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Message-Id: <20210813145101.85782-1-changbin.du@gmail.com>
Date: Fri, 13 Aug 2021 22:51:01 +0800
From: Changbin Du <changbin.du@...il.com>
To: Peter Zijlstra <peterz@...radead.org>,
Ingo Molnar <mingo@...hat.com>
Cc: Will Deacon <will@...nel.org>,
"Paul E. McKenney" <paulmck@...nel.org>,
Josh Triplett <josh@...htriplett.org>,
Thomas Gleixner <tglx@...utronix.de>,
Petr Mladek <pmladek@...e.com>, linux-kernel@...r.kernel.org,
rcu@...r.kernel.org, Changbin Du <changbin.du@...il.com>
Subject: [PATCH] kernel: in_irq() cleanup
Replace the obsolete and ambiguos macro in_irq() with new
macro in_hardirq().
Signed-off-by: Changbin Du <changbin.du@...il.com>
---
include/linux/lockdep.h | 2 +-
include/linux/rcutiny.h | 2 +-
kernel/irq/irqdesc.c | 2 +-
kernel/rcu/tree.c | 2 +-
kernel/rcu/tree_plugin.h | 2 +-
kernel/softirq.c | 10 +++++-----
kernel/time/timer.c | 4 ++--
kernel/trace/trace.h | 2 +-
kernel/trace/trace_functions_graph.c | 2 +-
lib/locking-selftest.c | 4 ++--
lib/vsprintf.c | 2 +-
11 files changed, 17 insertions(+), 17 deletions(-)
diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h
index 5cf387813754..e7aa0050bfd8 100644
--- a/include/linux/lockdep.h
+++ b/include/linux/lockdep.h
@@ -633,7 +633,7 @@ do { \
#define lockdep_assert_in_softirq() \
do { \
WARN_ON_ONCE(__lockdep_enabled && \
- (!in_softirq() || in_irq() || in_nmi())); \
+ (!in_softirq() || in_hardirq() || in_nmi())); \
} while (0)
#else
diff --git a/include/linux/rcutiny.h b/include/linux/rcutiny.h
index 953e70fafe38..7fedbd33d5d2 100644
--- a/include/linux/rcutiny.h
+++ b/include/linux/rcutiny.h
@@ -88,7 +88,7 @@ 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/irq/irqdesc.c b/kernel/irq/irqdesc.c
index fadb93766020..0ffd6c19259f 100644
--- a/kernel/irq/irqdesc.c
+++ b/kernel/irq/irqdesc.c
@@ -640,7 +640,7 @@ int handle_irq_desc(struct irq_desc *desc)
return -EINVAL;
data = irq_desc_get_irq_data(desc);
- if (WARN_ON_ONCE(!in_irq() && handle_enforce_irqctx(data)))
+ if (WARN_ON_ONCE(!in_hardirq() && handle_enforce_irqctx(data)))
return -EPERM;
generic_handle_irq_desc(desc);
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index 51f24ecd94b2..18f6658f0713 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -1510,7 +1510,7 @@ 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 de1dc3bb7f70..953171af6d0c 100644
--- a/kernel/rcu/tree_plugin.h
+++ b/kernel/rcu/tree_plugin.h
@@ -672,7 +672,7 @@ 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.
diff --git a/kernel/softirq.c b/kernel/softirq.c
index f3a012179f47..e8c62c4b1e5d 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -222,7 +222,7 @@ void __local_bh_enable_ip(unsigned long ip, unsigned int cnt)
u32 pending;
int curcnt;
- WARN_ON_ONCE(in_irq());
+ WARN_ON_ONCE(in_hardirq());
lockdep_assert_irqs_enabled();
local_irq_save(flags);
@@ -305,7 +305,7 @@ void __local_bh_disable_ip(unsigned long ip, unsigned int cnt)
{
unsigned long flags;
- WARN_ON_ONCE(in_irq());
+ WARN_ON_ONCE(in_hardirq());
raw_local_irq_save(flags);
/*
@@ -352,14 +352,14 @@ static void __local_bh_enable(unsigned int cnt)
*/
void _local_bh_enable(void)
{
- WARN_ON_ONCE(in_irq());
+ WARN_ON_ONCE(in_hardirq());
__local_bh_enable(SOFTIRQ_DISABLE_OFFSET);
}
EXPORT_SYMBOL(_local_bh_enable);
void __local_bh_enable_ip(unsigned long ip, unsigned int cnt)
{
- WARN_ON_ONCE(in_irq());
+ WARN_ON_ONCE(in_hardirq());
lockdep_assert_irqs_enabled();
#ifdef CONFIG_TRACE_IRQFLAGS
local_irq_disable();
@@ -617,7 +617,7 @@ static inline void tick_irq_exit(void)
/* Make sure that timer wheel updates are propagated */
if ((idle_cpu(cpu) && !need_resched()) || tick_nohz_full_cpu(cpu)) {
- if (!in_irq())
+ if (!in_hardirq())
tick_nohz_irq_exit();
}
#endif
diff --git a/kernel/time/timer.c b/kernel/time/timer.c
index e3d2c23c413d..dfdbb114a43d 100644
--- a/kernel/time/timer.c
+++ b/kernel/time/timer.c
@@ -1369,7 +1369,7 @@ int del_timer_sync(struct timer_list *timer)
* don't use it in hardirq context, because it
* could lead to deadlock.
*/
- WARN_ON(in_irq() && !(timer->flags & TIMER_IRQSAFE));
+ WARN_ON(in_hardirq() && !(timer->flags & TIMER_IRQSAFE));
/*
* Must be able to sleep on PREEMPT_RT because of the slowpath in
@@ -1784,7 +1784,7 @@ void update_process_times(int user_tick)
run_local_timers();
rcu_sched_clock_irq(user_tick);
#ifdef CONFIG_IRQ_WORK
- if (in_irq())
+ if (in_hardirq())
irq_work_tick();
#endif
scheduler_tick();
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index a180abf76d4e..2ed5b77b60ca 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -876,7 +876,7 @@ static inline int ftrace_graph_addr(struct ftrace_graph_ent *trace)
* is set, and called by an interrupt handler, we still
* want to trace it.
*/
- if (in_irq())
+ if (in_hardirq())
trace_recursion_set(TRACE_IRQ_BIT);
else
trace_recursion_clear(TRACE_IRQ_BIT);
diff --git a/kernel/trace/trace_functions_graph.c b/kernel/trace/trace_functions_graph.c
index 0de6837722da..b08d3923de98 100644
--- a/kernel/trace/trace_functions_graph.c
+++ b/kernel/trace/trace_functions_graph.c
@@ -120,7 +120,7 @@ static inline int ftrace_graph_ignore_irqs(void)
if (!ftrace_graph_skip_irqs || trace_recursion_test(TRACE_IRQ_BIT))
return 0;
- return in_irq();
+ return in_hardirq();
}
int trace_graph_entry(struct ftrace_graph_ent *trace)
diff --git a/lib/locking-selftest.c b/lib/locking-selftest.c
index 161108e5d2fe..a4edff9ffc33 100644
--- a/lib/locking-selftest.c
+++ b/lib/locking-selftest.c
@@ -196,7 +196,7 @@ static void init_shared_classes(void)
local_irq_disable(); \
__irq_enter(); \
lockdep_hardirq_threaded(); \
- WARN_ON(!in_irq());
+ WARN_ON(!in_hardirq());
#define HARDIRQ_EXIT() \
__irq_exit(); \
@@ -2456,7 +2456,7 @@ static void hardirq_exit(int *_)
int notthreaded_hardirq_guard_##name __guard(hardirq_exit); \
local_irq_disable(); \
__irq_enter(); \
- WARN_ON(!in_irq());
+ WARN_ON(!in_hardirq());
static void softirq_exit(int *_)
{
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index 26c83943748a..2c5b4351330c 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -865,7 +865,7 @@ char *restricted_pointer(char *buf, char *end, const void *ptr,
* kptr_restrict==1 cannot be used in IRQ context
* because its test for CAP_SYSLOG would be meaningless.
*/
- if (in_irq() || in_serving_softirq() || in_nmi()) {
+ if (in_hardirq() || in_serving_softirq() || in_nmi()) {
if (spec.field_width == -1)
spec.field_width = 2 * sizeof(ptr);
return error_string(buf, end, "pK-error", spec);
--
2.30.2
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