIG_PREEMPT_RCU are always identical,
but some code depends on CONFIG_PREEMPTION to access to
rcu_preempt functionality. This patch changes CONFIG_PREEMPTION
to CONFIG_PREEMPT_RCU in these cases.

Signed-off-by: Lai Jiangshan <jiangshanlai@gmail.com>
Signed-off-by: Lai Jiangshan <laijs@linux.alibaba.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Lai Jiangshan 2019-10-15 10:28:48 +00:00 committed by Paul E. McKenney
parent 90326f0521
commit c130d2dc93
2 changed files with 5 additions and 5 deletions
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4
kernel/rcu/tree.c
View File

@ -1934,7 +1934,7 @@ rcu_report_unblock_qs_rnp(struct rcu_node *rnp, unsigned long flags)
struct rcu_node *rnp_p; struct rcu_node *rnp_p;
raw_lockdep_assert_held_rcu_node(rnp); raw_lockdep_assert_held_rcu_node(rnp);
if (WARN_ON_ONCE(!IS_ENABLED(CONFIG_PREEMPTION)) || if (WARN_ON_ONCE(!IS_ENABLED(CONFIG_PREEMPT_RCU)) ||
WARN_ON_ONCE(rcu_preempt_blocked_readers_cgp(rnp)) || WARN_ON_ONCE(rcu_preempt_blocked_readers_cgp(rnp)) ||
rnp->qsmask != 0) { rnp->qsmask != 0) {
raw_spin_unlock_irqrestore_rcu_node(rnp, flags); raw_spin_unlock_irqrestore_rcu_node(rnp, flags);
@ -2294,7 +2294,7 @@ static void force_qs_rnp(int (*f)(struct rcu_data *rdp))
mask = 0; mask = 0;
raw_spin_lock_irqsave_rcu_node(rnp, flags); raw_spin_lock_irqsave_rcu_node(rnp, flags);
if (rnp->qsmask == 0) { if (rnp->qsmask == 0) {
if (!IS_ENABLED(CONFIG_PREEMPTION) || if (!IS_ENABLED(CONFIG_PREEMPT_RCU) ||
rcu_preempt_blocked_readers_cgp(rnp)) { rcu_preempt_blocked_readers_cgp(rnp)) {
/* /*
* No point in scanning bits because they * No point in scanning bits because they

6
kernel/rcu/tree_stall.h
View File

@ -163,7 +163,7 @@ static void rcu_iw_handler(struct irq_work *iwp)
// //
// Printing RCU CPU stall warnings // Printing RCU CPU stall warnings
#ifdef CONFIG_PREEMPTION #ifdef CONFIG_PREEMPT_RCU
/* /*
* Dump detailed information for all tasks blocking the current RCU * Dump detailed information for all tasks blocking the current RCU
@ -215,7 +215,7 @@ static int rcu_print_task_stall(struct rcu_node *rnp)
return ndetected; return ndetected;
} }
#else /* #ifdef CONFIG_PREEMPTION */ #else /* #ifdef CONFIG_PREEMPT_RCU */
/* /*
* Because preemptible RCU does not exist, we never have to check for * Because preemptible RCU does not exist, we never have to check for
@ -233,7 +233,7 @@ static int rcu_print_task_stall(struct rcu_node *rnp)
{ {
return 0; return 0;
} }
#endif /* #else #ifdef CONFIG_PREEMPTION */ #endif /* #else #ifdef CONFIG_PREEMPT_RCU */
/* /*
* Dump stacks of all tasks running on stalled CPUs. First try using * Dump stacks of all tasks running on stalled CPUs. First try using