* [PATCH] rcu: in_irq() cleanup
@ 2021-09-28 0:21 Changbin Du
2021-09-28 21:03 ` Paul E. McKenney
0 siblings, 1 reply; 2+ messages in thread
From: Changbin Du @ 2021-09-28 0:21 UTC (permalink / raw)
To: Paul E. McKenney, Josh Triplett; +Cc: rcu, linux-kernel, Changbin Du
Replace the obsolete and ambiguos macro in_irq() with new
macro in_hardirq().
Signed-off-by: Changbin Du <changbin.du@gmail.com>
---
include/linux/rcutiny.h | 2 +-
kernel/rcu/tree.c | 2 +-
kernel/rcu/tree_plugin.h | 2 +-
3 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/include/linux/rcutiny.h b/include/linux/rcutiny.h
index 9be015305f9f..858f4d429946 100644
--- a/include/linux/rcutiny.h
+++ b/include/linux/rcutiny.h
@@ -85,7 +85,7 @@ static inline void rcu_irq_enter_irqson(void) { }
static inline void rcu_irq_exit(void) { }
static inline void rcu_irq_exit_check_preempt(void) { }
#define rcu_is_idle_cpu(cpu) \
- (is_idle_task(current) && !in_nmi() && !in_irq() && !in_serving_softirq())
+ (is_idle_task(current) && !in_nmi() && !in_hardirq() && !in_serving_softirq())
static inline void exit_rcu(void) { }
static inline bool rcu_preempt_need_deferred_qs(struct task_struct *t)
{
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index bce848e50512..b53dd00975ab 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -1471,7 +1471,7 @@ static void rcu_gp_kthread_wake(void)
{
struct task_struct *t = READ_ONCE(rcu_state.gp_kthread);
- if ((current == t && !in_irq() && !in_serving_softirq()) ||
+ if ((current == t && !in_hardirq() && !in_serving_softirq()) ||
!READ_ONCE(rcu_state.gp_flags) || !t)
return;
WRITE_ONCE(rcu_state.gp_wake_time, jiffies);
diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h
index d070059163d7..727bf14c9a63 100644
--- a/kernel/rcu/tree_plugin.h
+++ b/kernel/rcu/tree_plugin.h
@@ -642,7 +642,7 @@ static void rcu_read_unlock_special(struct task_struct *t)
(IS_ENABLED(CONFIG_RCU_BOOST) && irqs_were_disabled &&
t->rcu_blocked_node);
// Need to defer quiescent state until everything is enabled.
- if (use_softirq && (in_irq() || (expboost && !irqs_were_disabled))) {
+ if (use_softirq && (in_hardirq() || (expboost && !irqs_were_disabled))) {
// Using softirq, safe to awaken, and either the
// wakeup is free or there is either an expedited
// GP in flight or a potential need to deboost.
--
2.32.0
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] rcu: in_irq() cleanup
2021-09-28 0:21 [PATCH] rcu: in_irq() cleanup Changbin Du
@ 2021-09-28 21:03 ` Paul E. McKenney
0 siblings, 0 replies; 2+ messages in thread
From: Paul E. McKenney @ 2021-09-28 21:03 UTC (permalink / raw)
To: Changbin Du; +Cc: Josh Triplett, rcu, linux-kernel
On Tue, Sep 28, 2021 at 08:21:28AM +0800, Changbin Du wrote:
> Replace the obsolete and ambiguos macro in_irq() with new
> macro in_hardirq().
>
> Signed-off-by: Changbin Du <changbin.du@gmail.com>
Queued for v5.17 (merge window after next), thank you!
Thanx, Paul
> ---
> include/linux/rcutiny.h | 2 +-
> kernel/rcu/tree.c | 2 +-
> kernel/rcu/tree_plugin.h | 2 +-
> 3 files changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/include/linux/rcutiny.h b/include/linux/rcutiny.h
> index 9be015305f9f..858f4d429946 100644
> --- a/include/linux/rcutiny.h
> +++ b/include/linux/rcutiny.h
> @@ -85,7 +85,7 @@ static inline void rcu_irq_enter_irqson(void) { }
> static inline void rcu_irq_exit(void) { }
> static inline void rcu_irq_exit_check_preempt(void) { }
> #define rcu_is_idle_cpu(cpu) \
> - (is_idle_task(current) && !in_nmi() && !in_irq() && !in_serving_softirq())
> + (is_idle_task(current) && !in_nmi() && !in_hardirq() && !in_serving_softirq())
> static inline void exit_rcu(void) { }
> static inline bool rcu_preempt_need_deferred_qs(struct task_struct *t)
> {
> diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
> index bce848e50512..b53dd00975ab 100644
> --- a/kernel/rcu/tree.c
> +++ b/kernel/rcu/tree.c
> @@ -1471,7 +1471,7 @@ static void rcu_gp_kthread_wake(void)
> {
> struct task_struct *t = READ_ONCE(rcu_state.gp_kthread);
>
> - if ((current == t && !in_irq() && !in_serving_softirq()) ||
> + if ((current == t && !in_hardirq() && !in_serving_softirq()) ||
> !READ_ONCE(rcu_state.gp_flags) || !t)
> return;
> WRITE_ONCE(rcu_state.gp_wake_time, jiffies);
> diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h
> index d070059163d7..727bf14c9a63 100644
> --- a/kernel/rcu/tree_plugin.h
> +++ b/kernel/rcu/tree_plugin.h
> @@ -642,7 +642,7 @@ static void rcu_read_unlock_special(struct task_struct *t)
> (IS_ENABLED(CONFIG_RCU_BOOST) && irqs_were_disabled &&
> t->rcu_blocked_node);
> // Need to defer quiescent state until everything is enabled.
> - if (use_softirq && (in_irq() || (expboost && !irqs_were_disabled))) {
> + if (use_softirq && (in_hardirq() || (expboost && !irqs_were_disabled))) {
> // Using softirq, safe to awaken, and either the
> // wakeup is free or there is either an expedited
> // GP in flight or a potential need to deboost.
> --
> 2.32.0
>
^ permalink raw reply [flat|nested] 2+ messages in thread
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