treewide: Remove in_irq()

This old alias for in_hardirq() has been marked as deprecated since
2020; remove the stragglers.

Signed-off-by: Matthew Wilcox (Oracle) <[e-mail]>
Signed-off-by: Thomas Gleixner <[e-mail]>
Link: https://patch.msgid.link/[e-mail]

drivers/bus/fsl-mc/mc-sys.c

···
 	enum mc_cmd_status status;
 	unsigned long irq_flags = 0;
 
-	if (in_irq() && !(mc_io->flags & FSL_MC_IO_ATOMIC_CONTEXT_PORTAL))
+	if (in_hardirq() && !(mc_io->flags & FSL_MC_IO_ATOMIC_CONTEXT_PORTAL))
 		return -EINVAL;
 
 	if (mc_io->flags & FSL_MC_IO_ATOMIC_CONTEXT_PORTAL)

drivers/md/dm-vdo/logger.c

···
 	if (in_nmi())
 		return "NMI";
 
-	if (in_irq())
+	if (in_hardirq())
 		return "HI";
 
 	if (in_softirq())

include/linux/lockdep.h

···
 #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)
 
 extern void lockdep_assert_in_softirq_func(void);

include/linux/preempt.h

···
 
 /*
  * The following macros are deprecated and should not be used in new code:
- * in_irq()       - Obsolete version of in_hardirq()
  * in_softirq()   - We have BH disabled, or are processing softirqs
  * in_interrupt() - We're in NMI,IRQ,SoftIRQ context or have BH disabled
  */
-#define in_irq()		(hardirq_count())
 #define in_softirq()		(softirq_count())
 #define in_interrupt()		(irq_count())
 

kernel/bpf/syscall.c

···
 		return;
 	if (audit_enabled == AUDIT_OFF)
 		return;
-	if (!in_irq() && !irqs_disabled())
+	if (!in_hardirq() && !irqs_disabled())
 		ctx = audit_context();
 	ab = audit_log_start(ctx, GFP_ATOMIC, AUDIT_BPF);
 	if (unlikely(!ab))
···
 	struct bpf_prog_aux *aux = prog->aux;
 
 	if (atomic64_dec_and_test(&aux->refcnt)) {
-		if (in_irq() || irqs_disabled()) {
+		if (in_hardirq() || irqs_disabled()) {
 			INIT_WORK(&aux->work, bpf_prog_put_deferred);
 			schedule_work(&aux->work);
 		} else {

kernel/time/timer.c

···
 	run_local_timers();
 	rcu_sched_clock_irq(user_tick);
 #ifdef CONFIG_IRQ_WORK
-	if (in_irq())
+	if (in_hardirq())
 		irq_work_tick();
 #endif
 	sched_tick();

lib/locking-selftest.c

···
 	local_irq_disable();			\
 	__irq_enter();				\
 	lockdep_hardirq_threaded();		\
-	WARN_ON(!in_irq());
+	WARN_ON(!in_hardirq());
 
 #define HARDIRQ_EXIT()				\
 	__irq_exit();				\
···
 	do {
 		local_irq_disable();
 		__irq_enter();
-		WARN_ON(!in_irq());
+		WARN_ON(!in_hardirq());
 	} while(0), HARDIRQ_EXIT())
 DEFINE_LOCK_GUARD_0(SOFTIRQ, SOFTIRQ_ENTER(), SOFTIRQ_EXIT())